干旱区生态环境知识资源中心(Arid): 基于土壤粒度参数的荒漠草原地表粗粒化过程

Arid

	基于土壤粒度参数的荒漠草原地表粗粒化过程
其他题名	Soil Coarse Graining Process Based on Surface Grain Size Distribution in Xilamuren Desert Steppe
	蒙仲举 1; 王猛 2; 高永1 ; 毛振华 3; 汪季 1; 陈士超 1; 安正锋 4
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2017
卷号	24 期号:6 页码:22-28
中文摘要	草原退化特征已由植被变化为主演变为土壤退化的阶段,其植被覆盖变化可在一定程度上反映退化状况与过程,探明荒漠草原不同退化阶段(覆盖度)地表风蚀状况,对合理利用与保护草地资源意义重大。以希拉穆仁荒漠草原7个覆盖度(裸地,5%,20%,40%,60%,80%和100%)下的表层土壤为研究对象,利用激光衍射技术测量表层0 1cm土壤粒度组成,分析不同覆盖度下的平均粒径、标准偏差、偏度、峰态及分形维数等粒度参数变化情况及颗粒频率分布。结果表明:(1)土壤粒度组成均以沙粒和粉粒为主,黏粒含量较低;偏度可作为有效粒度参数指标。(2)随着盖度降低,平均粒径数值越大,分选性越好,频率曲线由近于对称正偏极负偏转变,峰态由尖锐变平缓,分形维数先增加后降低。(3)粒径分布基本呈双峰分布,盖度越小第二波峰滞后越明显,且分布均匀程度越低,易风蚀颗粒范围为144~869mum。
英文摘要	Grassland degradation characteristics have been transformed by changes in vegetation primarily for soil degradation stage,to a certain extent,its vegetation change can reflect the status and process of degradation. The wind erosion situation of different degradation stage in Xilamuren desert grassland was studied,which is of great significance for protecting and utilizing grassland resources in this area properly.In this research,the top soils(0-1cm)of 7 different types of vegetation coverage(0%,5%,20%,40%,60%,80%and 100%)were selected.In order to analyze the soil particle size characteristics in desert steppe,laser diffraction technique was used to identify the soil particle size distributions,and the particle size parameters such as the average particle size,standard deviation,skewness,kurtosis and fractal dimension were calculated. The results indicated that:(1)most topsoil particle sizes in desert steppe were mainly sand and silt,while the clay content was low;(2)With the decrease of the coverage,the average particle size became bigger,the sorting characteristics got better and the frequency curve changed by nearly symmetrical to positive skewness and partial negative skewness eventually,the kurtosis changed from the sharp to the flat,fractal dimension increased first and reduced later;(3)the particle size distribution was bimodal distribution,the smaller basic coverage was,the more obvious of the second wave lagged behind,and the lower level of uniform distribution was,the more coarse of particle size of the particles concentration was.
中文关键词	粒度参数 ; 土壤 ; 植被盖度 ; 荒漠草原
英文关键词	granularity parameter soil vegetation coverage 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:6179813
来源机构	西北农林科技大学 ; 内蒙古农业大学 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236716
作者单位	1.内蒙古农业大学沙漠治理学院, 中央与地方内蒙古共建风沙物理重点实验室, 呼和浩特, 内蒙古 010018, 中国; 2.北京林业大学林学院, 北京 100083, 中国; 3.鄂尔多斯市水土保持科学研究所, 鄂尔多斯, 内蒙古 017000, 中国; 4.西北农林科技大学,水土保持研究所, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	蒙仲举,王猛,高永,等. 基于土壤粒度参数的荒漠草原地表粗粒化过程[J]. 西北农林科技大学, 内蒙古农业大学, 北京林业大学,2017,24(6):22-28.
APA	蒙仲举.,王猛.,高永.,毛振华.,汪季.,...&安正锋.(2017).基于土壤粒度参数的荒漠草原地表粗粒化过程.水土保持研究,24(6),22-28.
MLA	蒙仲举,et al."基于土壤粒度参数的荒漠草原地表粗粒化过程".水土保持研究 24.6(2017):22-28.