Highly efficient phosphorus application

Phosphorus is the main component of crop cell nucleus and protein. It can promote the accumulation and transformation of nutrients in crops. Accelerate cell division and genital development. Increasing the application of phosphate fertilizer, the first can promote the development of crop roots and enhance the absorption capacity; the second can improve the ability of crops to resist drought and cold; the third can promote grain fullness, improve yield and quality; the fourth can prevent crops from growing up, early maturity . However, the phosphate fertilizer has three characteristics: that is, the mobility is small, the fixation is large, and the temperature is strong. Therefore, the utilization rate of phosphate fertilizer is not high, generally 10-20%. In order to improve the efficiency of phosphate fertilizer and achieve the goal of small investment and great effect, several methods for applying phosphate fertilizer are introduced.

First, concentrated application: Practice has proved that "a large piece of fertilization is not as good as a line." Because the phosphorus molecules have very low fluidity in the soil, the diffusion range near the root of the plant is only 0.5mm, the penetration depth is only 0.5cm, only 1% of the diffusion range of nitrogen and potassium, the phosphorus is absorbed by the crop, and the roots are intercepted. The phosphorus seedlings that are slightly farther from the roots are not absorbed and utilized, forming a "far water is not near to drink." Therefore, the phosphate fertilizer is applied after the application, trenching or tilling. In the middle layer of the sputum, the phosphate fertilizer can be evenly distributed in the dense layer of the roots, so that it is concentrated in the vicinity of the seed, that is, reducing the amount of fertilizer, and facilitating the absorption and utilization of the wheat, and promoting the robust growth of the seedling.

Second, stratified application: Because there are two peaks of phosphorus demand in wheat during the whole life, the first is the seedling stage, the phosphorus uptake accounts for about 10% of the total phosphorus, so a small amount of phosphate fertilizer is used as seed fertilizer, and calcium magnesium phosphate fertilizer is used per mu. 10 kg directly mixed with wet seeds, can make roots early in the seedling stage, the root system is developed, early tillering, strong, forming strong seedlings, set up a high-yield shelf. The other is the booting to flowering stage, which can accelerate the operation of nutrients in the middle and late stages, increase the seed setting rate of wheat, accelerate the filling rate, and achieve more grain, grain weight, early maturity and high yield.

3. Mixed with organic fertilizer: Phosphate fertilizer and organic fertilizer are mixed and applied, and the phosphate fertilizer will be wrapped by organic fertilizer to reduce the chance of direct contact between phosphate fertilizer and soil, thus reducing the metal ions such as calcium, iron and aluminum in the soil. The fixation of phosphorus inhibits the conversion of available phosphorus to difficult-to-contain phosphorus and improves the effectiveness of phosphate fertilizer on crops.
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