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应用生态学报 ›› 2022, Vol. 33 ›› Issue (11): 2943-2953.doi: 10.13287/j.1001-9332.202211.031

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土壤微生物群落对枯落物输入的响应

张雅琪1,2,3, 陈林1,2,3, 庞丹波1,2,3, 何文强1,2,3, 李学斌1,2*, 吴梦瑶4, 曹萌豪1,2,3   

  1. 1宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021;
    2宁夏大学西北土地退化与生态恢复国家重点实验室培育基地, 银川 750021;
    3宁夏大学生态环境学院, 银川 750021;
    4宁夏大学农学院, 银川 750021
  • 收稿日期:2021-10-25 修回日期:2022-06-16 出版日期:2022-11-15 发布日期:2023-05-15
  • 通讯作者: *E-mail: lixuebin@ nux.edu.cn
  • 作者简介:张雅琪, 女, 1997年生, 硕士研究生。主要从事植物与微生物生态学研究。E-mail: 1194695029 @qq.com
  • 基金资助:
    国家自然科学基金项目(31960359)、宁夏重点研发计划项目(2021BEG02005)和第三批宁夏青年科技人才托举工程项目(TJGC2018068)

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

摘要: 枯落物分解在陆地生态系统物质循环能量流动中起着关键性作用,明确枯落物输入对土壤微生物群落的影响有助于理解土壤微生物生物多样性和陆地生态系统功能的相互关系。本文采用整合分析方法,以中国为研究区域,以不添加枯落物为对照组,探究土壤微生物(真菌、细菌、放线菌)及微生物生物量碳、生物量氮对枯落物输入的响应。结果表明:与不添加枯落物相比,添加枯落物后土壤微生物生物量碳、生物量氮分别显著增加3.9%和4.4%;土壤真菌PLFA、细菌PLFA及总微生物PLFA分别增加4.0%、3.1%和2.4%。枯落物输入对土壤微生物的影响受到气候条件、年降水量、植被类型及土壤酸碱度等因素的显著影响;不同气候类型下,土壤微生物对枯落物输入的响应呈现出亚热带季风气候区>温带季风气候区>温带大陆气候区的趋势,以及随着年降水量的增加呈现出先升高后降低的趋势;不同植被类型下,土壤微生物对枯落物输入的响应呈现出阔叶林>草地≈混交林>针叶林的趋势。

关键词: 枯落物输入, 土壤微生物, 整合分析, 响应, 影响因素

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