Controlling the amount of nitrogen fertilizer: At present, the nitrogen fertilizer use of various crops in Chongming County is generally high, such as 8-10% of rice, 5~8% of wheat, and nitrogen utilization rate of 14.5%, resulting in greater waste and environmental pollution. In the production practice, the reasonable amount of nitrogen fertilizer should be determined according to the nitrogen supply capacity of the soil, the fertilizer requirement of the crop and the target yield, and the base fertilizer, the proportion of topdressing and the application period should be properly grasped, and combined with irrigation and farming measures. Such as increasing green manure, increasing the application of organic fertilizer, and vigorously promoting straw returning to the field.
Appropriate deep application: deep application of nitrogen fertilizer can reduce the direct evaporation of fertilizer, loss of water, nitrification and denitrification. Deep fertilization (such as acupoint application, ditch application, etc.) is also conducive to root development, deep rooting, and expansion of nutrient area.
Combined with other fertilizers: The application of nitrogen fertilizer combined with organic fertilizer plays an important role in capturing high yield and stable yield of crops and reducing costs. Nitrogen fertilizer combined with phosphate fertilizer can increase the utilization rate of nitrogen and phosphorus nutrients, especially for soils with low soil fertility, and the application effect of nitrogen and phosphorus fertilizers is better. In soils with insufficient potassium content, nitrogen fertilizer combined with potassium fertilizer can increase the effect of nitrogen fertilizer.
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