How many days after potash application?

As a large number of elements in plants, nitrogen, phosphorus and potassium play an irreplaceable role in the growth process of plants. To say the speed of plant absorption, the general order is nitrogen fertilizer-potassium fertilizer-phosphorus fertilizer.

Let's talk about the fertilizer efficiency of NPK.

1, the quick-acting nitrogen fertilizer we often say is actually used in ammonium bicarbonate, which is really suitable. It can take effect on the same day, and the validity period of fertilizer is generally around 15 days. Ammonium chloride: effective in 3 days, the validity period of fertilizer is about 25 days, and the crops are easy to be fertilized in the later stage. The validity period of ammonium sulfate is about 50 days. Urea: Generally, it takes 7 10 days to take effect, and the effective period of fertilizer is 45 60 days; The effective period of long-acting urea can be extended by more than 1 times, reaching 1 10 130 days; Polypeptide urea has shorter duration and faster fertilizer efficiency than conventional urea.

2. Phosphate fertilizer

Phosphate fertilizer has a long period of validity. Phosphorus applied to soil can be slowly absorbed and utilized by crops in the following years even if it is not absorbed and utilized by plants in that year, and phosphate fertilizer shows a good after-effect effect. After phosphate fertilizer is applied to soil, the utilization rate of phosphate fertilizer in season is not high because of the fixation of phosphorus in soil and the poor fluidity of phosphorus in soil, and the after-effect is less than 25%. The unused part remains in the soil in different forms and accumulates continuously. The results of long-term positioning tests at home and abroad show that phosphate fertilizer is a slow-release fertilizer, and the residual phosphorus in the soil will be released slowly for the next crop to absorb and utilize. The apparent utilization rate of phosphate fertilizer, including residual effect, can reach 40.8% to 53.0%, and the cumulative crop recovery rate for many years can reach 50% to 90%. The following are the expiration dates of different phosphate fertilizers: Diammonium phosphate is the most common compound fertilizer, mainly nitrogen phosphate fertilizer. As a base fertilizer, the general fertilizer efficiency is about 120 days. After application, under suitable conditions such as moisture and temperature, the best fertilizer effect is about 50 days.

3. Potash fertilizer

The validity period of potassium fertilizer is just between nitrogen fertilizer and phosphorus fertilizer, and its periodic effect is longer. Potassium sulfate: common potassium sulfate has a short effective period and is used as base fertilizer. Generally, the effective period of fertilizer is about 60 days. If it is potassium sulfate slow-release fertilizer, the fertilizer effect period is longer, which can ensure the nutrient demand of crops throughout the growth period. Potassium nitrate: The validity period of potassium in potassium nitrate is generally 40-60 days. Potassium dihydrogen phosphate: the validity period of spraying potassium dihydrogen phosphate on leaves is 10 15 days, and the validity period of applying potassium dihydrogen phosphate on soil is generally 40 60 days.

Farmers often use fertilizers. They know which fertilizers are quick-acting and which fertilizers are slow-acting. However, they may not care too much about which fertilizers are effective after a few days of application and how long they can last. Sometimes I go into a misunderstanding that quick-acting fertilizer is good fertilizer, which is really learned. Let's give you a popular science:

List of fertilizer validity period

Generally speaking, the validity period of chemical fertilizer products is as follows (for reference only):

Ammonium bicarbonate: effective on the same day, and the validity period of fertilizer is 15 days;

Ammonium chloride: effective for 3 days, effective for 25 days, and released later;

Urea: valid for 7 days, and fertilizer valid for 45 days;

Compound fertilizer:/kloc-takes effect on 0/0, and the fertilizer is valid for 90 days;

Bio-fertilizer: Generally, it takes about one month to take effect, and the effect of crops with long growth cycle is not obvious, but the fertilizer effect can last for 6-8 months;

Hormones: they don't have much nutrition, so they don't have much practical help to increase production;

Fertilizer needs long-term supply, and it is best to apply it in proportion according to the physiological characteristics of crops at all stages. There is no need to blindly pursue quick results.

Is quick-acting fertilizer a good fertilizer?

At present, some unscrupulous manufacturers, grasping the psychology of farmers' friends, want to get immediate results, so they add excessive hormones to irrigation fertilizers to reduce the contents of nutrients such as nitrogen, phosphorus and potassium. This hormone fertilizer will take effect 1 2 days after irrigation, and the surface effect is very obvious. For example, leaves and stems grow fast, fruits swell fast and bear more fruits. Farmers' friends think this fertilizer takes effect quickly.

If hormone fertilizer is used continuously for 2-3 times, it will be found that the leaves at the bottom of the plant turn yellow, the stems become thinner and the fruits grow poorly. The normal growth period of vegetables and fruit picking period are seriously shortened, which is the result of hormone abuse. After the application of this kind of hormone, it will often cause problems such as vigorous crop growth, poor flower bud differentiation and premature aging, but it will reduce the overall yield.

Nitrogen, phosphorus and potassium fertilizer are called "macro-element fertilizers" by farmers in agricultural production. Different from nitrogen fertilizer, potassium fertilizer has an immediate effect, and changes and effects can be seen from the leaves. The role of potassium fertilizer is reflected in the resistance and immunity, and in the yield and quality of agricultural products. Potassium fertilizer can make the stalks of crops stout and lodging-resistant, increase the 1000-grain weight and grain weight per ear of agricultural products, make agricultural products full and improve their quality. Therefore, the effective days of potash fertilizer are reflected in disasters, phytotoxicity and diseases and insect pests. Potash fields can resist viruses, extreme weather, lodging and phytotoxicity. If potash fertilizer wants to see the effect, it may have to wait until the crops are mature. In this respect, it takes 50 days to more than 60 days after applying potassium fertilizer. Potassium fertilizer is widely used, all crops need potassium fertilizer, and there are many varieties of potassium fertilizer, so different crops should choose different potassium fertilizers to use. Plant ash, potassium sulfate, potassium dihydrogen phosphate and potassium chloride are the main agricultural products. High concentration potassium dihydrogen phosphate is suitable for foliar fertilizer spraying, plant ash is suitable for base fertilizer and topdressing, and potassium chloride, potassium sulfate and potassium nitrate are suitable for topdressing.

Potash plays a vital role in ensuring world food security. When in use, potassium dihydrogen phosphate as foliar fertilizer can be sprayed many times. Potassium chloride belongs to potassium salt, and excessive use will cause soil hardening and soil erosion. Plant ash is an organic potash fertilizer, and its use is not limited by usage and dosage. After applying potassium fertilizer, crops will absorb it quickly, but it will not be as immediate as nitrogen fertilizer, and the leaves will become lush, but it will be reflected in stress resistance and immunity, as well as the quality and yield of agricultural products. So many farmers think that potash fertilizer can't see the effect, which is a wrong understanding. Potassium fertilizer is mostly used for topdressing, and it is used in the middle and late period of crop growth to promote crop cycle metabolism and respiratory photosynthesis. It has obvious effects on flowering, fruit setting, flowering, pollination and fruiting of crops. Potassium fertilizer is a big element fertilizer that can't be ignored in agricultural production.

Therefore, you can't see the effect for a few days after applying potassium fertilizer, and you can't see the effect until the crops are harvested. The effect is that the yield is increased by more than 10% compared with the control field, the effect is that the taste is better and the nutrition is richer than the control field, and the effect is that the price is higher than the control field!

This question can be answered perfectly in one or two sentences. After applying potassium fertilizer, like other fertilizers, there is no water to dilute and dissolve, which is equivalent to waste.

Nutrients in soil must be dissolved in water before they can be absorbed, transported and utilized by plants. It can take effect in a few days after applying potassium fertilizer. The key to the problem lies in the degree of water dilution and dissolution, which determines the effective time after potassium fertilizer application.

Flush after applying potassium fertilizer, and it will take effect in one week.

Potassium fertilizer is one of the three elements needed by plants and plays an indispensable role in plant growth and development. The most obvious function of potassium fertilizer is to improve the quality of plant fruits and increase the stress resistance of plants.

How many days does potash fertilizer take effect?

Generally speaking, it is almost impossible for many fertilizers to see the fertilizer effect on the same day. For example, urea takes effect in about seven days, compound fertilizer takes effect in about two weeks, and biological fertilizer takes effect in about one month. However, it usually takes a week, that is, about seven days, for potash fertilizer to have obvious effects.

Pre-experiment on fertilizer efficiency of potassium fertilizer for apple trees

In the past, when our family planted apples, August was the expansion period of apples every year, and it was also the time when the fruits needed potassium fertilizer most. I have compared the fruit trees in our family before. The appearance of fruit trees watered with plant ash is much better than that of apples without fertilization. Although there is no difference in taste, it can basically prove that the effective time of potash fertilizer is only one week.

Speaking of potash fertilizer, it is widely used in agriculture, even one of the indispensable fertilizers for many crops. Potassium fertilizer has many benefits, such as promoting the production of sugar in fruit, helping the tuber of fruit to swell, enhancing the stress resistance of crops and improving the quality of fruit. It is precisely because of the many benefits of potash fertilizer that we can't ignore the application of potash fertilizer in agricultural plants.

For example, when will potash fertilizer begin to play its role? Here can be divided into two different forms of potassium fertilizer, one is foliar fertilizer and the other is root fertilizer.

Among the potash fertilizers, potassium dihydrogen phosphate is the main foliar fertilizer often applied. Although it is not a single potassium fertilizer, when we supplement potassium to crops, we often directly apply 0.2-0.3% potassium dihydrogen phosphate. The use of foliar fertilizer is known to be fast and accurate, that is to say, foliar fertilizer is used to make crops absorb and utilize quickly and supplement the required elements in a targeted manner. In this way, potassium dihydrogen phosphate as foliar fertilizer can absorb potassium more effectively, which takes about 3-5 days.

Potassium sulfate and potassium chloride compound fertilizers, as common root fertilizers, are commonly used potassium fertilizers. Watermelon and strawberry are grown at home, and potassium sulfate compound fertilizer is often applied. Potassium sulfate compound fertilizer is generally used as base fertilizer and topdressing, but it is generally applied in furrow or hole when topdressing. No matter which application method, when we apply potassium sulfate compound fertilizer, we will directly spread the fertilizer in the soil, as close as possible to the roots of crops.

The reason is that after potassium fertilizer is applied to the soil, the movement distance of potassium in the soil is very short, so in order to make the root system absorb potassium quickly, on the one hand, we try to apply potassium fertilizer near the root system, on the other hand, we can water it after application, so as to facilitate the flow of fertilizer and be quickly absorbed and utilized by the root system. As a root fertilizer, potassium fertilizer takes effect slowly after application, which is estimated to be about 7- 10 days.

How many days after potash application?

Potassium fertilizer is one of the "three fertilizers" for crop growth, and it is also an essential fertilizer in the middle and late stage of crop planting. Especially in the northern region, due to the different soil structure, potash fertilizer is needed to supplement nutrients when planting crops such as soybeans, sesame, tobacco, peanuts, corn, sweet potatoes, fruits and cash crops.

Potash fertilizer is generally used for "topdressing" and must not be used as base fertilizer! When topdressing crops, fertilization methods are "throwing" or "pressing ditches" and "digging pits". The role of potash fertilizer mainly has three aspects: First, it can increase the yield. In the middle and late growth period of peanuts and beans, if it is really expanding, it needs enough potash fertilizer supply, which has obvious effect on increasing the yield. Little Heezen went deep into the field and did a small experiment. The yield difference between peanut with and without potassium application at the swelling stage is about 65438 00%.

Second, improve quality. After the application of potassium fertilizer, the roots of crops absorb nutrients from the soil, promote nutrient supply, and have the effect of strong stems. For example, in the middle and late stage of maize growth, application can prevent maize from lodging.

Third, promote crops and plants to enhance metabolism and photosynthesis, promote ATP synthesis and provide energy for carbon dioxide fixation. Simply put, it is to regulate the absorption of carbohydrates and nitrogen by crops, so that the water and nutrients of crop plants can be transported quickly and the seedlings can be prevented from dying and wilting.

Take the application of soybean as an example: the application of potash fertilizer can include compound fertilizer, potassium sulfate, potassium nitrate, special potash fertilizer and so on. The fertilizer efficiency cycle of general compound fertilizer is more than 45 days, and the effect of special fertilizer is basically the same. The effect of crops after applying potassium fertilizer is not obvious for a period of time, but when soybeans are harvested, it will be known that soybean plants with potassium fertilizer are heavy and soybean particles are full! The data show that the yield of ordinary soybean is 350 kg per mu, but the application of potassium fertilizer may reach more than 400 kg, improving the quality and increasing the yield by more than 10%.

For example, peanuts, corn, sweet potatoes and fruit trees begin to play a role in 7- 10 days after fertilization! Even longer, and the application of nitrogen fertilizer, phosphorus fertilizer and other effective time is early, such as "immediate"

Potassium fertilizer is one of the indispensable elements in the growing period of various crops. Today, it is only said that potassium fertilizer has the most obvious effect in the middle period of crop growth. Which crops need potassium most? Through long-term planting experience, we come to the conclusion that potatoes and sweet potatoes need potassium most. What methods can we use to meet the demand of potassium for these two crops? The oldest and most stupid way is to apply more farmyard manure, about 3000-5000 kg per mu. When potatoes and sweet potatoes grow to one meter, they should be supplemented with fertilizers with high potassium content, which will be combined with organic fertilizers in the soil to promote the growth of fruit buds. I sprayed the beans with potassium dihydrogen phosphate foliar fertilizer two or three times in the most convenient and effective way. I have planted five or six acres of potatoes with this fertilizer in recent years, which has increased the yield. it wont hurt you to try it

Seven days later.