新疆连作棉田土壤微生物数量动态变化  

Study on the Population Structure of Microorganisms and Their Dynamics in the Continuous Cropping Cotton Soil

作　　者：布合力其汗.白克力 王兰[3] 张利莉[1,2] 

机构地区：[1]塔里木大学生命科学学院,新疆阿拉尔843300 [2]塔里木盆地生物资源保护利用兵团重点实验室,新疆阿拉尔843300 [3]塔里木大学植物科学学院,新疆阿拉尔843300

出　　处：《塔里木大学学报》2009年第4期1-4,共4页Journal of Tarim University

基　　金：国家"973"计划前期研究专题课题(2007CB116303)

摘　　要：以新疆连作陆地棉吐絮期土壤为对象,采用稀释平板法测定土壤微生物数量变化趋势。结果表明:棉田土壤中微生物种群以细菌为主,其次为放线菌,真菌数量最少。不同连作年限,细菌数量随着连作年限的增加而逐渐减少,但连作10年后增加;真菌和放线菌数量总体呈增加的趋势;棉花枯萎病和黄萎病病原菌数量总体也呈增加的趋势;相同连作年限,土壤微生物种群结构变化不大。Using continuously cotton - cropped soil as the test material, carrying out the dilution - plate method, the soil microorganisms were quantitated in this paper. The result indicated that bacteria accounts for the largest proportion in the cotton - cropped soil microorganisms, actinomyces the second and fungi the smallest proportion. In line with the time span of continuously cropping year, the amount of bacteria showed a trend of significant decrease whinlO years and a trend of increase in varying degrees with a time span of over 10 years ; the amount of fungi and actinomyces increased in varying degrees ; the amount of pathogenic bacteria fusarium and Vertieillium of cotton showed a trend of slight increase ; In line with the time span of the same cropping year, population structure of soil microorganism didnt vary conspicuously.

关 键 词：连作陆地棉 吐絮期 土壤微生物种群结构 

分 类 号：S154.3[农业科学—土壤学]