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| Responses of Functional Diversity of Soil Microbial Communities to Nutrient Additions in Stipa Baicalensis Steppe in Inner Mongolia,China |
| Received:April 02, 2014 |
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| KeyWord:Stipa Baicalensis steppe;nutrient addition;soil microbial community;Biolog-Eco |
| Author Name | Affiliation | E-mail | | ZHAO Xiao-chen | Environmental Protection and Monitoring Institute, Ministry of Agriculture, Tianjing 300191, China
College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture, Tianjin 300191, China | | | LIU Hong-mei | Environmental Protection and Monitoring Institute, Ministry of Agriculture, Tianjing 300191, China
Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture, Tianjin 300191, China | | | HUANGPU Chao-he | Environmental Protection and Monitoring Institute, Ministry of Agriculture, Tianjing 300191, China
Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture, Tianjin 300191, China | | | WANG Hui | Environmental Protection and Monitoring Institute, Ministry of Agriculture, Tianjing 300191, China
Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture, Tianjin 300191, China | | | BAI Long | College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China | | | WANG Cai-ling | Hailaer Agricultural Technology Promotion Center, Hulunbeier 021000, China | | | YANG Dian-lin | Environmental Protection and Monitoring Institute, Ministry of Agriculture, Tianjing 300191, China
College of Horticulture, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture, Tianjin 300191, China | yangdianlin@caas.cn |
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| Abstract: |
| To reveal the influence of nutrient additions on functional diversity of soil microbial communities in grassland, Biolog-Eco technique was used to study the changes in microbial functional diversity in Stipa Baicalensis steppe under seven different N, P and K fertilizer treatments including single and combined additions of nutrient N, P, and K.The AWCD values of the soil microbial communities followed the order:NP>P>NPK>NK>N>CK>K>PK. The richness index of microbial communities in soil was significantly higher in NP, P, NPK, NK, and N treatments than in K and PK treatments. However, evenness index(E) and dominance index(D) of the soil microbial communities were not different among the seven treatments. Principal component analysis showed that microbial carbon utilization was similar in CK, K, PK and NK treatments, but different in NP, P and N, NPK treatments. These results implied that NP, P, NPK, and N can increase the metabolic activity of microorganism, the diversities and the carbon utilization ability of soil microbial community, which improves the soil microbial functional diversity. |
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