| Biology and Soil |
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| Response of the Quantity and Distribution of Microorganisms in the Rhizosphere of Tamarix ramosissima Seedlings to Soil Moisture |
| LU Dong-ying1,2, LI Wei-hong1, YANG Yu-hai1, ZHU Cheng-gang1,2, SU Rui1,2 |
1.Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China；
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The quantity of microorganism living in the rhizosphere of Tamarix ramosissima seedlings under different irrigation treatments (high, middle and low irrigation quota) were studied, and the relationship between the numbers of microorganism and soil factors was analyzed. Results reveal that the numbers of bacteria and actinomycetes increase first and then decrease with increase of irrigation quota, and the numbers of fungi increase continuously with increase of irrigation quota. There is no significant seasonal variation for numbers of fungi under high irrigation quota treatment, while there are significant seasonal variations for numbers of bacteria, actinomycetes and fungi all other irrigation quota treatments. In all irrigation treatments, significantly negative correlations are observed between microorganism quantity and total salt content, and significantly positive correlations between microorganism quantity and soil pH value, total P content. In the condition of low irrigation quota, very significantly positive correlations are observed between bacteria quantity and total P and available P, and significantly positive correlations are observed between bacteria quantity and organic matter and total N.
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Received: 03 September 2011
Published: 20 May 2012
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2012, Vol. 32 
