干旱区生态环境知识资源中心(Arid): 黑河中游荒漠绿洲人工梭梭土壤养分特征

Arid

	黑河中游荒漠绿洲人工梭梭土壤养分特征
其他题名	Soil nutrient characteristics of Haloxylon ammodendron plantation in a desert-oasis region in the middle reaches of Heihe River Basin
	孙特生 1; 李文彦 1; 刘继亮 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2017
卷号	31 期号:5 页码:179-185
中文摘要	人工梭梭是干旱区荒漠绿洲过渡带典型的防风固沙植被,其土壤养分水平影响着人工绿洲生态系统的稳定性和可持续性。以黑河中游荒漠绿洲不同林龄人工梭梭为研究对象,野外调查取样和室内测试分析结合,分析人工梭梭土壤养分特征。结果表明: 1)人工梭梭根部、冠幅边缘、株间空地之间土壤养分存在显著差异,总体表现为根部>冠幅边缘>株间空地,即人工梭梭土壤"肥岛"效应明显; 2)不同林龄人工梭梭之间土壤养分含量及其富集率存在显著差异,大致表现为30年梭梭>20年梭梭>10年梭梭>5年梭梭,且不同林龄人工梭梭土壤养分富集率与梭梭植株形态特征具有较显著相关性,即人工梭梭土壤"肥岛"效应与其生长发展间存在正反馈机制。因此,加强荒漠绿洲区人工梭梭的建植和管护,发挥其对土壤养分的改良作用,提高其对干旱区土地荒漠化防治的能力,是荒漠绿洲区生态屏障建设的一项长期任务。
英文摘要	There are many desert-oases in the northwest of China. Forestry engineering has been constructing extensively in desert-oasis region owing to the vulnerability of eco-environment,so it has the special significance for population distribution,economical and social development. Haloxylon ammodendron plantation is one of excellent trees owing to its drought-tolerance,salt-tolerance,the effect of windbreak and sand-fixation. Hence,soil nutrient level of Haloxylon ammodendron plantation will no doubt affect the stability and sustainability of artificial oasis ecosystem. In this study,Haloxylon ammodendron plantation with different ages in a desert-oasis region in the middle reaches of Heihe river basin were chosen to analyze their nutrient characteristics in soil. We also characterized the spatial difference of soil nutrient content using variance analysis,nutrient enrichment rate. We found that: (1) soil nutrient contents among rhizosphere,canopy brim and interspaces of Haloxylon ammodendron plantation showed a significant difference,which was specifically rhizosphere >canopy brim >interspaces,that was, soil fertile island effect of Haloxylon ammodendron plantation was obvious. (2) Soil nutrient contents and its enrichment rate among Haloxylon ammodendron plantation with different ages also showed a significant difference, which was 30-year-old Haloxylon ammodendron >20-year-old Haloxylon ammodendron >10-year-old Haloxylon ammodendron >5-year-old Haloxylon ammodendron. Furthermore,there was a significant correlation between soil nutrient enrichment rate of Haloxylon ammodendron plantation with different ages and plant morphology indexes. In other words,there is a positive feedback mechanism between soil fertile island effect of Haloxylon ammodendron plantation and its development. Therefore,strengthening of planting and protection of Haloxylon ammodendron plantation,playing their roles to improve soil nutrients,and increasing their ability to control land desertification would be a long-term task of ecological barrier construction in desert-oasis region.
中文关键词	" 肥岛" 效应 ; 土壤养分 ; 人工梭梭 ; 荒漠绿洲区
英文关键词	fertile island effect soil nutrient Haloxylon ammodendron plantation desert-oasis region
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:5960966
来源机构	中国科学院西北生态环境资源研究院 ; 西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236059
作者单位	1.西北师范大学社会发展与公共管理学院, 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	孙特生,李文彦,刘继亮. 黑河中游荒漠绿洲人工梭梭土壤养分特征[J]. 中国科学院西北生态环境资源研究院, 西北师范大学,2017,31(5):179-185.
APA	孙特生,李文彦,&刘继亮.(2017).黑河中游荒漠绿洲人工梭梭土壤养分特征.干旱区资源与环境,31(5),179-185.
MLA	孙特生,et al."黑河中游荒漠绿洲人工梭梭土壤养分特征".干旱区资源与环境 31.5(2017):179-185.