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Chinese Journal of Applied Ecology ›› 2022, Vol. 33 ›› Issue (11): 2943-2953.doi: 10.13287/j.1001-9332.202211.031

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Responses of soil microbial community structure to litter inputs.

ZHANG Ya-qi1,2,3, CHEN lin1,2,3, PANG Dan-bo1,2,3, HE Wen-qiang1,2,3, LI Xue-bin1,2*, WU Meng-yao4, CAO Meng-hao1,2,3   

  1. 1Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education, Ningxia University, Yinchuan 750021, China;
    2Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in North China, Ningxia University, Yinchuan 750021, China;
    3School of Ecology and Environment, Ningxia University, Yinchuan 750021, China;
    4School of Agriculture, Ningxia University, Yinchuan 750021, China
  • Received:2021-10-25 Revised:2022-06-16 Online:2022-11-15 Published:2023-05-15

Abstract: Litter decomposition is one of the most important ecosystem processes, which plays a critical role in regu-lating nutrient cycling and energy flow in terrestrial ecosystems. The influence of litter inputs on soil microbial community is helpful for understanding the relationship between soil microbial diversity and terrestrial ecosystem function. We conducted a meta-analysis to examine how litter inputs affect soil microbial activity (fungi, bacteria, actinomycetes) and microbial biomass carbon, nitrogen in China. The results showed that compared with non-litter input, soil microbial biomass carbon and nitrogen were significantly increased by 3.9% and 4.4% respectively after litter inputs. Soil fungal PLFA, bacterial PLFA, and total microbial PLFA were increased by 4.0%, 3.1% and 2.4%, respectively. The effects of litter inputs differed significantly with climatic region, annual precipitation, vege-tation type, and soil pH. Under different climate conditions, the responses of soil microbe showed the trend of subtropical monsoon climatic region > temperate monsoon climatic region > temperate continental climatic region, which increased first and then decreased with increasing annual precipitation. Under different vegetation types, the responses of soil microbes showed the trend of broad-leaved forest > grassland ≈ mixed forest > coniferous forest.

Key words: litter input, soil microorganism, meta-analysis, response, influencing factor