花生与药材套种对土壤微生物区系的影响

通过茅苍术、京大戟、黄姜（盾叶薯蓣）、半夏和阔叶麦冬5种药用植物与花生套种的盆栽试验，测定了不同时期花生土壤中的细菌、放线菌、霉菌和酵母菌数量，探讨利用药用植物套种花生缓解花生连作障碍的可行性.结果表明：茅苍术组和京大戟组抑制土壤霉菌效果最好，在花生花针期分别比对照组减少了53.87%和29.59%；在花生收获后的土壤中霉菌数量增加，有利于物质循环和养分还田.茅苍术、京大戟和半夏组土壤中细菌数量增加. 在花生花针期，5种药用植物套作组土壤中酵母菌数量均高于对照.霉菌形态鉴定结果表明，在茅苍术、京大戟和黄姜套作组中均未检测出花生常见病原菌.药用植物和花生套种可以有效调节土壤微生物区系.

Effects of intercropping peanut with medicinal plants on soil microbial community

With pot experiment,this paper studied the quantitative variations of bacteria,actinomyces,mould and yeast in soils of peanut intercropped with medicinal plants,aimed to test if such an intercropping pattern could remove the obstacles of peanut's continuous cropping.The results showed that Atractylodes lancea and Euphorbia pekinensis had the strongest inhibitory effect on mould.Compared with CK(mono-cropping peanut),the CFU of mould in the treatments intercropped with A.lancea and E.pekinensis was decreased by 53.87% and 29.59%,respectively during flowering-pegging stage of peanut,but increased after harvesting,which was in favor of substance circulation and nutrient returning.The CFU of bacteria in treatments intercropped with A.lancea,E.pekinensis and Pinellia ternate was all increased,and that of yeast in all five intercropping treatments was increased during the flowering-pegging stage of peanut.No familiar pathogens were found in the treatments intercropped with A.lancea,E.pekinensis and Diosoren zingiberebsis.Peanut intercropped with medicinal plants could regulate soil microbial community effectively.