How to apply water-soluble fertilizer?

Water-soluble fertilizer takes effect quickly and has enough content! Everyone knows that potassium has the function of expanding fruit, so in this way, all kinds of water-soluble fertilizers with high potassium or even ultra-high potassium will be integrated, and everyone wants to have high yield. Here, I personally think that ultra-high potassium fertilizer (such as 10-5-40) is basically unnecessary except for the last color-changing fertilizer of tomatoes, otherwise sometimes the fruits will become stiff and the plants will grow slowly after use. Direct fertilization (error): Because water-soluble fertilizer is different from general compound fertilizer, it can't be used according to the conventional fertilization method, otherwise it will cause uneven fertilization, burning seedlings, root damage, weak seedlings and so on! Therefore, when applying water-soluble fertilizer, it is necessary to carry out secondary dilution to ensure uniform flushing of fertilizer and improve fertilizer utilization rate. Mixed pesticides (error): For example, when vegetables are deficient in elements or have poor root growth, many farmers often use the method of spraying water-soluble fertilizers to alleviate it. Remind farmers that water-soluble fertilizers should be used alone or mixed with non-alkaline pesticides as far as possible to avoid the reaction and precipitation of metal ions, causing fertilizer damage or leaf phytotoxicity.

There are many kinds of water-soluble fertilizers. You should choose and use according to the nutrient elements needed by plants and the nutrient elements lacking in soil. 1. Choose the best formula according to different growth stages of plants. (1) Seedling stage: Seedling stage is the vegetative growth stage of plants, and it is also the key period of plant growth. In order to make plants grow healthily, it is necessary to increase the content of nitrogen in fertilizer formula and consider the balance of nitrogen, phosphorus, potassium and trace elements to promote the growth of roots, stems and leaves of plants. At the same time, high nitrogen formula and balanced formula can be used alternately. (2) Flower bud differentiation stage and flowering stage: Phosphorus can promote root development and flowering of plants. In order to promote flower bud differentiation, make flower buds robust and increase the number of flowers, it is necessary to increase carbohydrates and improve the C/N ratio. At this stage, it is recommended to use water-soluble fertilizer with high phosphorus formula. (3) Fruiting period of plant growth cycle: At this stage, fertilizers with high phosphorus and potassium content should be applied, and calcium and magnesium should be supplemented at the same time, and15-5-15-7cao-3mgo can be applied, with excessive flowers. At this time, the application of calcium and magnesium fertilizer can improve the quality. For fruit crops, it can also increase the sugar content of the fruit, enhance the disease resistance of the fruit, make the fruit adapt to long-distance transportation and prolong the storage time. 2. According to the physiological characteristics of different plants, apply professional fertilizers to make up for the needs. 3. Fertilize according to the pH value of soil and nutrient solution. The pH value in soil nutrient solution will affect the availability of nutrients and the absorption of nutrients by plants. For example, phosphorus has the highest efficacy in the range of pH 6 to 7, while nutrients such as iron, copper, manganese and zinc have extremely high efficacy below pH 6 and extremely low efficacy above pH 7. At the same time, pH will also affect the absorption of nutrients by roots. Under acidic conditions, the root system mainly absorbs anionic nutrients, while in alkaline environment, the root system has a strong ability to absorb cations. The optimum pH range for most nutrients is 5.5-6.5. 4. According to the different cultivation media, targeted fertilization. Plant cultivation can be divided into two categories: soil cultivation and soilless cultivation. Soilless culture includes sand culture, gravel culture, rock wool culture, peat culture, hydroponic culture and fog culture. In soil cultivation, the soil itself can provide certain nutrients for plants; The core of soilless culture is nutrient solution rather than soil, and almost all the nutrients needed by plants are provided by nutrient solution. Therefore, the formula and dosage of fertilizer used in soil culture and soilless culture are different, so we should choose to use it. 5. Try to promote the absorption of nutrients and prevent antagonism. Antagonism means that although there are enough ions of various elements in the plant growth environment, when the ion content ratio of some elements is unbalanced, the ions of some elements will inhibit the ion absorption of other elements, making plants unable or unable to absorb some elements, resulting in physiological imbalance. It is found that univalent ions in cations can inhibit the absorption of multivalent ions by plants, such as H (hydrogen ion), NH4 (ammonium ion) and K (potassium ion) can inhibit the absorption of Ca2 (calcium ion), Mg2 (magnesium ion) and Fe2 (divalent iron ion) by plants, among which H (hydrogen ion) and NH4 (ammonium ion) can inhibit the absorption of Ca2 (divalent iron ion) among univalent cations. Ca2 (calcium ion) between divalent ions will inhibit plants from absorbing Mg2 (magnesium ion), while Cl- (chloride ion) between anions will inhibit plants from absorbing NO3- (nitrate ion). 6. The water quality is different, and the fertilizer used should be adjusted relatively. Many flower producers ignore the influence of irrigation water quality on fertilizer efficiency. In fact, the composition of water should be the starting point for formulating fertilization plans. For example, for hard water, acid fertilizer should be used to correct the influence of bicarbonate; Soft water is to supplement calcium and magnesium. For example, Huaduoduo has some fertilizer formulas specially designed for soft and hard water to solve the problems caused by different water quality. 7. Fertilization time should be before 10 in the morning and after 4: 00 in the afternoon to avoid fertilization under strong sunlight. It is best to avoid applying fertilizer in rainy days, especially foliar fertilizer, to reduce fertilizer loss. 8. Plant fertilization is the best scheme. Different plants, different kinds of fertilizers, different fertilization periods, base fertilizer (controlled release fertilizer) and topdressing (water-soluble fertilizer) should be applied together, and only targeted fertilization can truly achieve low cost and high efficiency.

Dear friend, I'm glad to see your question. You must want to know the operation method and precautions of water-soluble fertilizer in detail, but it involves some dilution concentrations. Because there are too many products from water-soluble fertilizer manufacturers in the market, I can't give you an accurate multiple. Then I will talk about my own scientific application method of water-soluble fertilizer in Newland, Germany, and the matters needing attention in the application process: 1. Soil irrigation, also called water irrigation, is the most widely used in greenhouse planting. Water-soluble fertilizer can be directly dissolved in water to irrigate crop roots. The specific method is to dilute 5kg of German Xinlu water-soluble fertilizer by 1000 times according to the concentration requirements, that is, add clean water to 5 5kg * 1000 = 5000kg, and then directly pour it around the roots of crops with a water ladle or directly flood it, as shown in the following figure: 2. Drip irrigation and drip irrigation are the most effective ways to use water-soluble fertilizers. Firstly, the liquid fertilizer is diluted reasonably according to the concentration requirements, and then the liquid fertilizer is added to the drip irrigation equipment for pressure drip irrigation. The water must be clean water (anti-clogging), and the fertilizer must be completely dissolved in water without precipitation, as shown in the following figure. Third, foliar spraying, if the water-soluble fertilizer is mainly trace elements, it can be sprayed, especially the concentration of foliar spraying is diluted. 5 kg of water is diluted to 600- 1000 times, and then the solution is added to the sprayer. It is required that the atomization effect of spraying equipment must be good to improve the leaf surface absorption rate. It is required to focus on the back of the blade in the spraying method, because there are more pores on the back of the blade than on the front, as shown in the following figure: Note 1. It is best to choose the best time to wash leaves and spray water in the morning and evening to reduce high temperature evaporation and improve fertilizer utilization rate. 2. Keep the water-soluble fertilizer in a cool, ventilated and dry place as much as possible to prevent it from getting wet.

Usage of water-soluble fertilizer: autumn or spring base fertilizer 15-20k g/ mu: fertilizer: water = 1kg: 100kg. Spraying topdressing15-20kg/mu before furrow or cultivated land (once a year). Fertilizer: water =1kg:100-150kg. Ditching and fertilization. The fruit expansion period of fertilization is 6-8 kg/mu. Fertilizer: water = 1kg: 300kg. Apply it when watering. The whole growth period of foliar fertilizer1-2kg/mu/fertilizer: water = 1 kg: 500-800kg. Foliar spraying. Description ☆ Recommended dosage can be adjusted according to soil quality and crop conditions. Because of the high concentration of the product, the fertilizer efficiency can reach more than 240 days at a time. It can also be used with farmyard manure and a small amount of organic fertilizer. The amount of fertilizer applied to cohesive soil should be doubled.

As a quick-acting fertilizer, water-soluble fertilizer usually contains a large number of elements (N, P, K), some of which also contain medium and trace elements, humic acid, amino acids and other nutrients, and there are water-soluble dosage forms such as aqua, granules and powder. Usually, the utilization rate of drip irrigation after adding water is relatively high. If it is horse racing water or irrigation, it will be wasted. Some water can also be sprayed on the leaves, but it should be used with caution to avoid fertilizer damage. for reference only