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Acta Prataculturae Sinica ›› 2011, Vol. 20 ›› Issue (2): 31-38.

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The temporal and spatial distribution of soil microorganism physiological floras in alpine shrubs of the eastern Qilian mountains

WANG Guo-rong, CHEN Xiu-rong, ZHANG Jun-zhong, HAN Yu-zhu, HU Yi-gang, YANG Cheng-de, XU Chang-lin   

  1. College of Grassland Science,Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Ministry of Education, Sino-U.S. Centers for Grassland Ecosystem Sustainability, Lanzhou 730070, China
  • Received:2009-12-11 Online:2011-02-25 Published:2011-04-20

Abstract: The temporal and spatial distribution characteristics of soil microorganism physiological groups of three alpine shrubs(Rhododendron fruticosa, Salix cupularis, Dasiphoru fruticosa) were studied in 2005 and 2006. The results showed that: 1) The seasonal dynamics of soil microorganism functional groups differed; 2) At different soil depths, the numbers of soil microorganism functional groups in the top soil layer (0-10 cm) were higher than in the deeper layer (10-20 cm); 3) The quantity of soil microorganism functional groups was in the order, Nitrifiers>Denitrifying bacteri>Ammonifying bacteria>Aerobe Azotobacter>Anaerobic>Azotobacter>Bacillus>Aerobe cellulose decomposing microoganisms>Anaerobic decomposing microorganisms; 4) Total numbers of soil microorganism physiological groups differed in different shrubs. Numbers of groups in S. cupularis sites were larger than in the other two sites. Those in R. fruticosa sites were less than in the S. cupularis sites but more than in the D. fruticosa sites.

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