The Study Of High Product And High Efficiency Of Nitrogen Fertilizer Appiication Model Of Winter Wheat Inhigh-and-mlddle Yielding Fields Of Daiyue District

Nitrogen fertilizer played an important role in increasing wheat yield, but unreasonableuse of nitrogen fertilizer was applied in many of winter wheat fields, which resulted indecreased nitrogen use efficiency and economic benefit, and brought potential threaten toenvironment. dozens of studies have shown that the nitrogen fertilizer could raising outputand improving quality of winter wheat,but it can’t raise or even reduce the yield withapplication of excessive nitrogen fertilizer.it is widely variable in different researchprogrammes about the rate and ratio of base and top-dressing of nitrogen fertizer on winterwheat.that the application of Nitrogen fertilizer at an appropriate rate and ratio of base andtop-dressing is of great importance in planting winter wheat. This thesis deals with the rateand ratio of base and top-dressing of winter wheat production in Daiyue district,and draw up aplan to suitable rate and ratio of base and top-dressing to high-and-middle-yielding fields inwinter wheat of Daiyue district.