干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠西部梭梭大面积退化原因

Arid

	古尔班通古特沙漠西部梭梭大面积退化原因
其他题名	Cause of large-scale Haloxylon ammodendron degeneration in west Grurbantonggut Desert
	刘斌 1; 刘彤 1; 李磊 1; 赵新俊 2; 韩志全 2; 马大伟 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2010
卷号	29 期号:4 页码:637-642
中文摘要	通过对退化梭梭种群特征、土壤理化性质、地下水位等调查,分析了古尔班通古特沙漠西部梭梭退化的原因.结果表明:研究区多为极重度盐渍化土壤,梭梭林分稀疏,平均盖度为11.58%,幼苗更新极少,种群处于衰退状态;梭梭生活力(单株梭梭活枝与枯枝数量之比)与表层土壤(0～40 cm)、中层土壤(40～80 cm)电导率存在极显著负相关(r＝-0.79,P=0.0000;r=-0.32,P=0.009),与下层土壤(80～120 cm)含水量存在极显著正相关(r＝0.54,P=0.000);梭梭种群存活指数(样地活株与死株之比)及盖度均与地下水位埋深呈极显著负相关(r~2=0.40,P=0.007;r2=0.46,P=0.004).表明,地下水位降低、土壤水分匮缺以及土壤盐分含量过高是梭梭退化的主要因素.
英文摘要	Based on the investigation of the characteristics of degenerated Haloxylon ammodendron populations,soil physical and chemical properties,and groundwater level in west Gurbantonggut Desert,a cause analysis was made on the degeneration of H.ammodendron in the area.In the study area,most of the soils were heavily salinized,and the trees and seedlings were sparse,with an average coverage being only 11.58%.The age structure diagram indicated that the H.ammodendron populations were in declining.There was a significant negative correlation between the individual viability of H.ammodendron and the soil conductivity in 0-40 cm and 40-80 cm layers (r=-0.79,P=0.000;r=-0.32,P=0.009),and a significant positive correlation between the individual viability and the soil moisture content in 80-120 cm layer (r＝0.54,P=0.000).The survival index and coverage of the H.ammodendron populations were significantly correlated with groundwater level (r~2=0.40,P=0.007;r~2=0.46,P=0.004).It was concluded that the declining groundwater level,inadequate soil moisture,and high soil salt content were the main factors causing H.ammodendron degeneration.
中文关键词	梭梭 ; 生活力 ; 存活指数 ; 退化 ; 土壤理化性质
英文关键词	Haloxylon ammodendron viability survival index degeneration soil physical and chemical properties.
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3849600
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225556
作者单位	1.石河子大学,生命科学学院, 石河子, 新疆 832000, 中国; 2.石河子大学,师范学院, 石河子, 新疆 832000, 中国
推荐引用方式 GB/T 7714	刘斌,刘彤,李磊,等. 古尔班通古特沙漠西部梭梭大面积退化原因[J]. 石河子大学,2010,29(4):637-642.
APA	刘斌,刘彤,李磊,赵新俊,韩志全,&马大伟.(2010).古尔班通古特沙漠西部梭梭大面积退化原因.生态学杂志,29(4),637-642.
MLA	刘斌,et al."古尔班通古特沙漠西部梭梭大面积退化原因".生态学杂志 29.4(2010):637-642.