Potassium dihydrogen phosphate is a quick-acting phosphorus-potassium compound fertilizer containing 51.7% phosphorus pentoxide and 34.6% potassium oxide. Its appearance is white crystal, acidic, non-toxic, tasteless, non-volatile, non-deliquescent, stable in nature, soluble in water, and easily absorbed by plants. It is mainly used for soaking, seed dressing and foliar spraying in production.
Soaking seeds and seed dressing: soaking seeds or dressing with potassium dihydrogen phosphate can stimulate the germination of seeds and promote the strong roots and strong roots. The stems are thick and strong and uplifting. Soaking seeds, every 100 kg of seeds, using 200 g of potassium dihydrogen phosphate, 50 kg of water, soaking seeds for 12-16 hours, remove and dry; seed dressing, 200 g of potassium dihydrogen phosphate per 100 kg of seeds, water 10 Kg, mix well with the seeds.
Roots: 0.4-0.5 kg of potassium dihydrogen phosphate per acre, mix well with dry fine soil, add water to make pulp, transplant the roots when transplanting or transplanting.
Foliar spray: This is the most common method. With its foliar spray fertilizer, the fertilizer directly enters the crop body to compensate for the deficiency of phosphorus and potassium nutrients, enhance photosynthesis, prevent premature aging of crops, improve the resistance to low temperature and high temperature, promote the synthesis and accumulation of starch and sugar, and increase the seed setting rate and 1000-grain weight. , reduce empty shells, and achieve the purpose of increasing production.
The spraying method is:
First, master the effective period of spraying. Generally, the peaks of phosphorus and potassium nutrients are absorbed in the crops, such as the booting or heading flowering period of cereal crops such as wheat and rice; the mossy to flowering period of rapeseed; before and after cotton flowering; and the expansion of potato tubers in potato crops. Do not apply in the rainy days, do not apply in the morning dew, do not apply at noon on sunny days; should be sprayed before 10 o'clock in the morning and after 4 o'clock in the afternoon; spray on the cloudy day.
The second is to master the amount and concentration of spray fertilizer. The concentration of fertilizer used in cereals such as rice and wheat is 0.2-0.3%, that is, 100-150 g of potassium dihydrogen phosphate is used, and about 50 kg is mixed with water. It can be fully stirred and dissolved (the following preparation methods are similar); The suitable concentration of cotton is 0.1-0.2%; the potato is 0.2%, the amount of sprayed fertilizer is 50-75 kg, the whole plant is sprayed, uniform, and the walking should not be too fast, so that the front and back of the leaf surface can be more contaminated with water.
Promote the application of chemical fertilizers and pesticides. Potassium dihydrogen phosphate and some nitrogen fertilizers, micro-fertilizers and pesticides can be reasonably matched, and mixed application can save labor, increase fertilizer efficiency and efficacy. In the case of mixed crops with poor growth, nitrogen, phosphorus and potassium, it is generally required that the suitable concentration of urea solution is 1-2%. In the boron-deficient soil and crops that are effective for boron fertilizer, such as cotton, rapeseed, wheat and other crops, the application of potassium dihydrogen phosphate and boron fertilizer is mixed, and the yield increase effect is remarkable. The suitable concentration of boron fertilizer is 0.1-2%, and the amount of boron fertilizer used in mu is generally 50-100 grams. When it is necessary to treat the pests, potassium dihydrogen phosphate can be sprayed with trichlorfon, dimethoate, phoxim and pyrethroid vinegar pesticides to achieve a few results.
Soaking seeds and seed dressing: soaking seeds or dressing with potassium dihydrogen phosphate can stimulate the germination of seeds and promote the strong roots and strong roots. The stems are thick and strong and uplifting. Soaking seeds, every 100 kg of seeds, using 200 g of potassium dihydrogen phosphate, 50 kg of water, soaking seeds for 12-16 hours, remove and dry; seed dressing, 200 g of potassium dihydrogen phosphate per 100 kg of seeds, water 10 Kg, mix well with the seeds.
Roots: 0.4-0.5 kg of potassium dihydrogen phosphate per acre, mix well with dry fine soil, add water to make pulp, transplant the roots when transplanting or transplanting.
Foliar spray: This is the most common method. With its foliar spray fertilizer, the fertilizer directly enters the crop body to compensate for the deficiency of phosphorus and potassium nutrients, enhance photosynthesis, prevent premature aging of crops, improve the resistance to low temperature and high temperature, promote the synthesis and accumulation of starch and sugar, and increase the seed setting rate and 1000-grain weight. , reduce empty shells, and achieve the purpose of increasing production.
The spraying method is:
First, master the effective period of spraying. Generally, the peaks of phosphorus and potassium nutrients are absorbed in the crops, such as the booting or heading flowering period of cereal crops such as wheat and rice; the mossy to flowering period of rapeseed; before and after cotton flowering; and the expansion of potato tubers in potato crops. Do not apply in the rainy days, do not apply in the morning dew, do not apply at noon on sunny days; should be sprayed before 10 o'clock in the morning and after 4 o'clock in the afternoon; spray on the cloudy day.
The second is to master the amount and concentration of spray fertilizer. The concentration of fertilizer used in cereals such as rice and wheat is 0.2-0.3%, that is, 100-150 g of potassium dihydrogen phosphate is used, and about 50 kg is mixed with water. It can be fully stirred and dissolved (the following preparation methods are similar); The suitable concentration of cotton is 0.1-0.2%; the potato is 0.2%, the amount of sprayed fertilizer is 50-75 kg, the whole plant is sprayed, uniform, and the walking should not be too fast, so that the front and back of the leaf surface can be more contaminated with water.
Promote the application of chemical fertilizers and pesticides. Potassium dihydrogen phosphate and some nitrogen fertilizers, micro-fertilizers and pesticides can be reasonably matched, and mixed application can save labor, increase fertilizer efficiency and efficacy. In the case of mixed crops with poor growth, nitrogen, phosphorus and potassium, it is generally required that the suitable concentration of urea solution is 1-2%. In the boron-deficient soil and crops that are effective for boron fertilizer, such as cotton, rapeseed, wheat and other crops, the application of potassium dihydrogen phosphate and boron fertilizer is mixed, and the yield increase effect is remarkable. The suitable concentration of boron fertilizer is 0.1-2%, and the amount of boron fertilizer used in mu is generally 50-100 grams. When it is necessary to treat the pests, potassium dihydrogen phosphate can be sprayed with trichlorfon, dimethoate, phoxim and pyrethroid vinegar pesticides to achieve a few results.
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