[目的]筛选秸秆还田配施化学氮肥最佳方案.[方法]试验设置7个秸秆还田配施化学氮肥方案,考察不同处理对土壤养分、水稻产量及其结构的影响.[结果]秸秆还田后施纯氮315 kg/hm2时,产量最高,达9 600.90 kg/hm2.[结论]秸秆还田后配施315 kg/hm2氮能满足秸秆腐解与水稻生长的需要,该方案具有广泛的应用价值.%[Objective] To select the best scheme of nitrogen fertilizer application after returning straw to fields.[Method] Seven straw mulching plus nitrogen fertilizer treatments were conducted in the experiment,the effects of different treatments on soil nutrients,rice yield and structure were investigated.[Result] The yield would be the highest and up to 9 600.90 kg/hm2 when pure nitrogen was applied at a concentration of 315 kg/hm2 after straw mulching.[Conclusion] Application of 315 kg/hm2 nitrogen fertilizer after returning straw to fields can meet the needs of straw decomposition and rice growth.
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