干旱区生态环境知识资源中心(Arid): 高寒沙地人工植被恢复区地表沉积物粒度特征

Arid

	高寒沙地人工植被恢复区地表沉积物粒度特征
其他题名	Grain Size of Land Surface Deposits in a Vegetation Restoration Region of the Alpine Sandy Land in Qinghai,China
	田丽慧; 张登山; 彭继平; 吴汪洋; 张佩
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2015
卷号	35 期号:1 页码:32-39
中文摘要	共和盆地位于青藏高原东北部,是典型的高寒干旱、半干旱荒漠区。青海省治沙试验站经过近50年的发展,形成以封沙育草区、固沙造林区和农田林网区为一体的绿洲防护体系,成为中国高寒沙地土地沙漠化综合整治的典型示范。本文选择典型固沙植物柠条(Caragana korshinskii)和乌柳(Salix microstachya),针对不同治理年限的沙丘和丘间地,探讨治理50年后人工植被恢复区地表60cm深度土壤粒度的时空变化。结果表明:直播柠条能促进沙丘地表60cm土层沉积物的细化,尤以地表5cm更甚。土壤颗粒的变化与植被生长状况及物质来源有关。
英文摘要	The Gonghe Basin is a typical alpine arid and semi-arid sandy land,located in northeast of the Qinghai-Tibet Plateau,China.In 1958,the Sand-control Experimental Station of Qinghai Province was set up in Shazhuyu,one of the most serious desertification regions in the Gonghe Basin,to explore a suitable technology for cold sandy land restoration.After 50 years,Shazhuyu became a representative integrated renovation region for cold arid desertified land,forming a special oasis protection system,which is composed of areas of resorting vegetation by enclosure,stabilizing sand dunes by afforestation and protecting farmland by network of forest.We choose the typical sand-fixation plants Caragana korshinskii and Salix microstachyacontrolling in different years on sand dunes and lowlands to probe into the change of characteristics of land surface deposits from topsoil to the depth of 60 cm.Results show that the sediments in Shazhuyu are dominated by fine sand,consistent with other Chinese deserts’particles,while a clear difference made from sandy land in the Qinghai Lake Basin which was separated by the Qinghai South Mountain.Meanwhile, sediments in lowlands were phase alternating by aeolian sediments and river deposition.Even after decades of vegetation restoration on mobile dunes,soil mechanical composition was still dominated by sand,with clay and silt content increasing.It had a great effect on the top 5 cm soil texture when setting clay sand barrier. Following the years of governance,the role of water and chemical weathering happening,the clay gradually disappeared and the soil began to formation.Directly broadcasting C.korshinskii seed could promote refinement of sediments on surface 60 cm soil layer,especially,top of 5cm much finer.Meanwhile, the change of the soil particles related to vegetation growth and source of materials,particularly the distribution of vegetation.Because of the different initial states of existence in lowlands,the effect of Salix microstachyato grain size is difficult to describe.
中文关键词	沙珠玉 ; 地表沉积物 ; 粒度 ; 柠条(Caragana korshinskii) ; 乌柳(Salix microstachya)
英文关键词	Shazhuyu land surface deposits grain size Caragana korshinskii Salix microstachya
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:5337099
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233721
作者单位	北京师范大学, 环境演变与自然灾害教育部重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	田丽慧,张登山,彭继平,等. 高寒沙地人工植被恢复区地表沉积物粒度特征[J]. 北京师范大学,2015,35(1):32-39.
APA	田丽慧,张登山,彭继平,吴汪洋,&张佩.(2015).高寒沙地人工植被恢复区地表沉积物粒度特征.中国沙漠,35(1),32-39.
MLA	田丽慧,et al."高寒沙地人工植被恢复区地表沉积物粒度特征".中国沙漠 35.1(2015):32-39.