Effects of vegetation coverage and seasonal change on soil microbial biomass and community structure in the dry-hot valley region
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Soil microorganisms are sensitive indicator of soil health and quality. Understanding the effects of vegetation biomass and seasonal change on soil microorganisms is vital to evaluate the soil quality and implement vegetation restoration. This study analyzed the soil phospholipid fatty acids (PLFAs) in fresh and withered Kudzu (Pueraria montana var. lobata) vegetation conditions in different seasons. The results showed that vegetation biomass and seasonal change significantly affected microbial biomass and its community structure. Both fresh and withered Kudzu cover significantly increased soil microbial biomass, and the growth effect of microbes in the soil with fresh Kudzu cover was more obvious than that with withered Kudzu cover. Compared with the dry season, the rainy season significantly increased the microbial biomass and the B/F (the ratio of bacterial to fungal PLFAs) ratio but dramatically reduced the G+/G- (the ratio of gram-positive to gram-negative bacteria PLFAs). Kudzu cover and seasonal change had a significant effect on microbial structure in soil covered by higher vegetation biomass. Furthermore, soil temperature and moisture had different correlations with specific microbial biomass in the two seasons. Our findings highlight the effect of Kudzu vine cover on the soil microenvironment and soil microhabitat, enhancing the soil quality in the Dry-hot Valley of Jinsha River, Southwest China.
KeywordsPhospholipid fatty acid Vegetation Soil microbes Soil temperature Soil moisture Dry-hot valley
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This work was supported by the National Key Research and Development Program of China (2017YFC0505102), the National Basic Research Programme (973 Programme) of China (2015CB452704), the National Natural Science Foundation of China (No. 41571277) and the Key Programme of the “Western Light” Talents Cultivation programme of the Chinese Academy of Sciences (2014).
- Bi ML, Yu WT, Jiang ZS, et al. (2010) Study on the Effects of different Land use Patterns on Microbial Community Structure in Aquic Brown Soil by Utilizing PLFA Method. Scientia Agricultura Sinica 43(9): 1834–1842. (In Chinese) https://doi.org/10.3864/j.issn.0578-1752.2010.09.009 Google Scholar
- Brockett BFT, Prescott CE, Grayston SJ (2012) Soil moisture is the major factor influencing microbial community structure and enzyme activities across seven biogeoclimatic zones in western Canada. Soil Biology & Biochemistry 44(1): 9–20. https://doi.org/10.1016/j.soilbio.2011.09.003 CrossRefGoogle Scholar
- He R, Wang GB, Wang JS, et al. (2009) Seasonal variation and its main affecting factors of soil microbial biomass under different vegetations along an elevation gradient in Wuyi Mountains of China. Chinese Journal of Ecology 28(3): 394–399. (In Chinese)Google Scholar
- Li, SQ, Ren SJ, Li SX (2004) Seasonal change of soil microbial biomass and the relationship between soil microbial biomass and soil moisture and temperature. Plant Nutrition and Fertilizer Science 10(1): 18–23. (In Chinese)Google Scholar
- Shu WH, Jiang Q, Wang ZJ, et al. (2012) Research advances about the effects of vegetation recovery on soil microorganism. Journal of Agricultural Sciences. 33(1): 73–79. (In Chinese)Google Scholar
- Smith JL, Paul EA (1990) The significance of soil microbial biomass estimations. In Stotzky, G. and Bollag, J.M. (eds.) Soil Biochemistry. Vol. 6. Marcel Dekker, New York. pp. 357–396. (In Chinese)Google Scholar
- Xue J, Li P, Li ZB, et al. (2011) Soil microbial biomass and activity along an altitudinal gradient in dry-hot valley. China Environmental Science 31(11): 1888–1895. (In Chinese)Google Scholar
- Yang XT, Ning GH, Dong HY, et al. (2006) Soil microbial characters under different vegetation communities in Taihang Mounatin Area. Chinese Journal of applied Ecology 17(9): 1761–1764. (In Chinese)Google Scholar
- Zogg G, Zak D, Ringelberg D, et al. (1997) Compositional and functional shifts in microbial communities due to soil warming. Soil Science Society of America Journal 61(2): 475–481. https://doi.org/10.2136/sssaj1997.03615995006100020015x CrossRefGoogle Scholar