Dynamics of Soil Microorganism and Enzyme Activity in Typical Steppe of Restoration Succession Process

doi:10.11733/j.issn.1007-0435.2012.02.015

›› 2012, Vol. 20 ›› Issue (2): 292-297.DOI: 10.11733/j.issn.1007-0435.2012.02.015

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Dynamics of Soil Microorganism and Enzyme Activity in Typical Steppe of Restoration Succession Process

SHAN Gui-lian¹, CHEN Gong¹, NING Fa³, MA Yu-bao², CHU Xiao-hui¹

1. Pasture Science Department, Yunnan Agricultural University, Kunming, Yunnan Province 650201, China;
2. Grassland Research Institute of Chinese Academy of Agricultural Science, Hohhot, Inner Mongolia 010010, China;
3. Grassland Station, Bureau of Agriculture and Stockbreeding in Zhangbei County, Zhangjiakou, Hebei Province 076450, China

Received:2011-08-26 Revised:2011-12-20 Online:2012-04-15 Published:2012-07-05

典型草原恢复演替过程中土壤微生物及酶活性动态变化研究

单贵莲¹, 陈功¹, 宁发³, 马玉宝², 初晓辉¹

1. 云南农业大学草业科学系, 云南昆明 650201;
2. 中国农业科学院草原研究所, 内蒙古呼和浩特 010010;
3. 河北省张北县农牧局草原站, 河北张家口 076450

通讯作者: 初晓辉,E-mail:chuxiaohui@ynau.edu.cn
作者简介:单贵莲( 1982- ),女,博士,讲师, 主要研究方向为草地生态,E-mail: shanguilian8203@yahoo.com.cn
基金资助:
国家重点基础研究"973"项目"北方草地与农牧交错带生态系统适应性管理的科学基础"(2007CB106800)资助

Abstract

Abstract: Natural grasslands were enclosed during growing seasons for selected years as research objects. Dynamics of soil microorganisms and enzyme activities in typical steppe during restoration processes were studied for discussing correlations among soil microorganisms, enzyme activities, vegetation characteristics and soil nutrients. Results showed that the number of soil bacteria, actinomycetes and fungi increased, soil enzyme activity enhanced, and soil microbial biomass C, N increased significantly (P<0.05) in 0~30 cm soil layer after 7, 10, 13 and 20 years enclosure compared with continuous grazing and increased gradually with enclosure period increasing. The change of soil microorganism and enzyme activity in typical steppe during restoring processes was basically identical with the change of vegetation characteristics and soil nutrient which showed a positive correlation.

Key words: Enclosure period, Soil microbial quantity, Soil microbial biomass C, N, Soil enzyme activity

摘要： 选取不同围封年限的生长季围封恢复草地为研究对象,开展典型草原恢复演替过程中土壤微生物及酶活性动态变化的研究,探讨土壤微生物及酶活性与草地植被及土壤养分的相关性。结果表明:与自由放牧草地相比,围封7年、10年、13年和20年的草地,其土壤0~30 cm土层细菌、放线菌和真菌数量显著增加,土壤转化酶、脲酶、蛋白酶和过氧化氢酶活性增强,土壤微生物量碳、氮含量显著增加(P<0.05),且随围封年限的延长呈增加的变化趋势。典型草原恢复演替过程中土壤微生物及酶活性与草地植被及土壤养分呈基本一致的变化规律,三者成密切的正相关关系。

关键词: 围封年限, 土壤微生物数量, 土壤微生物量碳、氮, 土壤酶活性

CLC Number:

S812
S154

SHAN Gui-lian, CHEN Gong, NING Fa, MA Yu-bao, CHU Xiao-hui. Dynamics of Soil Microorganism and Enzyme Activity in Typical Steppe of Restoration Succession Process[J]. , 2012, 20(2): 292-297.

单贵莲, 陈功, 宁发, 马玉宝, 初晓辉. 典型草原恢复演替过程中土壤微生物及酶活性动态变化研究[J]. , 2012, 20(2): 292-297.

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Dynamics of Soil Microorganism and Enzyme Activity in Typical Steppe of Restoration Succession Process

典型草原恢复演替过程中土壤微生物及酶活性动态变化研究

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