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在小麦免耕播种中,通过设置留15～20cm根茬、50%秸秆粉碎还田、全部秸秆粉碎还田3种秸秆处理方式,并与传统的翻耕进行对比,研究不同秸秆覆盖量对播种质量、群体动态、土壤含水量、土壤温度和产量的影响。试验结果表明,随着秸秆覆盖量的增加,免耕小麦的播种质量、越冬能力、群体动态、产量均受到一定影响;免耕播种能提高前期土壤水分,但前期土壤温度偏低;留根茬的免耕处理产量较翻耕略有降低,而50%秸秆覆盖、100%秸秆覆盖的处理较翻耕减产达10.6%、14.1%,差异极显著。
In no-tillage wheat sowing, three kinds of straw treatment methods were set up, including 15 ~ 20cm root stubble, 50% straw crushing and straw returning, and all the straw crushed and returned to field. Compared with traditional tillage, the effects of different straw mulching on sowing Quality, population dynamics, soil moisture content, soil temperature and yield. The results showed that sowing quality, overwintering ability, population dynamics and yield of no-till wheat were all affected with the increase of straw mulching. No-tillage sowing could increase soil moisture in early stage, Of the no-till treatment yield was slightly lower than that of tillage. However, the treatment with 50% straw mulching and 100% straw mulching was 10.6% and 14.1% less than the tillage and the difference was significant.