秸秆还田对水田改旱田地块玉米产量及地下大型土壤动物群落的影响

Effect of straw returning to upland field alternated from paddy field on maize yields and large soil animal communities

分析了不同量秸秆还田对玉米产量及地下大型土壤动物群落的影响。结果表明,50%秸秆还田情况下玉米产量高于100%秸秆还田;正常施肥秸秆不还田时,玉米产量最低。正常施肥秸秆还田的土壤中土壤大型动物数量高于秸秆50%还田的土壤,地下大型土壤动物数量最少的是秸秆100%还田。在45个方样田块中共采集土壤动物472只,隶属26科;其中,地蜈蚣科、纽带科、蚁科为优势类群。秸秆还田对土壤动物的数量影响较大,但对土壤动物的类群数及土壤生物的多样性影响不大。

Effect of straw returning to upland field alternated from paddy field on maize yield and large soil animal communities were investigated. The results showed that the grain yield of maize on the field with 50% straw returned was significantly higher than those with 100% straw returned and no straw returned （P〈0.05） ,whereas that with 100% straw returned was slightly higher than without straw returned. For the quantity of soil animals,the number of large soil animals in plots with 50% straw returned combining with normal fertilizing is greater than the other cases. 472 soil animals were found in plots observed,which were belong to 26 families. Among these, Geophilidae, Hoplolaimdae and Formicidae were dominant families. In addition, no significant differences in community and biodiversity indexes among different treatments were found,indicationg that, although it was not significantly impacting on soil biodiversity, but the straw returning activity significantly influenced on the quantity of soil animals.