干旱区生态环境知识资源中心(Arid): 科尔沁沙地沙丘恢复过程中典型灌丛下结皮发育特征及表层土壤特性

Arid

	科尔沁沙地沙丘恢复过程中典型灌丛下结皮发育特征及表层土壤特性
其他题名	Crust Development and Subsurface Soil Properties Under Dominant Shrubs in the Process of Dune Restoration,Horqin Sand Land
	郭轶瑞; 赵哈林; 左小安; 李玉霖; 黄迎新; 王少昆
ISSN	0250-3301
出版年	2008
卷号	29 期号:4 页码:1027-1034
中文摘要	通过野外取样和室内分析相结合,对科尔沁沙地不同沙丘典型灌丛下结皮发育及结皮下表层土壤特性进行了初步研究.结果表明,半流动沙丘的差巴嘎蒿、半固定沙丘的小叶锦鸡儿、固定沙丘的冷蒿以及固定沙丘丘底的小红柳灌丛下分别发育了物理结皮、藻、地衣及苔藓结皮,结皮的厚度、硬度、水分、＜0.05 mm粘粉粒含量、有机质、全N、全P、速效N和速效P等指标在沙丘生境中为半流动沙丘＜半固定沙丘＜固定沙丘＜固定沙丘丘底,在结皮类型中为物理结皮＜藻结皮＜地衣结皮＜苔藓结皮,各结皮间养分含量和粒径分布差异极显著(P＜0.01).结皮下层土壤的养分及细颗粒含量随结皮发育进展呈增长趋势.同一沙丘结皮下0～5 cm范围内土壤容重、粘粉粒、养分含量由表及里呈递减趋势,且均高于同层流动风沙土.在4种灌丛的7类结皮中,固定沙丘丘底的小红柳灌丛下发育的苔藓结皮及其表土的养分、细颗粒含量明显高于其它沙丘灌丛下的结皮.
英文摘要	Soil crust is a common and widespread phenomenon in desert areas all over the world due 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. This study taking Horqin Sand Land as research region, by field sampling, crust and topsoil （0-2.5 cm and 2.5-5 cm under crust） samples in different dune habitats and shrub communities were collected, and their physicochemical properties were analyzed, including particle size distribution, bulk density, total nutrients and available nutrients, pH, EC and CaCO3 content. The result revealed that Artemisia halodendron in semi-mobile dune, Caragana microphylla in semi-fix dune, Artemisia frigida in fix dune and Salix microstachya in interdunal lowland were respectively developed physical soil crust, algae crust, lichen crust and moss crust. Crust thickness, hardness, water content, fine fraction, total and available nutrients gradually increased by semi-mobile dune 〈 semi-fix dune 〈 fix dune 〈 interdunal lowland in terms of different dune habitats, and by physical soil crust 〈 algae crust 〈 lichen crust 〈 moss crust in terms of different crust types. There were significant differences among crust types on nutrient content and particle size distribution （p 〈 0.01）. Meanwhile, crust enhanced the 〈 0.05 mm content and nutrient content of topsoil, following an increasing trend from semi-mobile dune to interdunal lowland. As to each crust, the parameters of 0-2.5 cm subsurface soil layer were higher than that in 2.5-5 cm soil layer. The result also showed that the fine fraction and nutrient content of moss crust under Salix microstachya in interdunal lowland were higher than others, so did the 0-5 cm subsurface soil under it.
中文关键词	科尔沁沙地 ; 典型灌丛 ; 土壤结皮 ; 表层土壤特性
英文关键词	Horqin Sand Land dominant shrubs soil crust subsurface soil properties
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3242725
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/2XILL650/222523
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,左小安,等. 科尔沁沙地沙丘恢复过程中典型灌丛下结皮发育特征及表层土壤特性[J]. 中国科学院西北生态环境资源研究院,2008,29(4):1027-1034.
APA	郭轶瑞,赵哈林,左小安,李玉霖,黄迎新,&王少昆.(2008).科尔沁沙地沙丘恢复过程中典型灌丛下结皮发育特征及表层土壤特性.,29(4),1027-1034.
MLA	郭轶瑞,et al."科尔沁沙地沙丘恢复过程中典型灌丛下结皮发育特征及表层土壤特性".29.4(2008):1027-1034.