干旱区生态环境知识资源中心(Arid): 三江源农牧交错区植被群落及土壤固碳持水能力对退耕还草措施的响应

Arid

	三江源农牧交错区植被群落及土壤固碳持水能力对退耕还草措施的响应
其他题名	Response of vegetation community structure,soil carbon sequestration,and water-holding capacity in returning farmland to grassland plots,in the agro-pastoral transitional zone in the Three Rivers Source Region
	李令 1; 贺慧丹 1; 未亚西 1; 杨永胜 2; 罗谨 1; 李红琴 2; 李英年 2; 周华坤 2
来源期刊	草业科学
ISSN	1001-0629
出版年	2017
卷号	34 期号:10 页码:1999-2008
中文摘要	为探讨三江源农牧交错区植被群落演替、土壤固碳及水源涵养能力对退耕还草措施的响应,以青海省过马营镇退耕还草封育示范区为研究区域,通过野外实地监测及室内试验相结合的方法,分析了油菜(Brassica campestris)地经退耕还草措施后,植被群落演替、土壤固碳及持水能力的变化状况。结果显示,1)退耕还草11年后,其植被群落盖度、平均高度、植物分层及地上生物量均达到原生植被水平;而Shannon-Wiener群落多样性指数和Pielou均匀度指数分别达到原生植被的80.9%和97.5%。2)退耕还草11年后,0-40cm土层的土壤容重降低5%,土壤饱和持水量、毛管持水量及田间持水量分别较原生植被样地增加了12.6、9.4和11.2mm。3)退耕还草11年后,0-20cm土层土壤有机碳密度和C/N显著高于原生植被样地31.85%和37.63%(P<0.05),土壤全氮密度与原生植被样地的无显著差异(P> 0.05)。综上所述,退耕还草措施有利于农牧交错区荒漠化草地生态环境的恢复,是遏制和改善三江源区草地荒漠化的有效措施之一。
英文摘要	The present study aimed to explore the response of vegetation community succession,soil carbon sequestration, and water conservation capacity in returning farmland to grassland plots in the agro-pastoral transitional zone in the source region of the Three Rivers.The study region was a returning farmland to grassland demonstration zone in Guomaying town,Qinghai province and the study analyzed the changes in plant community succession,soil carbon sequestration,and water-holding capacity by field monitoring and laboratory experiments. The results demonstrated that:1)After 11 years,total coverage,average height,number of layers of plants,and aboveground biomass in returning farmland to grassland plots all reached the same levels as the original vegetation,and the Shannon-Wiener diversity index and Pielou evenness index reached 80.9% and 97.5%,respectively,of the original vegetation.2)After 11 years,the soil bulk density of the 0-40cm layer of returning farmland to grassland plots decreased by 5%compared to the original vegetation plots,and the saturation moisture capacity,capillary moisture capacity,and field capacity of returning farmland to grassland plots were 12.6,9.4,and 11.2mm greater than that of the original vegetation plots,respectively.3)After 11 years in the returning farmland to grassland plots,the soil organic carbon density and C/N had significantly increased by 31.85%and 37.63%,respectively,compared to the original vegetation plots(P<0.05),and there was no significant difference between the soil total nitrogen density of the returning farmland to grassland plots and the original vegetation plots(P>0.05).The results indicate that the returning farmland to grassland plots have benefited from restoration of the ecological environment in desert pastures in the agro-pastoral transitional zone.This is an effective measure to contain and improve the desertification in the source region of the Three Rivers.
中文关键词	农牧交错带 ; 植被恢复 ; 群落结构 ; 持水特征 ; 水源涵养 ; 容重 ; 土壤有机质
英文关键词	Agro-pastoral Transitional Zone vegetation restoration structure of community water-holding capacity water conservation soil bulk density soil organic matter
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; PLANT SCIENCES
WOS研究方向	Agriculture ; Plant Sciences
CSCD记录号	CSCD:6105832
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/2XILL650/235684
作者单位	1.中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国; 2.中国科学院西北高原生物研究所, 中国科学院高原生物适应与进化重点实验室, 西宁, 青海 810001, 中国
推荐引用方式 GB/T 7714	李令,贺慧丹,未亚西,等. 三江源农牧交错区植被群落及土壤固碳持水能力对退耕还草措施的响应[J]. 中国科学院西北生态环境资源研究院,2017,34(10):1999-2008.
APA	李令.,贺慧丹.,未亚西.,杨永胜.,罗谨.,...&周华坤.(2017).三江源农牧交错区植被群落及土壤固碳持水能力对退耕还草措施的响应.草业科学,34(10),1999-2008.
MLA	李令,et al."三江源农牧交错区植被群落及土壤固碳持水能力对退耕还草措施的响应".草业科学 34.10(2017):1999-2008.