Effects of Biological Crusts Succession on Soil Microbial Communities in Alpine Steppe

doi:10.11733/j.issn.1007-0435.2019.04.006

Acta Agrestia Sinica ›› 2019, Vol. 27 ›› Issue (4): 832-840.DOI: 10.11733/j.issn.1007-0435.2019.04.006

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Effects of Biological Crusts Succession on Soil Microbial Communities in Alpine Steppe

QIN Fu-wen¹, KANG Bin-yue¹, JIANG Feng-yan¹, XU Heng-kang¹, ZHOU Hua-kun², WEI Xiao-ting¹, LIU Xiao-li¹, SHAO Xin-qing¹

1. Grassland Science Department, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
2. Northwest Institute of Plateau Biology, Chinese Academy of Science, Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Xining, Qinghai Province 810008, China

Received:2019-04-02 Revised:2019-07-01 Online:2019-08-15 Published:2019-09-26

生物结皮演替对高寒草原土壤微生物群落的影响

秦福雯¹, 康濒月¹, 姜风岩¹, 徐恒康¹, 周华坤², 位晓婷¹, 刘晓丽¹, 邵新庆¹

1. 中国农业大学动物科技学院, 北京 100193;
2. 中国科学院西北高原生物研究所, 青海省寒区恢复生态学重点实验室, 青海西宁 810008

通讯作者: 邵新庆
作者简介:秦福雯(1994-),男,安徽六安人,硕士研究生,研究方向为草地恢复生态学,E-mail:s20183040579@cau.edu.cn
基金资助:
国家重点研发计划（2016YFC0501902）；青海省创新平台建设专项（2017-ZJ-Y20）资助

Abstract

Abstract: Biological soil crusts (biological crusts) is an important surface covering in alpine steppe,which plays a role in regulating soil nutrient circulation and microbial community structure. In this study,the effects of the generation and development succession of biological crusts on the surface soil (0~10 cm) microbial community structure were analyzed using phospholipid fatty acid (PLFA). The results showed that there were a total of 22 PLFA species in all tested soils,which characterized 7 microbial groups,among which common bacteria and fungi were the dominant microorganisms. No significant correlation between microbial biomass and biological crusts production and succession (P>0.05). RDA analysis showed that soil factors were significantly correlated with microbial biomass (P<0.01),soil fungal biomass was positively correlated with total nitrogen content(P<0.05),and actinomycete biomass was positively correlated with total phosphorus content(P<0.05). It indicated that there was complex correlation between biological crusts,soil and microbial community in alpine steppe ecosystem.

Key words: Alpine steppe, Biological crusts, PLFA, Soil microorganism

摘要： 生物土壤结皮（生物结皮）是高寒草原重要的地表覆盖物，具有调控土壤养分循环和微生物群落结构的作用。本研究采用磷脂脂肪酸（Phospholipid fatty acid，PLFA）法分析典型高寒草原生物结皮的产生和发育演替对表层土壤（0~10 cm）微生物群落结构的影响。结果表明：在所有供试土壤样品中共有22种PLFA，可表征7种微生物类群，其中常见细菌和真菌是主导微生物。各类群微生物生物量与生物结皮的产生和演替不具有显著的相关性（P>0.05）。冗余（Redundancy analysis，RDA）分析结果显示土壤因子与微生物生物量极显著相关（P<0.01），土壤真菌生物量与全氮含量显著正相关（P<0.05），放线菌生物量与全磷含量显著正相关（P<0.05）。可见，在高寒草原生态系统中，生物结皮、土壤养分和微生物群落之间存在着较为复杂的相关性。

关键词: 高寒草原, 生物结皮, 磷脂脂肪酸, 土壤微生物

CLC Number:

S812

QIN Fu-wen, KANG Bin-yue, JIANG Feng-yan, XU Heng-kang, ZHOU Hua-kun, WEI Xiao-ting, LIU Xiao-li, SHAO Xin-qing. Effects of Biological Crusts Succession on Soil Microbial Communities in Alpine Steppe[J]. Acta Agrestia Sinica, 2019, 27(4): 832-840.

秦福雯, 康濒月, 姜风岩, 徐恒康, 周华坤, 位晓婷, 刘晓丽, 邵新庆. 生物结皮演替对高寒草原土壤微生物群落的影响[J]. 草地学报, 2019, 27(4): 832-840.

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Effects of Biological Crusts Succession on Soil Microbial Communities in Alpine Steppe

生物结皮演替对高寒草原土壤微生物群落的影响

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