论文部分内容阅读
采用传统和免耕两种不同的耕作方式,设置不同的覆盖物(空白、地膜、3 000 kg/hm2秸秆和6 000 kg/hm2秸秆),研究耕作方式和覆盖物对稻田土壤养分的影响。结果表明:稻草覆盖有明显的土壤培肥效应,不仅明显增加了土壤有机质和速效养分含量,且速效养分有在土壤表层富集的趋势,有利于作物的生长发育;地膜覆盖加快了土壤有机质的分解及速效养分的转化和释放,尤其明显增加了速效磷的含量;而免耕与翻耕对土壤培肥的表现不一,有机质的形成和速效钾免耕要优于翻耕,氮、磷的矿化则翻耕要优于免耕。
Two different tillage methods, traditional and no-tillage, were used to set up different coverings (blank, plastic film, 3 000 kg / hm2 straw and 6 000 kg / hm2 straw) to study the effects of tillage and cover on soil nutrients in paddy soil. The results showed that straw mulching had significant effect of soil fertility enhancement, which not only increased the contents of soil organic matter and available nutrients but also accelerated the enrichment of nutrients in the soil surface, which was in favor of the growth and development of crops. Mulching improved soil organic matter In particular, no-tillage and tillage showed different effects on soil fertility, and the formation of organic matter and quick-acting no-tillage were better than tillage, nitrogen and phosphorus Of the mineralization is better than tillage non-tillage.