Making fertilizers and writing essays

1. Diary of steps to make fertilizer

Make your own fertilizer. In fact, making flower fertilizer is very simple, just use kitchen scraps to make retting fertilizer. What flowers and plants need most are nitrogen, phosphorus, and potassium. Nitrogen fertilizer is the main fertilizer to promote the growth of flower roots, stems, and leaves. Oil crops such as beans, peanuts, melon seeds, etc. that are inedible due to mildew can be broken and boiled, then placed in a small jar, filled with water, and then sealed for fermentation. , let it rot. After 10 days of high temperature weather, you can take out the upper layer of fertilizer and water and use it to water the flowers and plants. After use, fill it with water and retting. Phosphate fertilizers are also very common in life. Fish intestines, meat bones, fish bones, cut hair, nails, chicken and duck feathers, crab shells, etc. These sundries are rich in phosphorus and can be used to water flowers after fermentation and decay. , will make the flowers colorful, bright and full of fruits. Potassium fertilizer can improve the resistance of flowers to lodging and prevent diseases and insect pests. Potassium fertilizer comes from rice swill, leftover tea water, milk bottle water, etc.

When making these fertilizers, these fertilizers must be retted. The fertilizer water leached out must wait until the fertilizer water turns black before it can be poured out and mixed with water to water the flowers. The ratio is nine water to one fertilizer. Then pour it into the flower pot. Remember not to use the fertilizer without retting. 2. How to write an essay on fertilization

Today is the ninth day of the first lunar month, and it is rare to have good weather. My younger siblings and I were tired of staying at home, so we made an appointment with my grandma to go to the tea fields in the mountains to fertilize.

Because it was my first time to come into contact with fertilizer, I observed it carefully. They were some small white and round particles, which looked very ordinary and felt a bit rough to the touch. Although it is small, it is quite heavy when gathered together. It is only half a sack and it makes me breathless. The road up the mountain is particularly difficult. Not to mention the potholes, there are bushes full of thorns on both sides of the road. If you are not careful, you will prick your hand.

Although the mountain road is difficult to walk, the scenery is extremely beautiful. Looking around, there are lush mountains, one is lighter than the other, and each is further away. The air in the mountains is the freshest. I breathed the fresh and pure air and listened to the gurgling streams and cheerful birdsong. It felt so good! The strangest thing is that there is no sign of winter here. Nature is so amazing.

When we arrived at the mountain, we were all so tired that we were panting and sweating profusely. When it’s time to fertilize, we shuttle through the tea fields, holding the box in one hand and spreading fertilizer with the other. Accidentally, I spilled the fertilizer on my sister's head, and her black and shiny hair immediately sprouted baby's breath. It looked so cute that I couldn't help laughing. Before I could react, I was also hit by the baby's breath sprinkled by my sister, so the three of us started a fertilizer war with each other. Just when we were having a great time, grandma severely criticized us: "You ignorant children, how can fertilizer be used for playing! Not to mention the waste, it is so dangerous to hit your eyes..." We know If you are wrong, you should apply fertilizer seriously.

Although we were very tired during this fertilization, we experienced the fun and hardship of labor. Thinking that my grandma is still working every day in the mountains at such an old age, I must help her do more things within my ability in the future and be a good, hard-working and filial child. 3. Plant trees, fertilize, water and write an essay

On this day, the weather was sunny. My mother and I went to the community garden to plant trees. My mother and I brought shovels and buckets and carried young saplings. Plant trees in a small garden.

I first loosened the soil with my toy shovel, and then my mother easily dug with a big shovel and dug a big hole. Spring is here, it whistles and wakes up everything. You see: the river sings and starts running, the grass emerges from the ground, the willow tree opens its yellow-green eyes, and the peach blossom opens its round face...Planting trees The festival has arrived.

On this day, the weather was fine, and my mother and I went to the small community garden to plant trees. My mother and I brought shovels and buckets, and carried saplings to the small garden to plant trees. I first loosened the soil with my toy shovel, and then my mother easily dug with a big shovel and dug a big hole.

Then, I took out a small sapling from behind, carefully buried it in the soil, and then buried the roots of the small sapling with soil. I took a bucket of water and poured it slowly. Around the saplings, I said softly while watering them: "Small saplings, drink quickly. When you are full, take root quickly, sprout quickly, and grow up quickly!" The little sapling understood my words and drank it after a while. Finished a bucket of water. My mother and I worked for a long time, and rows of saplings appeared in the small garden. I seemed to see a forest. 4. An essay about civilization being the fertilizer of culture

Talk about the difference between civilization and simple negligence. Writers must ask for examples of the difference between civilization and tell them about it

The bright red rises less on Saturday The two of them were chatting and joking on the Gong class road. Halfway through, they stopped in front of a rubbish bin and scratched their heads, asking: "Red class?" Trash can look! Didn't Ming watch it? The piles of garbage are thrown outside the mouth of the trash can. Half a banana peel is hung outside the door, and it smells bad! Where to throw true civilization, you need to take the next step to throw in civilization! Hong said angrily

Throw it in tomorrow! Hong pointed at Ming and said, man, hurry up and agree! Ming Cao Cao turned around and ran to Hong and said to himself: This guy is so unloyal to pick me up. He picked up the rubbish and said to dry it. He bent down and slowly moved his hands and feet to move the trash can. He bent down to pick it up and put it in the trash can. He ran to the toilet to wash it off... I want to avoid the smell of garbage and want to participate. Hong thought: To be truly civilized when throwing garbage, you have to put your hand into the trash can and put some garbage into the trash can before throwing it away!

Ming ran away trying to figure out what to do, but he didn’t have a pen around him to borrow.

Hong dumped all the rubbish into the trash can. Dare you! Ming Bing paid attention to Hong Hong and said: I ran away from the battle! I think I will let the experts throw me away and let the family property rely on the rationale to write slogans to make civilization proud and shame civilization to encourage civilization to take a step forward. So I wrote "civilization gap". Let me post it quickly!

After finishing the red sticker, he extended his thumb to Ming and said: "Ming, I am wrong!" It doesn't matter! Take my class! Hong Ming walks towards Shaogong Road

If civilization is not enough, you need to do something surprising and do something within your own ability: give up your seat, extend your hand, help, throw away garbage...you must step forward to be civilized. Always with you! 5. Write an article about the experience and feelings of spreading chemical fertilizer for the first time

Spreading chemical fertilizer for the first time

Today, my grandpa and I went up the mountain to spread chemical fertilizer on my orange field.

My grandpa and I spent a lot of effort to carry two large bags of fertilizer up the mountain.

When I opened the bag, I saw small grains of fertilizer rolling, really like a group of little angels in white. I thought in my heart: "How can these little trees grow vigorously? Maybe they are a group of little angels who can use magic. As soon as they chant the spell "little trees grow in thin air", the tree will grow quickly. Otherwise, They are a group of warriors who drive out the residents in the soil that are harmful to the big tree, and then bring the residents that are beneficial to the big tree to the roots of the big tree, and let the big tree absorb them... My grandfather began to spread chemical fertilizers in my mind. "Swiss, rustle", the fertilizer fell on the ground and made a crisp sound. I saw my grandpa concentrating on spreading the fertilizer, and I became interested. I simply grabbed a handful from my grandfather's hand and started spreading the fertilizer. , one by one, they came out from the cracks of my fingers. I started to imagine the story of these fertilizers in the soil: when they got into the soil, they found that there were many "channels", which were actually the roots of big trees, and they walked in. I found that this place was actually very big, and there were things like them everywhere. They continued to walk up, and when they were halfway there, a magical gravity sucked them to various parts of the big tree... Today, I experienced the beauty of the countryside. Happy, here, I grow happily! 6. Write an English essay about chemical fertilizers and organic fertilizers, with translation

There is basically no complete article. But I helped you find the coconut. Relevant materials and things required in your essay requirements are also introduced. You can organize it in your own words and write it into an article. The materials are already available. In fact, it is not difficult to write. Think about it and organize it. The materials are as follows: Coconut is a tropical light-loving crop. It grows and develops well under high temperature, rainy, sunny and sea breeze conditions.

For coconuts to bloom, the average annual temperature is required to be above 24-25°C, the temperature difference is small, and there is no frost throughout the year, so that coconuts can bloom and bear fruit normally. The optimal growth temperature is 26-27°C. If the average temperature for one month of the year is 18°C, the yield will drop significantly. If the average temperature is lower than 15°C, it will cause flower and fruit drop and yellowing of the leaves.

The moisture conditions should be more than 1500-2000mm of annual rainfall and evenly distributed. However, in areas with abundant underground water sources or irrigation, the annual rainfall of 600-800mm can also grow well; drought is very important for The impact on coconut yield lasts for 2-3 years. Long-term water accumulation will also affect the growth and yield of coconut. Coconuts are suitable for growing in low-altitude areas. In Hainan Island, my country, they can grow well at altitudes below 150-200m.

The suitable soil is sea alluvial and river bank alluvial soil, followed by sandy loam soil, thirdly gravel soil, and clay soil is the worst. The groundwater level requirement is 1.0-2.5m, and poorly drained clay and swamp soil are not suitable for planting.

In terms of soil fertility, it requires potash-rich fertilizer. The soil pH value can be 5.2-8.3, but 7.0 is the most suitable.

Coconut has strong wind resistance, and strong winds of level 6-7 only have a slight impact on its growth and yield. Category 8-9 typhoons can break off a few leaves and tear small leaves.

Strong typhoons of magnitude 10-12 or above can cause serious harm to coconuts. If the conditions are suitable, coconuts will begin to bear fruit one year after planting. The peak production period is from 15 to 18 years, with a single plant bearing 40-80 fruits, and more than 100 fruits, and the economic life span exceeds 80 years.

The number of leaves produced by coconut trees each year varies with the age of the tree. Before the peak period, it has a tendency to increase with the age of the tree. After the peak period, it decreases slightly, but it can still remain constant. Approximately, there are about 3 leaves per year in the seedling stage, 10-13 leaves in unfruitful saplings, 14-15 leaves in young fruiting trees, and 12-13 leaves in mature trees.

As the plant ages, the number of leaves produced annually decreases accordingly. Within a year, due to seasonal changes, the number of leaves picked each month also changes to a certain extent.

The number of buds produced by young fruit-bearing trees per year is less than that of adult trees, with an average of 10.6 buds for the former and 12 for the latter. In a year, the number of buds is highest in May-June and lowest in November-December.

It takes 3.5 months after the flower buds are pulled out to reveal the inflorescence, which is called flowering. The most blooming months are from July to September, and the most open flower buds have pistils, and the least from November to March of the following year. It takes 12 months for a coconut to mature from fertilization to fruit development.

[Edit this paragraph] Cultivation technology propagation: propagation by seeds. A fully mature coconut will begin to germinate in more than two months as long as there are appropriate temperature and humidity conditions.

Preparatory nursery germination method is widely used in Hainan. Choose a semi-shaded, ventilated, and well-drained environment, remove weeds and tree roots, plow 15-20 cm deep, and dig a ditch slightly wider than the fruit. Place the fruits one by one at an angle of 45° to the bottom of the ditch, and bury them in the soil. to one-half to two-thirds of the fruit.

When the buds are 10-15 cm long, move the buds to a nursery with moderate shade. Pay attention to watering, drainage, weeding and fertilizing. Generally, in about one year, the seedlings can be planted out of the nursery when they are about 1 meter tall.

Management: Strengthen management after protecting and replenishing seedlings. In the early stage after planting, appropriate shade should be provided, and water should be irrigated and moisturized. Missing plants should be replanted in time. Plowing, soil cultivation and interplanting are carried out twice a year, that is, once in November-December with fertilization and once in August-September.

As the plant grows, a large number of aerial roots grow from the trunk and stems to build up the soil and strengthen the tree body. Coconut orchards can be intercropped with short-term crops such as peanuts and beans.

It acts as a living cover and increases the humidity in the garden, which is beneficial to the growth of saplings. Coconut trees need to be fertilized with complete fertilizers, with potassium fertilizer being the most common, followed by nitrogen, phosphorus and chlorine fertilizers, but attention must be paid to balanced fertilization.

When coconut trees are deficient in potassium, the stems will be thin and the leaves will be short. The leaves in the middle of the crown will wilt first, the upper leaves will cluster downward, and the lower leaves will dry up and hang drooping on the trunk. When there is a lack of nitrogen, the young leaves will wilt. Losing green, losing luster, aging of old leaves to varying degrees, and reduced yield; phosphorus deficiency will cause poor root development and excessive rot; chlorine deficiency will affect the size of the coconut fruit, as well as nitrogen absorption and the plant's use of water. Therefore, when fertilizing, organic fertilizer should be used as the main fertilizer, chemical fertilizer as a supplement, and some salt should be applied.

Fertilizer can be applied every year from April to May and November to December, and a fertilizing ditch should be opened 1.5-2 meters away from the base of the tree for better results. If broadcasting is used, the soil should be thoroughly weeded and loosened before fertilizing.

[Edit this paragraph] Coconut varieties Coconut cultivation has a long history, and many types and variants have been formed through long-term natural selection and artificial selection. In recent years, analysis and identification from the perspective of cultivated varieties have shown that there are wild species and cultivated species. The cultivated species can be divided into tall species, dwarf species and hybrid species.

Introduction to high-growing coconut varieties: This variety is currently the most widely planted commercial coconut in the world. The plant is tall and thick, with a trunk circumference of 90-120 cm, and a tree height of more than 20 meters. The base of the stem The enlarged shape is called "Gourd Head". The crown is round, semicircular, and Y-shaped, composed of 30-40 leaves; the leaves are 5-6 meters long.

The fruit is late, blooming and bearing fruit 7-8 years after planting, with an economic life of 60-80 years and a natural life of more than 100 years. Hermaphroditism, different flowering periods, male flowers bloom first, then female flowers, cross-pollination.

All plants are hybrids. The coconut fruit is larger and the quality rate of copra is high.

Copra yield is 1-1.5 tons/hectare. 1. High-species coconuts can be divided into two types according to the color difference of leaves and fruits: red coconut and green coconut.

Tall coconuts can be divided into three types based on fruit shape and volume: large round fruit, medium round fruit, and small round fruit. (1) Large round fruit: fruit circumference 70-90 cm, fruit weight 2.4-3.1 kg, coconut weight 0.49-0.63 kg, coconut water weight 0.74-1.15 kg, coconut shell weight 0.32-0.36 kg, round or oval fruit , oval.

The yield per plant is low. There are very few among the high species.

(2) Medium round fruit: fruit circumference 60-70 cm, fruit weight 1.87-2.0 kg, coconut meat weight 0.39-0.42 kg, coconut weight 0.41-0.45 kg, coconut shell weight 0.24-0.26 Kilogram, fruit round, oval. The yield is medium, and it is the most abundant among high-species coconuts.

(3) Small round fruit: The fruit diameter is 50-60 cm, the fruit weight is 1-1.5 kg, the coconut meat weighs 0.25-0.30 kg, and the coconut water weighs 0.55 kg. The fruit is round or oval.

The yield is high and the quantity is small. 2. Special types of high-species coconuts: (1) Male trees (male and female sterile), also known as super-dominant male trees: their characteristics. 7.

We cannot decide the length of life, but we can change the width of life. We cannot choose the environment, but we can change our own development.

Change is also a kind of beauty. Holding tea in hand, leaning against the window and thinking deeply, the bright moonlight tassels on my window sill, pours down on my desk, illuminates the history book on my desk, and draws my thoughts into the long history of thousands of years.

Who is asking about Zhengfu’s path? Who hates Chen Guang Xiwei? It’s you, Tao Gong, Tao Yuanming. Tired of the secular world in the officialdom, tired of the villain who bends his waist for five buckets of rice, Mr. Tao, you.

You chose to change your development direction. Since you could not adapt to the secular world of officialdom, you changed your direction and chose to retreat from the world. You chose your ambition to see Nanshan leisurely. Mr. Tao, you are wise. Since you cannot choose officialdom, then change the direction of your life, change your own interests, change the scene of your life, and make yourself live a happier, more leisurely, and more contented life.

Change and make yourself live happier.

Who is singing "The water of the Yellow River comes up from the sky and rushes to the sea never to return"? It's you, layman Qinglian. Li Bai, who devoted himself to being an official, was frustrated in officialdom, but you did not persist, but chose to change your life. Life scenes, a place to change your ambitions.

From then on, you indulged in the mountains and rivers, visited the great mountains and rivers of the motherland, let yourself sing loudly, and wrote freely and freely, leaving behind one eternal masterpiece after another. Yes, you chose to change, and that's how you became the poet Li Bai, and how you became free and easy.

We cannot choose the world, we can change our lives and our attitudes. Change and let yourself live more freely.

The fish was swept up by the tsunami, but it was not discouraged. It changed its lifestyle and structure so that its life could continue. Change is also a kind of beauty, allowing its life to continue. continue. We can't choose the weather, but we can change our mood. We can't choose the length, but we can change the width.

It is precisely because of changes that we have the vitality of "the trees are flourishing and the springs are trickling and beginning to flow". It is precisely because of the changes that we have the magnificence of "the water of the Yellow River comes up from the sky and rushes to the sea never to return."

When we can’t choose, let’s try to change. Change is also a kind of beauty. 8. Flower planting composition 350, you should write about the process of planting flowers, watering and fertilizing

1. After finishing my homework today, my mother will plant flowers with me.

In the morning, my mother accompanied me to finish my homework, and we all felt very relaxed. I packed my schoolbag, couldn't wait to open the flower planting supplies I bought, poured the flower medium soil into the flower pot, opened the seeds and fertilizer, and poured them all into the medium soil, ready to water.

"Stop! Don't panic! Let me read the instructions carefully before planting." My mother who was reading the cultivation instructions quickly stopped me.

"Oh, don't put fertilizer first. You have to wait until the seedlings grow up before adding it. When you put the seeds, you have to sow them one by one with the tips downward..." Mom said while reading the instructions. "Oops! Pour it out quickly and find the seeds and fertilizer."

Just do it. I found two pieces of white paper, poured the medium soil, seeds, and fertilizer in the flower pot onto them, and slowly searched for them bit by bit.

After finding the seeds and fertilizer, we started to plant flowers according to the instructions. I planted "sunflowers" and my mother planted "dancing grass". We first fully soaked the medium soil in the flower pot, and then sown seeds: I found two toothpicks and poked small holes about one centimeter deep on the surface of the soil, then put the seeds in one by one, and then gently Cover lightly with soil.

After the sowing was ready, my mother read the instructions again and told me that the dancing grass will be able to dance to music when it grows up. My mother and I are both looking forward to the flowers sprouting, growing up, and having fun with us! 2. My mother-in-law likes to plant flowers the most. In the yard, the flower pots take up almost half of the yard.

In spring, flowers are in full bloom, and my mother-in-law’s house is very beautiful, colorful. This beautiful scenery attracted many neighbors, and they all exclaimed: "This flower is so beautiful."

My mother-in-law narrowed her eyes and looked very proud. I saw that my mother-in-law planted so many flowers, but none of them died. I thought that planting flowers was very simple, and I didn’t take it seriously.

I think the pansies are very beautiful and can look real. So I asked my mother-in-law for a pot, and she had no choice but to agree.

I put the flowers in the yard and watered them every day. After a month, the flowers became a bit rotten, so I hurried to find my mother-in-law. My mother-in-law said, "You watered too much. Once or twice a week is enough. The flowers got too much water, so they were a bit rotten. Fortunately, you called me in time. If you watered them again, the flowers would have been drowned." ”

After saying this, the mother-in-law put the words into the dry mud basin. After a week, the flowers finally recovered.

But I still didn’t believe it was difficult to grow flowers, so I asked for another pot of flowers.

I summed up the experience last time and did what my mother-in-law said. After a month, the flowers were not dead. I was very happy! But after two or three months of planting, I became impatient and poured a lot of water into the flowerpot, thinking that I wouldn't need to water it for a month.

This watering was great, the flowers were watered to death, but I didn’t know the flowers were dead yet. A month passed like this, and the flowers and leaves turned yellow. I felt something was wrong, so I called my mother-in-law again.

When my mother-in-law came and saw the flowers, she said distressedly: "Oh, why did you water the flowers like this again? This time I really can't save myself!" I lowered my head and replied softly. : "I saw that the flowers have been planted for two months and they are growing very well. I just wanted to be lazy, so I watered a lot of water at once. I thought I wouldn't water them for a month, but unexpectedly...". My mother-in-law said earnestly and thoughtfully: "Don't be in a hurry when planting flowers. I have planted so many flowers, and they need to be carefully cultivated for a year or even several years before they bloom.

You need to be patient when planting flowers!" It seems that I underestimated flower planting. difficulty. Doing anything is like planting flowers, you need to be patient to succeed.

Hope this helps. 9. We are going to write an investigation report on chemical fertilizers, please help

1) Nitrogen fertilizer: a chemical fertilizer with nitrogen nutrients as the main component, including ammonium bicarbonate, urea, ammonium, ammonia, Ammonium chloride, ammonium sulfate, etc.

(2) Phosphate fertilizer: a chemical fertilizer with phosphorus nutrients as the main component, including ordinary calcium phosphate, calcium-magnesium phosphate fertilizer, etc. (3) Potassium fertilizer: It is a chemical fertilizer with potassium nutrient element as the main component. Currently, it is not widely used. The main varieties include potassium chloride, potassium sulfate, potassium nitrate, etc.

(4) Compound and mixed fertilizers: namely binary complex and mixed fertilizers containing two kinds of fertilizers and three elements (nitrogen, phosphorus and potassium) and three-dimensional fertilizers containing three elements of nitrogen, phosphorus and potassium. Yuanfu, mixed fertilizer. Among them, mixed fertilizer is being promoted rapidly across the country.

(5) Trace element fertilizers and some medium element fertilizers: the former such as fertilizers containing trace elements such as boron, zinc, iron, molybdenum, manganese, copper, etc., and the latter such as calcium, magnesium, sulfur, etc. fertilizer. (6) Fertilizers that are beneficial to certain crops: such as steel slag silicon fertilizer applied to rice, cobalt fertilizer applied to leguminous crops, and agricultural rare earth applied to sugar cane and fruits.

There are 16 essential nutrients for crops. Except for carbon, hydrogen and oxygen, which are absorbed from the air, the rest require fertilization to varying degrees to meet the needs of normal growth of crops. According to the nutrient requirements of crops, they are divided into macroelement fertilizers, including nitrogen fertilizers, phosphate fertilizers and potash fertilizers; medium element fertilizers, including calcium, magnesium, and sulfur fertilizers; trace element fertilizers, including zinc, boron, manganese, molybdenum, iron, and copper. Fertilizer; in addition, there are some beneficial element fertilizers such as silicon-containing fertilizers, rare earth fertilizers, etc.

At present, the fertilizers sold on the market are mainly nitrogen, phosphorus and potassium fertilizers, and there are many varieties of each fertilizer. The main varieties of nitrogen fertilizers are: urea, ammonium bicarbonate (ammonium bicarbonate), ammonium chloride, ammonium sulfate, ammonium nitrate, calcium nitrate, ammonia, lime nitrogen, etc. are also nitrogen fertilizers, but they are rarely used at present.

Calcium nitrate is both a nitrogen fertilizer and a calcium fertilizer. The main types of phosphate fertilizers are superphosphate (normal calcium), heavy superphosphate (heavy calcium, also known as double-material and triple-material superphosphate), calcium-magnesium phosphate fertilizer. In addition, phosphate rock powder, steel slag phosphate fertilizer, defluorinated phosphate fertilizer, and bone meal are also Phosphate fertilizer, but its current usage is very small and the market is rare.

The main varieties of potassium fertilizers include potassium sulfate, potassium chloride, salt lake potash, kiln ash potash and plant ash. Among them, potassium sulfate and potassium chloride have relatively pure ingredients. Most of the fertilizers circulating in the Chinese market are imported fertilizers. Salt Lake Potash Fertilizer is produced in Qinghai Province, my country. The main ingredient is potash. The ingredients of kiln ash potash fertilizer and plant ash are very complex, and the circulation volume in the market is higher than before. Three types of potassium fertilizers are less.

There are also many varieties of trace element fertilizers. The most commonly used boron fertilizer is borax, zinc fertilizer is zinc sulfate, manganese fertilizer is manganese sulfate, molybdenum fertilizer is ammonium molybdate, copper fertilizer is copper sulfate, and iron fertilizer It is ferrous sulfate and some organic iron complexes. With the deepening of agrochemical research, compound fertilizers are used more and more widely.

Compound fertilizer is a fertilizer that contains two or more components of nitrogen, phosphorus, and potassium at the same time. It is divided into two categories according to the manufacturing method, compound fertilizer and mixed fertilizer.

The most common compound fertilizer is diammonium hydrogen phosphate (ammonium phosphate). In addition, there are ammonium urea phosphate, ammonium nitrate phosphate, ammonium sulfate phosphate, nitrate phosphate fertilizer, diammonium phosphate, potassium nitrate, etc.

When using compound fertilizer, the nutrient ratio needs to be adjusted to adapt to the requirements of different crops and soil. Mixed fertilizers are prepared by flexibly formulating several simple fertilizers into different specifications according to crop and soil conditions, and using a mechanical mixing method. Most of the special fertilizers currently sold on the market belong to this type of fertilizer.

In addition, the various liquid fertilizers and spray fertilizers currently promoted on the market are also mixed with various nutrients and organic ingredients such as amino acids, which also have certain effects on improving crop yield and quality. There are 16 kinds of nutrients that supply plant growth, namely nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, carbon, hydrogen, oxygen, boron, iron, molybdenum, copper, zinc, manganese, and chlorine, of which nitrogen, phosphorus, and potassium are the major elements. , and the rest are trace elements. Although the requirements of plants for these elements vary greatly, they play an equally important role in the growth and development of plants and cannot replace each other.

There are many types of chemical fertilizers, and the following are the main ones commonly used in production. 1. Nitrogen fertilizer Nitrogen is the main element of protein, and protein is the basic substance in the composition of cell protoplasm.

Increased application of nitrogen fertilizer can promote the formation of protein and chlorophyll, make the leaves dark green, increase the leaf area, promote the assimilation of carbon, and help increase yield and improve quality. Nitrogen fertilizers commonly used in production include: ①Ammonium sulfate (ammonium sulfate): white or light brown crystals.

Contains 20 to 21 nitrogen, is easily soluble in water, has low hygroscopicity, and is easy to store and use. Ammonium sulfate is an acidic fertilizer and long-term use will increase the acidity of the soil.

It is best to use it as top dressing, usually 15-20 kilograms per 667 square meters. ②Ammonium bicarbonate (ammonium bicarbonate): white fine crystals, containing 17 nitrogen, has a strong toxic odor, is easily soluble in water, is easily absorbed by crops, and is easily decomposed and volatilized.

It can be used as base fertilizer or top dressing. When top dressing, it should be buried and covered with soil in time to avoid burning the seedlings by ammonia volatilization. ③Urea: White round granular shape, nitrogen content is 46.

Urea is not as effective as ammonium sulfate fertilizer, so top dressing should be applied a few days earlier than ammonium sulfate. Urea is the type with the highest nitrogen content among solid nitrogen fertilizers. Urea is a neutral fertilizer and does not contain accessory ingredients. It will not damage the soil structure even if it is applied year after year.

2. Phosphate fertilizer Phosphorus is an indispensable element for the formation of nuclear proteins, lecithin, etc. Phosphorus can accelerate cell division, accelerate the growth of roots and aboveground parts, promote flower bud differentiation, mature earlier, and improve fruit quality.

Commonly used phosphate fertilizers in production are: ①Superphosphate: It is an off-white or light gray powder, also in granular form. It contains P2O5 12 to 18. It is hygroscopic and corrosive. It is easy to dissolve after being applied to the soil. It is fixed by the soil and reduces the fertilizer efficiency. It can be used as base fertilizer and top dressing. It should be applied concentratedly or mixed with organic fertilizers during application. This can reduce the fixation of phosphorus and thus improve the fertilizer efficiency. It can also be used as top dressing outside the roots so that the crops can absorb it directly.

② Heavy superphosphate (heavy calcium): Containing about 45% P2O5, it is a high-efficiency phosphate fertilizer. The effective method of applying heavy calcium is the same as that of superphosphate. Heavy calcium has a high content of active ingredients and the dosage should be relatively reduced.

3. The nutritional effect of potassium fertilizer can increase the intensity of photosynthesis, promote the formation of starch and sugar in crops, enhance the stress and disease resistance of crops, and also improve the absorption of nitrogen by crops. use. Commonly used potassium fertilizers in production include: ①Potassium chloride: It is a quick-acting potassium fertilizer that is easily soluble in water. It contains about 60 K2O and appears as white, light yellow or purple-red crystals.

Physical.