The carbon metabolism characteristics and diversity of soil microbial communities from pure or coniferous and broad-leaved mixed forests in the Maoer Mountain region

doi:10.3969/j.issn.1000-2006.2017.02.012

WU Di, ZHANG Mengmeng, ZHANG Yuying,LI Yang, ZHANG Yingxin, CHI Qi, PANG Haosheng, SUN Guangyu

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (02) : 81-89.

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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2017, Vol. 41 ›› Issue (02) : 81-89. DOI: 10.3969/j.issn.1000-2006.2017.02.012

The carbon metabolism characteristics and diversity of soil microbial communities from pure or coniferous and broad-leaved mixed forests in the Maoer Mountain region

WU Di, ZHANG Mengmeng, ZHANG Yuying,LI Yang, ZHANG Yingxin, CHI Qi, PANG Haosheng, SUN Guangyu^*

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【Objective】The characteristics of soil carbon metabolism of microbial communities were evaluated from pure and mixed forests(a pure stand of Picea koraiensis and one of Larix olgensis, mixed stands of P. koraiensis and Juglans mandshurica, P. koraiensis and Fraxinus mandshurica, L. olgensis and J. mandshurica, and L. olgensis and F. mandshurica)in the soil ecological system of the Maoer Mountain region. 【Method】By using Biolog^MT technology, this study compared the utilization of different carbon sources by rhizosphere microorganisms in pure and mixed plantations. 【Result】The average well color development(AWCD)of soil microorganisms in broad-leaved forests was higher than that of the coniferous forests, and the AWCD of soil microorganisms in mixed forests of J. mandshurica was higher than that of the coniferous and the broad-leaved mixed forests of F. mandshurica. The Shannon index of coniferous J. mandshurica mixed forests was significantly higher than that of the F. mandshurica mixed forests(P<0.05). The Simpson index trend was similar to that of the Shannon index. Carboxylic acids, amino acids and sugars were the three main carbon sources which led to the difference in soil microbial metabolism. After L. olgensis and P. koraiensis were mixed with F. mandshurica, their ability to utilize different carbon sources decreased; this also caused the AWCD decreasing. 【Conclusion】The mixed forests of J. mandshurica provided more favorable conditions to improve the carbon metabolism of soil microbial communities than mixed forests of F. mandshurica or coniferous forests.

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WU Di, ZHANG Mengmeng, ZHANG Yuying,LI Yang, ZHANG Yingxin, CHI Qi, PANG Haosheng, SUN Guangyu. The carbon metabolism characteristics and diversity of soil microbial communities from pure or coniferous and broad-leaved mixed forests in the Maoer Mountain region[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(02): 81-89 https://doi.org/10.3969/j.issn.1000-2006.2017.02.012

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