干旱区生态环境知识资源中心(Arid): 放牧对草原生态系统不同气候区碳库影响的Meta分析

Arid

	放牧对草原生态系统不同气候区碳库影响的Meta分析
其他题名	Meta-analysis of effects of grazing on carbon pools in grassland ecosystems in different climatic regions
	周贵尧; 吴沿友
来源期刊	草业学报
ISSN	1004-5759
出版年	2016
卷号	25 期号:10 页码:1-10
中文摘要	草原生态系统碳库变化对全球碳平衡有着重要作用。近年来,尽管在全球尺度上开展了大量关于放牧对草原生态系统碳循环影响的独立研究,但放牧活动对草原生态系统不同碳库影响的一般规律认识仍然存在广泛争议。本研究采用整合分析方法对全球105篇关于放牧干扰对草原生态系统碳循环影响的文献进行系统研究。结果表明,放牧活动显著减少了植物地上和地下以及相关碳库的大小,而对土壤呼吸通量有明显的促进作用;不同类型碳库在不同气候带上响应存在明显差别,放牧对半湿润/湿润区地下植物碳库和土壤碳库减少幅度分别为15.21%和15.35%,显著高于干旱/半干旱地区响应比;植物地上部分碳库与土壤碳库之间没有显著关系,而植物地下部分碳库与土壤碳库之间呈显著正相关;土壤碳库响应比与年平均降水量呈正相关关系,而与年平均温度呈显著负相关;植物地下碳库响应比与年平均降水量和年平均温度均呈现显著负相关关系;放牧活动不仅显著地减少了植物地上和地下以及相关碳库的大小,还改变了植物的碳库分配。
英文摘要	Changes in carbon stocks in grassland ecosystems are an important factor in the global carbon balance. Although many individual studies have been conducted around the world on the effects of grazing on carbon cycling,there is still some controversy regarding the general effects of livestock grazing on different carbon pools.In this study,105 individual studies on the effects of grazing on carbon cycling were subjected to a metaanalysis. Our results revealed several general trends,which can be summarized as follows.Grazing activities significantly decrease the size of above-belowground and related carbon pools,but increase soil respiration.The types of carbon pools vary significantly among climate types.Grazing activities decrease the size of plant belowground carbon pools and soil carbon pools in semi-humid/humid climate regions(by 15.21%and 15.35%,respectively), but have smaller effects on these carbon pools in arid/semi-arid climate regions.There is no significant relationship between plant aboveground carbon pools and soil carbon pools,but there is a significant positive correlation between plant belowground carbon pools and soil carbon pools.The response ratio of soil carbon pools is positively correlated with mean annual precipitation,and significantly negatively correlated with mean annual temperature.Both mean annual precipitation and mean annual temperature are significantly negatively correlated with the response of plant belowground carbon pools.Grazing activities not only significantly decrease the size of plant aboveground and belowground carbon pools,but also alter carbon distribution in the plant.
中文关键词	放牧活动 ; 草地生态系统 ; 地下碳循环 ; Meta分析
英文关键词	grazing activates grassland ecosystem belowground carbon pools Meta-analysis
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5834370
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234018
作者单位	周贵尧, 江苏大学, 现代农业装备与技术教育部重点实验室, 镇江, 江苏 212013, 中国.; 吴沿友, 江苏大学, 现代农业装备与技术教育部重点实验室;;环境地球化学国家重点实验室, 镇江, 江苏 212013, 中国.
推荐引用方式 GB/T 7714	周贵尧,吴沿友. 放牧对草原生态系统不同气候区碳库影响的Meta分析[J],2016,25(10):1-10.
APA	周贵尧,&吴沿友.(2016).放牧对草原生态系统不同气候区碳库影响的Meta分析.草业学报,25(10),1-10.
MLA	周贵尧,et al."放牧对草原生态系统不同气候区碳库影响的Meta分析".草业学报 25.10(2016):1-10.