增施有机肥，严格控制氮肥用量，减少化肥投入量。 一方面，推广测土施肥技

Increase the application of organic fertilizers, strictly control the amount of nitrogen fertilizers, and reduce the input of chemical fertilizers. On the one hand, popularize soil testing and fertilization techniques. According to the soil fertilization capacity and the law of fertilizer demand, determine the content of nitrogen, phosphorus, potassium, medium and trace elements reasonably, and increase the application of calcium and magnesium fertilizers; followed by tracking the changes of soil nutrients during the crop growth cycle, timely adjusting the amount of top dressing and The proportion of nutrients to avoid residues such as excessive nitrogen fertilizer in the soil; on the other hand, vigorously promote the technology of extra-root fertilizer, water-soluble fertilizers are not fertilized through the soil, but sprayed on the leaves, shoots and stems of crops to provide plants Nutrients, there will be no fertilizer residue and loss in the soil, solving the problem of excessive fertilization. <br>Scientifically select fertilizer varieties and replace acidic fertilizers such as superphosphate with alkaline fertilizers such as calcium magnesium phosphate. Potassium supplementation should promote the use of organic fertilizers such as grass ash, popularized controlled-release fertilizers, and improve fertilizer utilization. Controlled-release fertilizer has the characteristics of one-time fertilization and targeted distribution of nutrients. It can control the release of nutrients according to the needs of crop growth, reduce fertilizer use, improve fertilizer efficiency, promote yield growth, and improve crop internal quality.

Increase the application of organic fertilizer, strictly control the amount of nitrogen fertilizer, reduce the amount of fertilizer input. On the one hand, the promotion of soil fertilization technology. According to the soil fertilization capacity and the law of fertilizer demand, reasonably determine the content of nitrogen, phosphorus, potassium, medium and trace elements, increase the application of calcium and magnesium fertilizer, followed by tracking the changes of soil nutrients in the crop growth cycle, timely adjust the proportion of fertilizer recovery and nutrients, to avoid excessive nitrogen fertilizer in the soil and other residues; Water-soluble fertilizer is not fertilized through the soil, but sprayed on the leaves, twigs and stems of the crop to provide the plant with the nutrients needed, and there will be no residue or loss of fertilizer in the soil. Solve the problem of excessive fertilization.<br>Scientificselection of fertilizer varieties, calcium perphosphate and other acidic fertilizer replaced with calcium magnesium phosphate fertilizer and other alkaline fertilizer. The supplement of potassium elements should promote the use of organic fertilizers such as grass ash, popularize controlled release fertilizer, and improve fertilizer utilization. Controlled release fertilizer has the characteristics of one-time fertilization, nutrient distribution is more than targeted, can control nutrient release according to crop growth needs, reduce fertilizer consumption, improve fertilizer efficiency, promote yield increase, improve the internal quality of crops

Increase the application of organic fertilizer, strictly control the amount of nitrogen fertilizer, reduce the amount of chemical fertilizer input. On the one hand, soil testing and fertilization technology should be popularized. According to the soil fertilizer supply capacity and fertilizer demand law, reasonably determine the content of nitrogen, phosphorus, potassium, medium and trace elements, and increase the application of calcium and magnesium fertilizer; secondly, track the changes of soil nutrients in the crop growth cycle, timely adjust the amount of Topdressing and nutrient ratio, and avoid residues such as excessive nitrogen in the soil; on the other hand, vigorously promote the technology of topdressing outside the root, Water soluble fertilizer is not fertilized by soil, but sprayed on the leaves, twigs and stems of crops to provide necessary nutrients for plants. There will be no residue and loss of fertilizer in the soil, so as to solve the problem of excessive fertilization.<br>Scientific selection of fertilizer varieties, acid fertilizer such as superphosphate was replaced by alkaline fertilizer such as calcium magnesium phosphate. The supplement of potassium should promote the application of organic fertilizer such as plant ash, popularize controlled-release fertilizer and improve the utilization rate of fertilizer. Controlled release fertilizer has the characteristics of one-time fertilization and strong pertinence of nutrient distribution ratio. It can control nutrient release according to crop growth needs, reduce fertilizer consumption, improve fertilizer efficiency, promote yield increase, and improve the internal quality of crops<br>