干旱区生态环境知识资源中心(Arid): 放牧与围封对沙漠化草地土壤轻组及全土碳氮储量的影响

Arid

	放牧与围封对沙漠化草地土壤轻组及全土碳氮储量的影响
其他题名	Light Fraction and Total Organic Carbon and Nitrogen Stores in Desertified Sandy Grassland Soil as Affected by Grazing and Livestock Exclusion
	陈银萍 1; 李玉强 2; 赵学勇2 ; 罗永清 1; 尚雯 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2010
卷号	24 期号:4 页码:182-186
中文摘要	测定分析了长期放牧与围封对科尔沁沙漠化草地土壤轻组及全土碳氮储量的影响.结果表明:(1)围封与长期放牧草地0-100 cm土壤轻组有机质占土壤质量的比例分别为0.148%和0.0.53%,围封比放牧增加181%;土壤轻组含量与全土有机碳和氮含量存在极为显著的线性正相关关系;(2)围封草地0-100 cm土壤轻组碳和氮储量分别为271.38,20.36 g/mz,比长期放牧分别增加130%和164%;围封草地全土碳和氮储量分别为 1155.86,125.99g/m~2.比长期放牧分别增加58%和24%;(3)轻组有机碳和氮占全土有机碳和氮储量的比例,围封分别为23.48%和16.16%,放牧分别为16.05%和7.59%;(4)围封恢复对轻组有机质的影响主要发生在表层土壤,围封0-10 cm层土壤轻组含量比长期放牧增加537%,10-20 cm层增加216%,但20 cm深度以下两个样地间无统计学上的显著差异
英文摘要	Light fraction and total organic carbon and nitrogen stores were measured in desertified sandy grassland soil as affected by continuous grazing and livestock exclusion for 13 years in Horqin sandy land. Results show that:(1)Light fraction organic matter in the top 100 cm of the soil is 181% higher in the exclosure than at the continuous grazing site, which accounts for 0.148%and 0.053% of soil mass in the exclosure and grazing site respectively. There is a strong positive relationship between light fraction organic matter and total soil organic carbon, and total nitrogen. (2)Soil light fraction organic carbon store is 271.38 g/m~2 in the exclosure and 130% higher than at the grazing site, whereas light fraction nitrogen store is 20.36 g/m~2 and 164% higher. Total soil organic carbon store is 1155.86 g/m2 in the exclosureand 58% higher than at the grazing site, whereas total soil nitrogen store is 125.99 g/m~2 and 24%higher.(3)Light fraction organic carbon and nitrogen account for 23.48% and 16.16% of total soil organic carbon and nitrogen stores in the exclosure respectively, whereas 16.05% and 7.59% in grazing site.(4)The effects of exclosure on light fraction matter mainly focus on surface soil. Light fraction organic matter in the top 0-10 cm of the soil increases by 537%, and 10-20 cm by 216% in the exclosure compared to the grazing site. However, there is no significant difference from 20 cm down t0 100 cm between two sites
中文关键词	沙漠化 ; 禁牧围封 ; 土壤轻组有机质 ; 碳氮储量 ; 科尔沁沙地
英文关键词	desertification livestock exclusion light fraction organic matter carbon and nitrogen stores Horqin sandy land
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:3980389
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/2XILL650/225658
作者单位	1.兰州交通大学环境与市政工程学院, 兰州, 甘肃 730070, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	陈银萍,李玉强,赵学勇,等. 放牧与围封对沙漠化草地土壤轻组及全土碳氮储量的影响[J]. 中国科学院西北生态环境资源研究院,2010,24(4):182-186.
APA	陈银萍,李玉强,赵学勇,罗永清,&尚雯.(2010).放牧与围封对沙漠化草地土壤轻组及全土碳氮储量的影响.水土保持学报,24(4),182-186.
MLA	陈银萍,et al."放牧与围封对沙漠化草地土壤轻组及全土碳氮储量的影响".水土保持学报 24.4(2010):182-186.