选择轮作木薯年限达3年的蕉园,采取木薯茎叶100%粉碎还田措施,测定蕉园土壤微生物数量、酶活性、理化性质、香蕉长势和枯萎病发病率等。结果表明,与对照(空白)比较,木薯茎叶还田可显著降低可培养真菌数量、枯萎病病原菌数量及总真菌数量,增加可培养放线菌数量、总细菌数量和碱解氮含量,B/F、A/F(可培养细菌数/真菌数、放线菌数/真菌数)均增大;土壤的脲酶和蔗糖酶活性显著提高,香蕉株高、茎粗、叶面积和SPAD值(叶绿素含量)均显著增大,香蕉枯萎病发病率降低至33.9%。说明木薯茎叶还田在一定程度上有助于土壤微生物种群改善,且有效促进香蕉生长、降低香蕉枯萎病发病率。 The banana plantation period of rotation of cassava for three years was selected. The measures of 100% crushing and returning of cassava stem and leaves were taken, and the quantity of soil microorganisms, enzyme activity, physicochemical properties, the growth of banana and the incidence of blight were determined. The results showed that compared with the control (blank), cassava stems and leaves could decrease the number of culturable fungi, the number of pathogenic fungi and total fungi, the number of culturable actinomycetes, total bacteria and nitrogen, B / F, A / F (culturable bacteria / fungi, actinomycetes / fungi) increased; soil urease and invertase activity increased significantly, plant height, stem diameter, leaf area and SPAD value Chlorophyll content) increased significantly, the incidence of banana wilt decreased to 33.9%. The results showed that returning the cassava stems and leaves to a certain extent helped to improve the population of soil microorganisms and effectively promoted the growth of banana and reduced the incidence of banana wilt.