间作不同农作物对刺梨园土壤微生物类群及酶活性的影响

Effects of Intercropping Different Crops on Soil Microbial Group and Enzyme Activities in Rose Roxburghii Orchard

为探究间作不同农作物对刺梨园土壤微生物类群和酶活性的影响,在贵州省黔南州龙里县谷脚镇刺梨种植基地设置刺梨/辣椒间作、刺梨/玉米间作和刺梨单作三个种植模式的试验区,取0~20 cm深度和20~40 cm深度的土样,分别测试其土壤微生物数量和酶活性,探明不同种植模式下土壤微生物(细菌、真菌、放线菌)数量和酶活性的变化。结果表明:间作对刺梨园土壤微生物数量和酶活性有促进的作用。间作模式下土壤微生物数量明显高于单作,综合比较发现:玉米//刺梨>辣椒//刺梨>刺梨单作;间作模式下土壤酶活性高于刺梨单作,其中:玉米//刺梨>辣椒//刺梨>刺梨。分析还表明:刺梨园土壤微生物数量和土壤酶活性之间呈正相关关系。

In order to explore the effects of intercropping different crops on soil microbial groups and enzyme activities in Rose roxburghit,a test area with three planting patterns:the thorn pear/pepper intercropping,thorn pear/maize intercropping and thorn pear monocropping in the thorn pear planting base in Gujiao Town,Longli County,Guizhou Province.soil samples with depths of 0~20 cm and depths of 20~40 cm were tested for soil microbial quantity and the changes of soil microbes(bacteria,fungi,actinomycetes)and enzyme activities under different planting patterns.The results showed that intercropping had a promoting effect on soil microbial quantity and enzyme activity in the thorn garden.The amount of soil microbes in the intercropping mode was significantly higher than that in the single crop.The comprehensive comparison showed that:corn-thorn pear>pepper-thorn pear>thorn pear single crop;soil enzyme activity in the intercropping mode was higher than that of thorn pear in the single crop,among which:corn-thorn pear>pepper-prickly pear>prickly pear single.The analysis also showed that there was a positive correlation between soil microbial quantity and soil enzyme activity in the garden.