Establish the concept of integrated management of nutrient resources. Nutrient resources include chemical fertilizers, organic fertilizers, soil nutrients, environmental nutrients, dry and wet dust, gaseous conditions, nutrients that enter the soil and irrigation water, nutrients for biological nitrogen fixation, nutrients in seeds, which cannot be ignored and wasted.

 

Scientifically determine the amount of fertilizer applied. The amount of fertilizer applied is scientifically determined based on climate, target yield, soil nutrient content, and nutrient content of organic fertilizer supply.

 

Apply fertilizer according to the fertilizer requirements of the crop. After the total amount of fertilization is determined, it is necessary to implement phased regulation on the application. The time should be synchronized, the space should be consistent, and comprehensive management should be achieved.

 

At present, the biggest problem in the application of nitrogen fertilizer is that the nutrient is often used as a base fertilizer, or it is customary to apply 50% to 85% of nitrogen fertilizer in the first ten days before transplanting or transplanting for two weeks , leading to the early stage of crop growth. The utilization rate of fertilizer is low, and the fertilizer that is not used flows into the environment to form pollution, and the phenomenon of de-fertilization occurs in the later stage of the crop, which is difficult to produce high.

 

Pay attention to the application of organic fertilizers. Liu Geng, a researcher at the Chinese Academy of Agricultural Sciences and an academician of the Chinese Academy of Engineering, pointed out that China's farmland is not deficient in potassium, but a large amount of organic resources have not been fully reclaimed. The total amount of organic potassium resources in China's straw is about 7.5 million tons. The actual amount of land that can be returned to the field is less than 6 million tons per year. At least 1.5 million tons of resources are lost due to incineration and straw disposal. By making full use of these resources, the demand for potash can be reduced to about 3.5 million tons. Then, with the further increase of potash production capacity in China, the import of potash can be greatly reduced.

 

Promote soil testing and formula fertilization technology. Soil testing and formula fertilization is a major reform in China's fertilization technology. It is the comprehensive use of modern agricultural science and technology achievements, according to crop fertilizer requirements, soil fertility performance and fertilizer effects, under the conditions of organic fertilizer, prenatal introduction of nitrogen, phosphorus, potassium and trace element fertilizers appropriate dosage and proportion, And the corresponding fertilization techniques.