福建省长汀县崩岗不同植被盖度下土壤机械组成  

Soil Mechanical Composition under Different Vegetation Coverage in the Collapsing Areas of Changting County,Fujian Province

作　　者：谢炎敏 Xie Yanmin(Soil Conservation State of Changting County, Fujian Province ,36630)

机构地区：[1]福建省长汀县水土保持站,福建长汀366300

出　　处：《亚热带水土保持》2017年第4期18-22,共5页Subtropical Soil and Water Conservation

基　　金：国家科技支撑计划"南方红壤水土流失治理技术及示范"(2013BAC08B03)

摘　　要：崩岗作为南方红壤侵蚀区强度侵蚀的典型类型,是该区生态恢复和重建工作的一个难点。长汀水土流失区崩岗发育数量众多,本文选取长汀县濯田镇黄泥坑崩岗群内3条不同植被盖度(2%、20%和95%)的典型崩岗为研究对象,探讨不同植被盖度下崩岗土壤的质地特征,结果表明崩岗土壤机械组成以砂粒居多,粉粒与黏粒含量均较低,粗骨化现象明显;随着植被盖度的逐渐升高,崩岗土壤粉粒、黏粒含量呈增加趋势;沿集水坡面→崩壁→崩积体→沟道出口,崩岗土壤砂粒含量呈增加趋势。As the typical type of severe erosion in the red soil erosion areas of South China, the collapsing is the diffi- cult point in the ecological restoration and reconstruction in this area. There are many matured collapsing in the soil e- rosion areas of Changting County. It was selected three typical types of collapsing with different vegetation coverage （2%, 20% and 95% ）in the yellow mud collapsing groups, Zhuotian Township of Changting County for study the tex- tual characteristics of the collapsing soils with different vegetation coverage. The results show that, mechanical compo- sition of the collapsing soil mainly includes the sand, lower content of powder and clay with the obvious coarse ossification. Followed with the gradual increase of the vegetation coverage, the soil powder and clay increase in the collapsing soil. Along the water slope, collapse wall, collapse body and channel exit, the sand in the collapse soil appears the in- crease trend.

关 键 词：崩岗 不同植被盖度 土壤黏粒 长汀 

分 类 号：S152.3[农业科学—土壤学]