干旱区生态环境知识资源中心(Arid): 不同载畜率和模拟降水对短花针茅荒漠草原生态系统碳交换的影响

Arid

	不同载畜率和模拟降水对短花针茅荒漠草原生态系统碳交换的影响
其他题名	Effects of different stockingrates and simulated precipitation on ecosystem carbon exchange in Stipa breviflora desert steppe
	宋晓辉; 王悦骅; 王占文; 闫宝龙; 韩国栋; 王忠武
来源期刊	草原与草坪
ISSN	1009-5500
出版年	2019
卷号	39 期号:6 页码:89-93
中文摘要	为探究不同载畜率和降水对荒漠草原生态系统碳交换产生的影响,采用Li-6400便携式光合仪和密闭式箱法于2016年生长季测定净生态系统碳交换,生态系统呼吸和总生态系统生产力。结果表明:在不同载畜率和降水的处理下,净生态系统碳交换都呈现碳吸收状态;在重度放牧情况下,增水100%处理下的总生态系统生产力显著高出减水50%、自然降水和增水50%处理(P<0.05);在自然降水和增水50%处理下,净生态系统碳交换,生态系统呼吸通量和总生态系统生产力在不放牧和重度放牧之间存在显著差异(P<0.05)。试验证明,载畜率的增加显著降低了生态系统碳交换,模拟降水初期对生态系统碳交换变化不明显。
英文摘要	In order to study the effects of different stocking rates and precipitation on ecosystem carbon exchange in desert steppe,the net ecosystem carbon exchange,ecosystem respiration and gross ecosystem productivity were measured in the growing season of 2016 by using the portable optical LI-6400 and the method of static chamber.The results showed that:the net ecosystem carbon exchange showed carbon absorption status under the treatment of different stocking and precipitation;In heavy grazing treatment,the total ecosystem productivity under 100% water increase treatment was significantly higher than 50% water reduction,natural precipitation and 50% water increase(P<0.05);In the treatments of natural precipitation and 50% water increase,there was a significant difference in net ecosystem carbon exchange,ecosystem respiration,and total ecosystem productivity between no grazing and heavy grazing(P<0.05).Based on the results,it can be concluded that with the increase of stocking rate,the ecosystem carbon exchange was significantly reduced while the change in ecosystem carbon exchange during the initial stage of simulated precipitation was not obvious.
中文关键词	荒漠草原 ; 载畜率 ; 净生态系统碳交换 ; 生态系统呼吸通量 ; 总生态系统生产力
英文关键词	desert steppe stocking rate net ecosystem carbon exchange ecosystem respiration total ecosystem productivity
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6649257
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/2XILL650/316318
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 010010, 中国
推荐引用方式 GB/T 7714	宋晓辉,王悦骅,王占文,等. 不同载畜率和模拟降水对短花针茅荒漠草原生态系统碳交换的影响[J]. 内蒙古农业大学,2019,39(6):89-93.
APA	宋晓辉,王悦骅,王占文,闫宝龙,韩国栋,&王忠武.(2019).不同载畜率和模拟降水对短花针茅荒漠草原生态系统碳交换的影响.草原与草坪,39(6),89-93.
MLA	宋晓辉,et al."不同载畜率和模拟降水对短花针茅荒漠草原生态系统碳交换的影响".草原与草坪 39.6(2019):89-93.