| Variations of Microbial Communities and the Contents and Isotopic Compositions of Total Organic Carbon and Total Nitrogen in Soil Samples during Their Preservation |
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| 作者姓名： | TAO Qianye LI Yumei WANG Guo’an QIAO Yuhui LIU Tung-Sheng |
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| 作者单位： | College of Earth Science, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;College of Earth Science, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;College of Resource and Environmental Sciences, China Agricultural University, Beijing 100094, China;College of Resource and Environmental Sciences, China Agricultural University, Beijing 100094, China;Institute of Geology and Geophysics, the Chinese Academy of Sciences, Beijing 100029, China |
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| 基金项目： | This research is financially supported by the National Natural Science Foundation of China (Grant no. 40772112 and 40302024) and the President Foundation of Graduate University of the Chinese Academy of Sciences. |
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| 摘 要： | Semi-sealed preservation of soil samples at different moisture of 4% and 23%, respectively, was simulated to observe the variations of soil microbial communities and determine the contents and isotopic compositions of the total organic carbon and total nitrogen on the 7th and 30th day, respectively. The results show that during preservation, the quantity of microbial communities tended to increase first and then decrease, with a wider variation range at higher moisture (23%). At the moisture content of 23%, the microbial communities became more active on the 7th day, but less after 30 days, and their activity was stable with little fluctuation at the moisture content of 4%. However, there were no significant changes in the contents and isotopic compositions of the total organic carbon and total nitrogen. During preservation, the responses of soil microbes to the environment are more sensitive to changes in the total nitrogen and organic carbon contents. It is thus suggested that the variations of microbial communities have not exerted remarkable impacts on the isotope compositions of the total nitrogen and total organic carbon.
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| 关 键 词： | BIOLOG carbon isotope nitrogen soil microbe |
Variations of Microbial Communities and the Contents and Isotopic Compositions of Total Organic Carbon and Total Nitrogen in Soil Samples during Their Preservation |
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| Authors: | Qianye TAO Yumei LI Guo'an WANG Yuhui QIAO Tung‐Sheng LIU |
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| Institution: | 1. College of Earth Science, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;2. College of Resource and Environmental Sciences, China Agricultural University, Beijing 100094, China;3. Institute of Geology and Geophysics, the Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | Semi‐sealed preservation of soil samples at different moisture of 4% and 23%, respectively, was simulated to observe the variations of soil microbial communities and determine the contents and isotopic compositions of the total organic carbon and total nitrogen on the 7th and 30th day, respectively. The results show that during preservation, the quantity of microbial communities tended to increase first and then decrease, with a wider variation range at higher moisture (23%). At the moisture content of 23%, the microbial communities became more active on the 7th day, but less after 30 days, and their activity was stable with little fluctuation at the moisture content of 4%. However, there were no significant changes in the contents and isotopic compositions of the total organic carbon and total nitrogen. During preservation, the responses of soil microbes to the environment are more sensitive to changes in the total nitrogen and organic carbon contents. It is thus suggested that the variations of microbial communities have not exerted remarkable impacts on the isotope compositions of the total nitrogen and total organic carbon. |
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| Keywords: | BIOLOG carbon isotope nitrogen soil microbe |
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