The area of ​​sandy soil in the downtown area accounts for 50% of the cultivated area in the whole area. Every year in the harvest season, the wheat in the sandy area shows insufficient grain, and the yield of some fields is unsatisfactory. The key reason is that the fertilization is unscientific. The main reason is that the fertilization in the early stage is large and growing. Better, but less fertilization in the middle and late periods, the fertility can not keep up. Sandy sand has high sand content, good permeability, rapid change of soil temperature, easy decomposition of organic fertilizer applied to the soil, resulting in low soil organic matter content, combined with less soil aggregate structure and poor fertility conservation. Therefore, in the application of fertilizers to grasp a reasonable method of fertilization, so as not to cause the crop due to lack of fat and premature aging.
When planting wheat, fertilizer should pay attention to five points: First, organic fertilizer should be added to increase soil organic matter content; Second, it is appropriate to use cow manure or other cold or semi-ripe organic fertilizer as base fertilizer to improve soil conservation. Fertilizer storage capacity; Third, topdressing grasp "a small number of times" principle, in order to reduce nutrient losses and improve fertilizer utilization; Fourth, in the middle and later period, topdressing nitrogen fertilizer, the whole growth period to take "V" fertilization method, so that It can prevent premature decline due to defertilization and lead to a reduction in yield. Fifthly, it uses extra-root topdressing to compensate for the lack of topdressing in the soil and the decline in root absorption capacity.
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