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| The response of microbial biomass carbon and metabolic characteristics of albic soil to land use change |
| Received:November 14, 2017 |
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| KeyWord:land use type;albic soil;soil microorganism;microbial biomass carbon;metabolic characteristics;Biolog-Eco |
| Author Name | Affiliation | E-mail | | ZHU Ke | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
College of Agriculture and Environmental Resources, Tianjin Agriculture University, Tianjin 300384, China | | | WANG Rui | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
College of Agriculture and Environmental Resources, Tianjin Agriculture University, Tianjin 300384, China | | | LI Gang | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | ligang06@caas.cn | | XIU Wei-ming | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Jing | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
College of Agriculture and Environmental Resources, Tianjin Agriculture University, Tianjin 300384, China | | | LI Bing | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Li-li | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIU Hui-fen | College of Agriculture and Environmental Resources, Tianjin Agriculture University, Tianjin 300384, China | | | ZHAO Jian-ning | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | YANG Dian-lin | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | |
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| Abstract: |
| In this study, we investigated the changes in microbial biomass carbon and the metabolic characteristics of forests, arable land, and meadows in northeast China. Soil samples were analyzed using the method of chloroform fumigation combined with Biolog-Eco microplate method. The results showed that the changes in microbial biomass carbon and microbial quotient were significantly different among the three land use types, following the order of meadow > forest > arable land. Biolog-ECO microplate analysis indicated that the average well color development (AWCD) for meadow was the highest, followed by forest. The lowest AWCD occurred for arable land. The Shannon index, Simpson index, and McIntosh index results showed the same trends as the AWCD. The relative utilization ratio of soil microorganisms to six types of carbon sources for the different land use types showed higher values for carbohydrates, amino acids, and carboxylic acids, ranging 44.63%~53.61%, 21.09%~25.45%, and 8.31%~15.16%, respectively. The conversion of land use significantly changed the preference of soil microorganisms for carbon source utilization. Arable land had the highest relative utilization ratio of carbohydrates and amino acids, and forest had the highest relative utilization of polymers. Meadow had the highest relative utilization of carboxylic acids, phenolic acids, and amines. Principle component analysis showed that the metabolic characteristics of soil microorganisms varied among the different land use types. Arable land and forest had similar metabolic characteristics of the soil microbial community. Redundancy analysis indicated that soil pH, total nitrogen, organic matter, available phosphorus, and nitrate nitrogen were the key factors affecting the metabolic characteristics of the soil microbial community. This research shows that land utilization change altere the soil physical and chemical properties, resulting in changes in microbial biomass carbon, activities, and metabolic characteristics. |
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