| 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。 |
| 关键词: 土壤放线菌，放线菌资源，放线菌分类，西藏 |
| DOI： |
| 分类号:S154.383 |
| 基金项目: |
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| A Study on the Soil Actionmycetes in Tibet |
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| Abstract: |
| 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 didn't 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. |
| Key words: soil actinomycetes,actinomycetes resources,actinomycetes classification,Tibet |
