干旱区生态环境知识资源中心(Arid): 短期降雨改变对荒漠草原植物群落特征的影响

Arid

	短期降雨改变对荒漠草原植物群落特征的影响
其他题名	Effect of short-term rainfall change on plant community characteristics in desert steppe
	闫宝龙; 王占文; 王悦骅; 康静; 宋晓辉; 王忠武; 韩国栋
来源期刊	草业科学
ISSN	1001-0629
出版年	2018
卷号	35 期号:5 页码:1004-1012
中文摘要	为了研究长期放牧效应和短期降雨改变对草原生态系统植被特征的影响,以长期控制载畜率(禁牧、轻度放牧、中度放牧、重度放牧)试验为基础,分析模拟不同降雨梯度(减少环境降雨50%、环境降雨、增加环境降雨50%和100%)下植物群落个体数量特征、物种多样性以及地上生物量对水分变化的响应。结果表明:1)长期放牧和短期降雨改变均显著影响群落盖度(P<0.05),群落盖度随放牧强度的增加而减少,却随降雨的增加而增大;2)短期降雨改变对物种多样性影响显著(P<0.05),中度放牧后在增加环境降雨100%处理下,最多出现22种物种;3)长期放牧和短期降雨改变对地上生物量均有显著影响(P<0.05),禁牧样地在环境降雨处理下地上生物量最高,为408.3g·m~(-2),重度放牧样地在减少环境降雨50%处理下地上生物量最低,为118.2g·m~(-2)。
英文摘要	In order to study the effects of long-term grazing and short-term rainfall variations on vegetation characteristics of a grassland ecosystem,an experiment using different rainfall gradients(50%reduction,ambient, 50%increase,and 100%increase in environmental rainfall)was conducted on the site of a long-term manipulative stocking rate experiment(no grazing,light grazing,moderate grazing,and heavy grazing),and the response(in terms of individual quantities,species diversity and aboveground biomass of the plant community) to rainfall changes was analyzed.The results showed that:1)variations in long-term grazing and short-term rainfall had significant effects on community coverage(P<0.05)(community coverage decreased with increasing grazing intensities but increased with increasing rainfall);2)the rainfall variations had significant effects on species diversity(P<0.05)(there was an increase of 22species with 100%increase in environmental rainfall under moderate grazing conditions);3)the long-term grazing and short-term rainfall variations had significant effects on aboveground biomass(P<0.05)(The highest aboveground biomass was 408.3g·m~(-2) under ambent rainfall under no-grazing conditions,and the lowest aboveground biomass was 118.2g·m~(-2) with 50%reduction in environmental rainfall in heavy grazing conditions).
中文关键词	降雨 ; 放牧效应 ; 载畜率 ; 植被特征
英文关键词	rainfall grazing effects stocking rate vegetation characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6244663
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237321
作者单位	内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国
推荐引用方式 GB/T 7714	闫宝龙,王占文,王悦骅,等. 短期降雨改变对荒漠草原植物群落特征的影响[J]. 内蒙古农业大学,2018,35(5):1004-1012.
APA	闫宝龙.,王占文.,王悦骅.,康静.,宋晓辉.,...&韩国栋.(2018).短期降雨改变对荒漠草原植物群落特征的影响.草业科学,35(5),1004-1012.
MLA	闫宝龙,et al."短期降雨改变对荒漠草原植物群落特征的影响".草业科学 35.5(2018):1004-1012.