Scientia Agricultura Sinica ›› 2011, Vol. 44 ›› Issue (18): 3759-3767.doi: 10.3864/j.issn.0578-1752.2011.18.007

• SOIL & FERTILIZER·WATER-SAVING IRRIGATION·AGROECOLOGY & ENVIRONMENT • Previous Articles     Next Articles

Research on Soil Microbial Ecology Under Different Soil Organic Matter Levels in Farmland

JIAO  Xiao-Guang, GAO  Chong-Sheng, SUI  Yue-Yu, ZHANG  Xing-Yi, DING  Guang-Wei   

  1. 1. 黑龙江大学农业资源与环境学院
    2. 中国科学院东北地理与农业生态研究所
    3. 美国北方州立大学化学系
  • Received:2011-04-12 Revised:2011-06-13 Online:2011-09-15 Published:2011-06-27
  • Contact: Chong-Sheng GAO E-mail:csgao@neigaehrb.ac.cn

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Abstract: 【Objective】 Soil microbe play an important role in the whole terrestrial ecosystem. Soil microbial properties are important bio-indicators of soil health. Therefore, soil microbial properties were studied under different soil organic matter levels in order to provide a theoretical basis for maintaining or improving soil ecological functions in Chinese mollisols farmland. 【Method】The soils with different soil organic matters (SOM) contents were removed from Bei’an, Nenjiang and Hailun in Heilongjiang province, Dehui and Lishu in Jilin province to Hailun agroecology experimental station in Heilongjiang province, then soil microbial properties such as microbial biomass, activity,  functional diversity of microbial community were investigated for five soils with different SOM contents by using Biolog and other universal analysis in the fifth year after soil spatial removal in Hailun agroecology experimental station. 【Result】 The results showed that soil microbial biomass C, soil basic respiration, and the amount of soil bacteria and fungi were increased with SOM increasing. Soil microbial properties in Bei’an with the highest content of SOM reached significant differences with the other soils. The average well color development values (AWCD) also indicated that the metabolizing capacity of microbe population in Bei’an was higher than that in Lishu with the lowest content of SOM. It was different for the carbon source used by microbe population under different SOM levels. The sensitive microbe C sources were α-butanone acid, putrescine, D, and L-α-glycerol which effectively used by soil microbe population in Bei’an and Nenjiang with higher SOM content. The soil of Bei’an with the highest SOM content had the highest diversity indices (H), richness indices (S), and evenness indices (E) of microbe populations. 【Conclusion】 These results showed that different SOM contents of black soils affected the metabolic functions of microbial community under the same external environmental conditions in farmland.

Key words:

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