干旱区生态环境知识资源中心(Arid): 希拉穆仁荒漠草原风蚀地表颗粒粒度特征

Arid

	希拉穆仁荒漠草原风蚀地表颗粒粒度特征
其他题名	Particle Size Characteristics of Wind Erosion Surface Soil in the Desert Steppe
	丁延龙 1; 高永1 ; 蒙仲举 1; 娜仁格日勒 2; 黄昕 1; 孙晓瑞 1; 吴昊 1; 党晓宏 1; 王猛 1
来源期刊	土壤
ISSN	0253-9829
出版年	2016
卷号	48 期号:4 页码:803-812
中文摘要	以荒漠草原常见的耕作区、围封区、放牧区及旅游区4种土地利用类型表层土壤为研究对象,利用激光衍射技术分析了0 ~ 2 cm表层土壤粒度组成,计算并分析平均粒径、标准偏差、偏度、峰态及分形维数等粒度参数,探讨风蚀颗粒范围。结果表明:①希拉穆仁荒漠草原耕作区、围封区、放牧区及旅游区4种土地利用类型土壤粒度组成均表现为以砂粒和粉粒为主,黏粒含量较低,样地平均粒径数值依次变小,分选性逐渐变好,峰态平缓,分形维数数值逐渐减小,土壤颗粒组成依次粗化;偏度分别为负偏、近于对称、正偏和偏正偏,彼此差异明显,偏度可作为有效的粒度参数指标。②通过分析粒度分布频率曲线和土壤粒度累积频率间平均距离,显示研究区粒径为134 mum和454 mum附近颗粒为近自然状态下的易风蚀颗粒。各粒度参数及分维值均显示放牧和旅游加剧希拉穆仁草原表层土壤风蚀,土壤粒度分布范围变宽,整体向粗粒化方向发展。
英文摘要	The topsoil samples of 0 - 2 cm were collected from farming land, fenced grassland, grazing grassland and tourist area in Xilamuren desert steppe and used to investigate soil particle size characteristics. First,the soil particle size distributions were identified by laser diffraction technique. Second, the particle size parameters of average particle size, standard deviation, skewness, kurtosis, and fractal dimension were subsequently calculated. And then, the erosion particle range was discussed. The results indicated that: 1) the topsoil particles in desert steppe were mainly composed of sand and silt, while the clay content was extremely low. Soil particle size followed the order: farming land < fenced grassland < grazing grassland < tourist area. Soil particle size distributions were all in poor sorting. The kurtosis was medium, wide flat, wide flat and medium for farming land, fenced grassland, grazing grassland and tourist area, respectively. The fractal dimensions were 2.39, 2.26, 2.20 and 1.88 for these land using types. Correspondingly, the skewness of these land using types was negative, nearly symmetrical, positive skewness and partial positive, respectively. The skewness can be used as an effective particle size parameter. 2) Based on the analyses of frequency curves of soil particle size and the average distance, it was found that when soil particles were about 134 mum and 454 mum, which are the easiest to be erode by wind under near nature conditions. The particle size parameters and fractal dimension showed that the grazing and tourism accelerated wind erosion of topsoil in this region. Soil particle distribution was becoming wide, and soil coarse particles increased gradually.
中文关键词	粒度特征 ; 风蚀 ; 荒漠草原
英文关键词	Particle size characteristics Wind erosion Desert steppe
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:5793478
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235063
作者单位	1.内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国; 2.内蒙古自治区锡林郭勒盟镶黄旗国营苗圃, 锡林郭勒, 内蒙古 013250, 中国
推荐引用方式 GB/T 7714	丁延龙,高永,蒙仲举,等. 希拉穆仁荒漠草原风蚀地表颗粒粒度特征[J]. 内蒙古农业大学,2016,48(4):803-812.
APA	丁延龙.,高永.,蒙仲举.,娜仁格日勒.,黄昕.,...&王猛.(2016).希拉穆仁荒漠草原风蚀地表颗粒粒度特征.土壤,48(4),803-812.
MLA	丁延龙,et al."希拉穆仁荒漠草原风蚀地表颗粒粒度特征".土壤 48.4(2016):803-812.