In order to improve the utilization efficiency of fertilizer nutrient resources, promote the sustainable development of green agriculture, and strengthen the scientific fertilization guidance for the main crops in autumn and winter, the recent Agricultural and Rural Department Plantation Management Department, the National Agricultural Technology Extension Service Center, and the Agricultural and Rural Ministry of Science and Fertilization Guidance Expert Group Formulate the Guiding Opinions on Scientific Fertilization of Main Crops in Autumn and Winter of 2018. Among them, the fertilization proposals for winter wheat are as follows:
For the North China Plain and the Guanzhong Plain irrigated area, the excessive application of nitrogen fertilizer in winter wheat is common, the ratio of nitrogen, phosphorus and potassium nutrients is unbalanced, the amount of base fertilizer is high, the area of ​​one-time fertilization is increasing, the supply of nitrogen fertilizer is insufficient in the later stage, and the deficiency of trace elements such as sulfur, zinc and boron Occasionally, the problem of shallow soil ploughing, poor water retention and fertilizer retention, and the following fertilization principles are proposed: First, according to the results of soil testing and formula fertilization, the amount of nitrogen and phosphorus fertilizer is appropriately reduced. Second, the nitrogen fertilizer should be applied in different stages. According to the soil fertility and the characteristics of wheat varieties, the proportion of application in the middle and late growth stages should be appropriately increased to maintain the balance of nutrient supply during the whole growth period. Third, according to the soil fertility conditions, the application of phosphorus and potassium fertilizers. Fourth, straw smashing and returning to the field, adding organic fertilizer, promoting organic and inorganic cooperation, and improving soil water retention and fertilizer retention capacity. 5. Pay attention to the application of trace elements in sulfur, zinc, boron and manganese. 6. For soils with acidification, salinization and compaction, it is necessary to improve the soil through scientific fertilization and tillage measures.
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