干旱区研究2017，Vol.34Issue(2)：293-299,7.DOI:10.13866/j.azr.2017.02.07
呼伦贝尔沙质草原风蚀坑表层土壤粒度特征
Grain Size Characteristics of Topsoil in Blowouts on Sandy Grasslands in Hulun Buir
摘要
Abstract
In this study,the grain size characteristics of topsoil in different forms of typical blowouts in Wangong Town of Chenbaerhu Banner in the central part of northern sand belt on sandy grasslands in Hulun Buir were analyzed based on the observation and measurement,and their affecting factors were studied.The results showed that the sand material in the blowouts was dominated by fine sand,then by moderate-sized sand,and the contents of very fine sand and silt were low.There was no extremely coarse sand in topsoil of blowouts apart from the places where the topsoil was not eroded by wind.The curves of soil grain size frequency were all in a negative deviation except the extremely negative deviation at the withering stage,and the kurtosis trend accorded with the sorting.Concentration degree of sand at different stages was in an order of the grassland without wind erosion ＜ decaying stage ＜ fixing stage ＜ patch stage ＜ active development stage ＜ activation stage,and the kurtoses were moderate according to the classification standard.The grain size composition of sediments was uniform in the study area,the granular distribution curves of sand on the surface of blowouts were basically similar,and the surface sand became coarser due to the intensification of wind erosion and the degeneration of vegetation.关键词
风蚀坑/土壤粒度/沙质草原/呼伦贝尔Key words
blowout/soil grain size/sandy grassland/Hulun Buir引用本文复制引用
张惜伟,汪季,高永,丁延龙,宝成..呼伦贝尔沙质草原风蚀坑表层土壤粒度特征[J].干旱区研究,2017,34(2):293-299,7.基金项目
内蒙古自治区自然科学基金(2014MS0404) （2014MS0404）
国家林业公益性行业项目(201304325) （201304325）
