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通过盆栽和大田试验探讨了油菜秸秆还田对水稻产量及群体质量的影响,结果表明,在油菜秸秆还田时,随秸秆埋深的增加,产量下降,以秸秆埋深6 cm的产量最高。在秸秆全量还田条件下,产量随着施氮量的增加先升后降,以总施氮量为225kg/hm2的处理最高。在油菜秸秆全量还田条件下,当水稻全生育期总施纯氮225 kg/hm2时,以基肥、分蘖肥、穗肥比例为5∶2∶3的氮肥运筹模式的处理群体结构较为合理、产量最高。
The effects of rapeseed straw returning to field on the yield and population quality of rice were discussed through pot experiment and field experiment. The results showed that with the increase of burial depth, the yield of rapeseed straw decreased, and the yield of straw with depth of 6 cm was the highest. Under the condition of straw returning to full field, the yield increased first and then decreased with the increase of nitrogen application, and the highest total nitrogen was 225 kg / hm2. Under the conditions of total rapeseed stalks returned to the field, when the total nitrogen application was 225 kg / hm2 during the whole growth period of rice, the population structure of nitrogenous fertilizer operation mode with base fertilizer, tillering fertilizer and panicle fertilizer ratio of 5: 2: 3 was more reasonable, The highest yield