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林业科学 ›› 2006, Vol. 42 ›› Issue (8): 139-143.doi: 10.11707/j.1001-7488.20060823

• 研究简报 • 上一篇    下一篇

2种野生岩生植物下土壤微生物生态分布研究

王慧芳1,2,3 罗承德1   

  1. 1.四川农业大学林学与园艺学院,雅安625014;2.中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室杨凌712100;3.中国科学院研究生院北京100101
  • 收稿日期:2004-10-29 修回日期:1900-01-01 出版日期:2006-08-25 发布日期:2006-08-25

Study on Ecological Distribution of Soil Microbes under Two Kinds of Petrophifle Plants

Wang Huifang1,2,3,Luo Chengde1   

  1. 1.College of Forestry and Horticulture, Sichuan Agricultural University Ya’an 625014; 2. State Key Laboratory of Soil Erosion and Dryland Farming of Loess Plateau Yangling 712100; 3. Graduate School of Chinese Academy of Sciences Beijing 100101
  • Received:2004-10-29 Revised:1900-01-01 Online:2006-08-25 Published:2006-08-25

关键词: 土壤微生物区系, 岩生植物, 优势菌属

Abstract:

Two kinds of petrophifle plants (Pogonatherum panideum and Erioophorum comosum) are broadly grown on the rock slope of roads in the southwest of China. The microfloras in the soil nearby the rhizosphere of two kinds of petrophifle plants were studied in different month in order to investigate the pattern of ecological distribution of soil microbes. The results of incubation by the dilution plate count showed the amount of soil microbes significantly varied with time. The amount of microbes in the soil under P. panideum got the peak in May, then decreased in September, November, July, March and January; and to E. comosum, the amount of soil microorganisms was greater in September than in other months and became less in November, May, March, January and July. Preliminary analysis showed there were the differences of soil microbial composition between two kinds of petrophifle plants; Bacteria was superiority in soil under P. panideum, while the average ratio of actinomyces was the greatest among the main soil microbial populations under E. comosum. Besides, 10 genera of heterotrophic bacteria, 13 genera of heterotrophic filamentous fungi and 2 genera of heterotrophic actinomyces were identified, P.asymmetrica, Trichoderma, Fusarium, Paecilomyces, Cladosporium, Griserubro-violaceus, Albosporus, Gloucus, Aureus, Cinereus, Grideofuseus, Bacillus and Pseudomonas were dominant in soils under two kinds of petrophifle plants, and it indicated the dominant genera of soil microbes were varied with season turning. When biochemical activities of soil microbes were detected, we found 42.7% of microbes excreted amylase and 53.4% of microbes could decompose cellulose.

Key words: soil microflora, petrophifle plants, dominant genera