甘肃省氮肥利用率现状及影响因素分析

hrough the main agricultural areas of Gansu Province, the main planting crops using nitrogen status of the investigation, the results of the analysis show that : Gansu Province different major agricultural areas cultivated crops nitrogen utilization of a downward trend; Nitrogen species, acres of fertilization, the use of different methods, different fertilization depth, nitrogen, phosphorus, potassium elements with the use of plastic cover technology may affect the efficiency of nitrogen fertilizer use, the number of Gansu Province unreasonable arrangement is the main cause of nitrogen fertilizer decreased utilization. To improve the utilization of nitrogen fertilizer, increase crop yield, we should advocate a reasonable