干旱区生态环境知识资源中心(Arid): 不同放牧制度下短花针茅荒漠草原碳平衡研究

Arid

	不同放牧制度下短花针茅荒漠草原碳平衡研究
其他题名	Research on carbon balance of different grazing systems in Stipa breviflora desert steppe
	侯向阳; 徐海红
来源期刊	中国土壤与肥料
ISSN	1673-6257
出版年	2010
期号	6 页码:50-57
中文摘要	采用围栏封育,划区轮牧,禁牧休牧等措施进行退化草原修复和保护,是关系能否有效合理保护和利用草原,应对气候变化的一个重要命题.本研究以内蒙古短花针茅荒漠草原为对象,测定连续10年(1999~2009年)进行围栏禁牧,划区轮牧和自由放牧等不同放牧作用下的长久样区的草原碳输入,输出及平衡特征,旨在从碳平衡的角度为确定荒漠草原合理的放牧管理方式提供依据.采用野外调查法测定生物量季节动态,密闭气室法测定土壤呼吸动态.结果表明:(1)相较于自由放牧,划区轮牧能保持较高的凋落物量,家畜采食量以及地下生物量,在恢复地上植被方面无明显差别,禁牧保持较高的地上生物量,凋落物量及地下生物量;(2)土壤呼吸随着放牧的进行和季节水热条件的变化,呈现不同的变化趋势,自由放牧在干旱季节产生较小的土壤呼吸;(3)生长季内划区轮牧,自由放牧和围栏禁牧下的荒漠草原净生态系统生产力分别为413.78,401.45,416.80 g/(m2.a)C.短花针茅荒漠草原生态系统碳收支表现为碳汇,不同放牧制度对碳收支影响较小,相对而言,划区轮牧较自由放牧有微弱的碳积累优势
英文摘要	This is an important proposition that using fencing,rotational grazing,banning and delaying grazing and other measures restore and protect degraded grassland as well as cope with climate change.This study took Stipa breviflora desert steppe in Inner Mongolia as the research object,determinated carbon input,carbon output and carbon balance features in plots that affected by fencing,rotational grazing and continuous grazing effects for ten years(1999~2009).Using field investigation and enclosed chamber method(IRGA),dynamics of biomass and soil respiration rate was determined in Stipa breviflora desert steppe.The effects of grazing systems on carbon input,carbon output and carbon balance was studied in this paper.The results showed that:(1)Compared with continuous grazing,the litter fall,livestock feed intake and belowground biomass were increased by rotational grazing,while,community aboveground biomass was no significant difference between continuous grazing and rotational grazing.Litter fall,aboveground and belowground biomass were increased by non-grazing.(2)Compared with continuous grazing,rotational grazing and non-grazing increased the soil respiration rate in dry months.(3)Stipa breviflora desert steppe emerged to be carbon sinks under different grazing systems,and the net ecosystem production was respectively C 413.78 g/(m2·a),C 401.45 g/(m2·a),C 416.80 g/(m2·a).There was little difference between different grazing systems,and carbon sinks decreased in turn from non-grazing,rotational grazing to continuous grazing
中文关键词	荒漠草原 ; 放牧制度 ; 净初级生产力 ; 土壤呼吸 ; 碳平衡
英文关键词	desert steppe grazing systems NPP soil respiration carbon balance
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4087774
来源机构	中国农业科学院草原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226070
作者单位	中国农业科学院草原研究所, 农业部草地资源生态重点开放实验室, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	侯向阳,徐海红. 不同放牧制度下短花针茅荒漠草原碳平衡研究[J]. 中国农业科学院草原研究所,2010(6):50-57.
APA	侯向阳,&徐海红.(2010).不同放牧制度下短花针茅荒漠草原碳平衡研究.中国土壤与肥料(6),50-57.
MLA	侯向阳,et al."不同放牧制度下短花针茅荒漠草原碳平衡研究".中国土壤与肥料 .6(2010):50-57.