西藏土壤放线性菌初步研究  

A Study on the Soil Actionmycetes in Tibet

作　　者：薛泉宏[1] 谭志远[1] 朱铭莪[1] 张晓琳[1] 

机构地区：[1]西北农业大学资源与环境科学系

出　　处：《西北农业大学学报》1999年第1期28-32,共5页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

摘　　要：采用常规方法研究了西藏８个主要土类１１个土样的土壤放线菌数量、主要属与类群、生理生化特性及拮抗特征。结果表明：①西藏不同土类及同一土类不同剖面表层土壤放线菌数量差异很大，随海拔升高，冻结期增长，土壤放线菌数量显著减少；②西藏土壤放线菌种类简单，供试菌株分为５属，链霉菌属占优势；③供试菌株大部分无明胶液化能力，约１／３无淀粉水解能力，淀粉水解能力较强者仅占１／３左右；④供试菌株约有１９％对革兰氏阳性菌有极强抗性，约９％对棉枯萎菌有较强抗性，仅有２％菌株对革兰氏阴性菌有抗性。The quantity,genus,physiological and biochemical characteristics and antibiotic property of actinomycetes in eight main soil types in Tibet were studied.The results indicated that:①The quantity of actinomycetes differed in different soil types and in different top horizon of the same soil type.The quantity of actinomycetes decreased with the increasing of elevation and frozen period.②The actinomycetes genus was simple.The strains tested were divided into five genus with streptomyces dominant.③The strains tested didnt liquefy gelatin.About one third of the strain didnt hydrolyze starch,and one third of the strain had strong starch hydrolysis.④19 percent of the strain tested had very strong antibiosis to gram positive bacteria,9 percent had strong antibiosis to cotton Fusarium wilt ( Fusarium vasinfectum Aek ),and only 2 percent had antibiosis to gram negatitive bacteria.

关 键 词：土壤放线菌 放线菌资源 放线菌分类 西藏 

分 类 号：S154.383[农业科学—土壤学]