农业资源与环境学报Issue(3)：279-284,6.DOI:10.13254/j.jare.2014.0012
秸秆还田下氮肥用量对玉米产量及土壤无机氮的影响
Effect of Different Application Rate of Nitrogen Fertilizer Under Straw Return on Maize Yield and Inorganic Nitrogen Accumulation
摘要
Abstract
We investigated the influences of different nitrogen fertilizer rate on maize production, nitrogen use efficiency and soil nitrate ni-trogen at straw return farmland for two years. The results showed that maize production increased with the increment of nitrogen fertilizer. The maize production was the highest at 216 kg·hm-2(N216)of nitrogen use and began to decrease when the amount of nitrogen use was beyond 216 kg·hm-2. There were significant interannual differences on maize production in the same treatment. The maize production in 2010 in-creased 0.69%~4.75%compared with that in 2009. Nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen harvest index im-proved with the year of straw return. The highest nitrate nitrogen accumulation was found in the treatment of 240 kg·hm-2(N240)in 0~100 cm soil layer. Soil nitrate content increased with the depth of soil. This may potentially increased the risk of nitrate pollution on shallow ground-water. Compared with N240, the nitrate nitrogen accumulation of N168(168 kg·hm-2), N192(192 kg·hm-2)and N216(216 kg·hm-2)were e-qually reduced by respectively 39.87%, 35.84%and 29.38%in 0~100 cm soil layer. Considering the maize production, nitrogen use efficien-cy and ecological environmental benefits, the optimum amount of nitrogen use should be 200 kg·hm-2.关键词
秸秆还田/玉米产量/氮肥利用率/无机氮Key words
straw incorporation/maize yield/nitrogen fertilizer use efficiency/inorganic nitrogen分类
农业科技引用本文复制引用
张鑫,隋世江,刘慧颖,安景文..秸秆还田下氮肥用量对玉米产量及土壤无机氮的影响[J].农业资源与环境学报,2014,(3):279-284,6.基金项目
公益性行业科研专项（201103039）；“十二五”农村领域国家科技计划课题 （）
