[1]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].水土保持研究,2017,24(06):22-28.
　MENG Zhongju,WANG Meng,GAO Yong,et al.Soil Coarse Graining Process Based on Surface Grain Size Distribution in Xilamuren Desert Steppe[J].Research of Soil and Water Conservation,2017,24(06):22-28.
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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》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年06期 页码: 22-28 栏目: 出版日期: 2017-11-24
Title:
Soil Coarse Graining Process Based on Surface Grain Size Distribution in Xilamuren Desert Steppe
作者:
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
1. 内蒙古农业大学 沙漠治理学院, 中央与地方共建风沙物理重点实验室, 呼和浩特 010018;
2. 北京林业大学 林学院, 北京 100083;
3. 鄂尔多斯市水土保持科学研究所, 内蒙古 鄂尔多斯市 017000;
4. 西北农林科技大学, 水土保持研究所, 陕西 杨凌 712100
Author(s):
MENG Zhongju1, WANG Meng2, GAO Yong1, MAO Zhenhua3, WANG Ji1, CHEN Shichao1, AN Zhengfeng4
1. College of Desert Science and Engineer, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. College of Forestry, Beijing Forestry University, Beijing 100083, China;
3. Erdos City Water Science Institute, Erdos, Inner Mongolia 017000, China;
4. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China
关键词:
粒度参数; 土壤; 植被盖度; 荒漠草原
Keywords:
granularity parameter; soil; vegetation coverage; desert steppe
分类号:
S152.3
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0-1 cm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144~869 μm。
Abstract:
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 (0-1 cm) 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.

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备注/Memo

收稿日期:2016-11-01;改回日期:2016-12-11。
基金项目:内蒙古农业大学优秀青年基金（2014XYQ-8）；中科院西部之光“内蒙古中西部沙化草原地表粗粒化过程研究”
作者简介:蒙仲举(1980-),男,内蒙古自治区呼和浩特市人,副教授,硕士生导师,博士,主要从事水土保持与荒漠化防治研究。E-mail:mengzhongju@126.com
通讯作者:高永(1962-),男,内蒙古自治区包头市人,教授,博士生导师,主要从事水土保持与荒漠化防治研究。E-mail:13948815709@163.com

更新日期/Last Update: 1900-01-01