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为寻求适宜当地生产和生态环境的最适耕作措施和秸秆还田方式组合,通过开展2年(2009-2011年)田间试验,研究不同耕作措施和秸秆还田对稻麦轮作农田土壤养分、微生物量碳氮及土壤酶活性的影响。结果表明:无论是翻耕还是旋耕,秸秆还田条件下的土壤养分含量均不同程度地高于秸秆不还田,除速效钾外,差异均达显著水平;两季秸秆均还田处理土壤微生物量碳含量均显著高于两季秸秆均不还田;除旋耕秸秆两季均还田外,旋耕麦季稻秸还田处理土壤微生物量氮含量显著高于其他各处理;与翻耕秸秆不还田相比,翻耕两季秸秆均还田和旋耕两季秸秆均还田均显著提高了土壤脲酶和蔗糖酶活性,其中脲酶提高了10.96%和9.72%,蔗糖酶提高了30.36%和17.87%。
In order to find the best combination of tillage practices and straw returning methods suitable for local production and ecological environment, two years (2009-2011) field trials were conducted to study the effects of different tillage practices and straw returning on soil nutrients, Quantity of carbon and nitrogen and soil enzyme activities. The results showed that the contents of soil nutrients under straw mulching and returning to straw were higher than those under straw mulching and straw mulching, respectively, except for available potassium, the differences were significant Microbial biomass carbon content was significantly higher than the two seasons of straw did not return to field; except rotary tillage straw two field are field, rotary tillage wheat straw rice field treatment of soil microbial biomass nitrogen content was significantly higher than other treatments; Compared with straw returning to straw returning, both straw return to straw and rotary straw returning to straw in both seasons significantly increased soil urease and invertase activities, of which urease increased by 10.96% and 9.72%, sucrase increased 30.36% and 17.87% respectively.