干旱区生态环境知识资源中心(Arid): 科尔沁沙地结皮发育对土壤理化性质影响的研究

Arid

	科尔沁沙地结皮发育对土壤理化性质影响的研究
其他题名	Study on Crust Development and Its Influences on Soil Physicochemical Properties in Horqin Sand
	郭轶瑞; 赵哈林; 赵学勇; 左小安; 李玉强
ISSN	1009-2242
出版年	2007
卷号	21 期号:1 页码:135-139
中文摘要	通过野外取样和室内分析,初步研究了科尔沁沙地植被恢复过程中结皮的理化性质及其结皮发育对下层土壤特性的影响.结果表明,半流动、半固定和固定沙丘分别发育了物理、地衣及苔藓结皮,结皮的厚度、紧实度、水分、粘粉粒含量及各种全效、速效养分随沙漠化逆转趋势依次增加.同时,结皮的存在增加了其下层土壤的容重值,提高了颗粒组成中的极细砂和粘粉粒含量,富集了结皮下土壤的有机质、全N、全P、速效N、速效P等养分,随着结皮的发育,结皮对下层土壤的上述影响作用从半流动沙丘到半固定、固定沙地呈逐渐增长的趋势.沙漠化逆转过程中,结皮对土壤养分的富集在0～5 cm范围内,由表及里呈递减趋势.同一沙丘结皮下0～2.5 cm层土壤的容重、粘粉粒含量、养分含量均高于2.5～5 cm层及对照无结皮层相对应的值
英文摘要	Soil crust is a common and widespread phenomenon in desert areas all over the world thanks to its extraordinary ability to survive desiccation and extreme temperatures,high pH and salinity. Despite its unassuming appearance, biological soil crusts play a significant role in desert ecosystems,including involvement in the process of formation, stability and fertility of soil, preventing soil erosion by water or wind, increasing the possibility of vascular plant colonization,and being responsible for the stabilization of sand dunes. The present paper taking Horqin sand as the research region, by field sampling, the sand soil crust sample in different dune and plant community were collected,and its physical and chemical properties were analyzed, in which the mechanical composition, bulk density, soil nutrient elements, organic matter, pH, EC and CaCO_3 content of the crust and soil（0-2.5 cm and 2.5-5 cm under crust）were included. The result revealed that semi-mobile dune, semi-fix dune and fix dune were respectively developed soil crust, lichen crust and moss crust. The thickness, packing degree, water content, silt and clay content, total and available nutrients of crusts are gradually increasing along with the desertification reversion. Meanwhile, crust enhanced the bulk density, clay content, and accumulated nutrients of the soil under it, on an increase trend from semi-mobile dune to fix dune. The result also showed that the physical characters and organic matter, total N, total P and rapidly available nutrient in 0-2.5 cm soil layer under crust were higher than that of 2.5-5 cm soil layer and the contrast. At each location on dunes,the soil nutrients was mainly distributed in the surface 0-5 cm soil layer with crust cover, and the soil nutrients content gradually decreased from surface layer to the inner of dunes.
中文关键词	科尔沁沙地 ; 土壤结皮 ; 土壤理化性质
英文关键词	Horqin sand soil crust physical chemical properties
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:2809200
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/2XILL650/221446
作者单位	中国科学院寒区旱区环境与工程研究所奈曼沙漠化研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	郭轶瑞,赵哈林,赵学勇,等. 科尔沁沙地结皮发育对土壤理化性质影响的研究[J]. 中国科学院西北生态环境资源研究院,2007,21(1):135-139.
APA	郭轶瑞,赵哈林,赵学勇,左小安,&李玉强.(2007).科尔沁沙地结皮发育对土壤理化性质影响的研究.,21(1),135-139.
MLA	郭轶瑞,et al."科尔沁沙地结皮发育对土壤理化性质影响的研究".21.1(2007):135-139.