| 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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| 引用本文： | 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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| 作者姓名： | 秦福雯 康濒月 姜风岩 徐恒康 周华坤 位晓婷 刘晓丽 邵新庆 |
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| 作者单位： | 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 |
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| 基金项目： | 国家重点研发计划;青海省创新平台建设专项 |
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| 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。
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| 关 键 词： | 高寒草原 生物结皮 磷脂脂肪酸 土壤微生物 |
| 收稿时间： | 2019-04-02 |
Effects of Biological Crusts Succession on Soil Microbial Communities in Alpine Steppe |
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| 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. |
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| Authors: | QIN Fu-wen KANG Bin-yue JIANG Feng-yan XU Heng-kang ZHOU Hua-kun WEI Xiao-ting LIU Xiao-li SHAO Xin-qing |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Alpine steppe Biological crusts PLFA Soil microorganism |
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