不同秸秆覆盖耕作方式对稻—油轮作土壤理化性状的影响

Effect of Different Straw Covering Farming Patterns on Soil Physicochemical Properties under Rice-oilseed Rape Cropping System

通过成都平原定位试验,进行了稻—油轮作条件下2种不同秸秆覆盖耕作方式对土壤理化性状影响的研究。结果表明:秸秆覆盖耕作对土壤全量养分、速效养分以及有机质含量均有明显的提高作用,而且均以秸秆覆盖免耕效果最好;秸秆覆盖翻耕对土壤容重与土壤孔隙度的改善作用最为明显,而秸秆覆盖免耕效果较差。作物产量分析表明,稻—油轮作条件下覆盖处理对油菜的增产效果显著,尤以免耕覆盖处理产量最高;翻耕覆盖处理对水稻上却表现为的产量最高,而免耕覆盖处理的产量最低。研究表明,在稻—油轮作条件下,如何合理地采用秸秆覆盖翻耕或秸秆覆盖免耕,是今后值得继续研究的问题。

The location experiment in plain area of Chengdu was conducted to study the effect of two different straw covering farming patterns on soil physicochemical properties.The results showed that straw covering could obviously improve the congtent of the total nutrient,available nutrient and organic content,and straw covering with non-tillage had the best effects.Straw covering with tillage had obviously improving effects on soil bulk density and soil porosity,but straw covering with non-tillage had no.Under rice-rape rotation,straw covering had obvious effects on the yield of rape,especially in straw covering with non-tillage.Straw covering with tillage could significantly increase the rice yield.