【摘要】 长期定位试验研究不同施肥措施对旱地玉米土壤(NO3--N)累积的影响结果表明,不同施肥和秸秆还田措施可不同程度造成0~500cm土层NO3--N的累积,且对0~300cm土层NO3--N的累积影响较大。秋施肥秸秆覆盖还田处理产量最高,且土壤NO3--N累积量较低,所造成的环境风险也小,为我国北方半湿润偏旱区适宜施肥措施。更多还原

【Abstract】 The effects of different fertilizer application countermeasures on the soil NO^-₃-N accumulation in dryland maize were studied by the long-term located experiments.The results show that the different fertilizer application（countermeasures） can cause the soil NO^-₃-N accumulation in 0～500cm soil body in some degrees and have more effect on（0～300）cm soil layer.The treatment of autumn fertilization with stubble mulch return is a perfect pattern for obtaining（higher） yield of corn in the semi-damp and drought areas of North China,can lower the soil NO^-₃-N accumulation and（cause） smaller danger to the environment.更多还原