Based on soil testing and fertilizer field experiments, according to the law of crop demand, soil fertility and fertilizer effect, on the basis of rational use of organic fertilizer, the appropriate proportion and amount of nitrogen, phosphorus, potassium and trace elements, as well as the corresponding application technology (including application time and application method) were proposed.

Bulk element fertilizer

1, the main role of nitrogen {N} fertilizer.

We will increase the total biomass and economic output and improve the nutritional value of agricultural products. It can increase the protein content in seeds and improve the nutritional value of food, and the nitrogen fertilizer occupies a higher proportion than phosphorus {P}, potassium {K} and other fertilizers in increasing the yield of food crops. The application of nitrogen fertilizer combined with phosphorus fertilizer can improve the utilization effect of nitrogen and phosphorus. Especially on less fertile soil. The application of nitrogen and phosphate fertilizer with the best effect, in the effective potassium content of soil, nitrogen and potassium fertilizer with the use, can improve the effect of nitrogen fertilizer.

2, the role of phosphorus {p} fertilizer

Phosphorus is involved in the metabolic processes of biofilm and carbohydrate, nitrogen and fat synthesis, decomposition and operation. Rational use of phosphate fertilizer can improve product quality and accelerate rice production. The tillering of wheat. Promote preferential differentiation, grout and full grain, promote early maturity, and enable melon, jacket vegetables and fruit trees and other crops flower bud differentiation and flowering fruit. It can also improve crop drought resistance, cold resistance and salinity resistance.

Commonly used phosphate fertilizer varieties:

(1) water-soluble phosphorus, mainly including ordinary superphosphate, heavy superphosphate and ammonium phosphate {monoammonium phosphate, diammonium phosphate}. Suitable for all soils and crops, but best used in neutral and calcareous soils.

So it applies to acidic soils.

(3) insoluble phosphorus, such as phosphate rock, bone meal and phosphorous guano. It is only soluble in strong acid but insoluble in water. After it is applied into the soil, the acid in the soil slowly dissolves it and turns it into a form for crops to use. The fertilizer effect is very slow, but the aftereffect is very long.

3, the role of potassium {k} fertilizer

Potassium fertilizer commonly used are potassium sulfate, potassium chloride, potassium nitrate, farmers burning wood waste plant ash.

Potassium fertilizer can regulate cell liquid concentration and cell wall permeability, improve crop resistance to diseases and insect pests, drought and cold resistance, reduce lodging, promote photosynthesis and the formation of edible parts, promote the transfer of sugar and starch, promote the activation of various enzymes, improve protein content. Improve crop quality and storage performance. Potassium {k} is not only a "functional element", but also a "quality element", "potassium is like a pesticide", "potassium to the disease".

Microelement fertilizer

Most trace elements in crops are enzymes, components or activators of coenzymes, which play an important role in promoting and regulating the synthesis, photosynthesis and metabolism of chlorophyll and protein, as well as the absorption and utilization of nutrients such as nitrogen, phosphorus and potassium.

Compound fertilizer material

Compound fertilizer is now known as the new type of water - soluble fertilizer. The new water soluble fertilizer has many elements. The nutrient distribution was reasonable and the fertilizer efficiency and utilization rate were high. The new type of total water soluble fertilizer can be formulated into a series of special fertilizers according to the nutrient status of different types of soil and the fertilizer requirements of crops. Pertinence, effectiveness significantly, the fertilizer utilization ratio and improve the economic efficiency, good physical performance, nutrients complete, promote the soil nutrient balance, the new water soluble fertilizer to soil testing formula fertilization technology popularization, the formula is based on regional crop fertilization formula, a little fat is the concentrated reflection of soil testing the technology of applying fertilizer and materialized carrier. Is to solve the scientific fertilization technology "the last kilometer" the important grasp, optimizes the fertilization structure.