干旱区生态环境知识资源中心(Arid): Meta分析放牧对中国北方草地生态系统蒸散量的影响

Arid

	Meta分析放牧对中国北方草地生态系统蒸散量的影响
其他题名	Meta-analysis of the effect of grazing on grassland evapotranspiration in China
	许庆民; 王云英; 辛莹; 郭小伟; 杜岩功
来源期刊	草业科学
ISSN	1001-0629
出版年	2020
卷号	37 期号:10
中文摘要	草地是陆地生态系统的重要组分,放牧为草地最主要的利用方式之一,而蒸散是关系草地生态系统能量和水分平衡的核心环节。本研究采用Meta分析方法,通过对中国草地已开展的23个有关放牧对草地蒸散量影响的试验结果进行耦合分析。结果表明:放牧对中国草地生态系统蒸散量影响的平均效应值为-0.21 0.04,放牧极显著降低草地蒸散量(P < 0.001)。不同类型草地平均效应值降低幅度从大到小依次为草甸草原、温性草原、高寒草地、荒漠草地;除荒漠草地外,放牧显著降低其他3种草地蒸散量( P < 0.05)。不同放牧强度对平均效应值具有极显著影响(P < 0.000 1)。对草地蒸散量影响顺序从高到低依次为重度、轻度和中度放牧;中度放牧下草地蒸散量降低幅度最小,有利于减少土壤水分损失。土壤有机质和全氮对平均效应值具有显著影响(P < 0.05),分别可以解释50.48 %和23.14%的效应值变异。未来通过对退化草地的有效恢复及草地土壤有机质和全氮含量的提高,将会有效降低平均效应值,减少土壤水分蒸散损失,进而提高水分利用效率。
英文摘要	Grasslands are important components of terrestrial ecosystems, and grazing is a key way in which grasslands are utilized and managed. In this study, 23 experimental results of grasslands in China were analyzed using meta-analysis. These results showed that the average effect size of grazing on evapotranspiration of grassland ecosystems was approximately -0.21 0.04, and grazing activities significantly reduced the evapotranspiration of grasslands in China (P < 0.001). Furthermore, the order of decreasing average effect size of different grassland types was: meadow grassland, steppe, alpine grassland, and desert grassland. Except for desert grassland, grazing significantly reduced the evapotranspiration of the other grassland types. In addition, grazing intensity had a significant effect on the average effect size, and the order of influence on evapotranspiration was: heavy, light, then moderate. Thus, moderate grazing reduced evapotranspiration least, which was beneficial for the reduction of soil water loss. Both soil organic matter and total nitrogen had significant effects on the average effect value (P < 0.05), which could explain the effect value variation of 50.48% and 23.14%, respectively. In addition, future effective restoration of degraded grasslands and the improvement of soil organic matter and total nitrogen content will potentially reduce the average effect value of grazing on evapotranspiration, reduce the loss of soil water, and improve water use efficiency.
中文关键词	放牧强度 ; 草地蒸散量 ; Meta分析 ; 平均效应值
英文关键词	grazing intensity evapotranspiration meta-analysis effect size
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6851247
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353347
作者单位	许庆民, 青海省生态环境监测中心, 西宁, 青海 810007, 中国. 王云英, 中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国. 辛莹, 中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国. 郭小伟, 中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国. 杜岩功, 中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国.
推荐引用方式 GB/T 7714	许庆民,王云英,辛莹,等. Meta分析放牧对中国北方草地生态系统蒸散量的影响[J]. 中国科学院西北生态环境资源研究院,2020,37(10).
APA	许庆民,王云英,辛莹,郭小伟,&杜岩功.(2020).Meta分析放牧对中国北方草地生态系统蒸散量的影响.草业科学,37(10).
MLA	许庆民,et al."Meta分析放牧对中国北方草地生态系统蒸散量的影响".草业科学 37.10(2020).