暗棕壤及白浆土林地土壤可蚀性因子的研究
Soil Erodibility Factors in Dark Brown Soil and White Soil of Forest Land
张琪 1王识然 1崔佳慧 2刘健 3金周慧子 4王宇1
作者信息
- 1. 吉林农业大学资源与环境学院,长春 130118
- 2. 吉林省土壤肥料总站,长春 130022
- 3. 长春合利水土保持科技有限公司,长春 130033
- 4. 龙井市水利局,龙井 133400
- 折叠
摘要
土壤可蚀性(K值)是水土流失监测的重要指标,林地的土壤环境,正在人为扰动下发生变化.结合土壤侵蚀模型估算土壤可蚀性因子,研究受人为扰动较大的暗棕壤及白浆土林地土壤可蚀性变化规律.经测定辉南县土壤暗棕壤和白浆土有机质平均值分别为7.953 6%,3.686 7%,采用美国制土壤质地分级系统,辉南县林下土壤主要是砂质黏壤土、砂质壤土和黏壤土.利用诺谟公式对辉南县林地土壤可蚀性因子进行估算,结果表明:2种土壤可蚀性因子暗棕壤＞白浆土.结合GIS手段确定退耕还林地块,退耕还林年限与土壤可蚀性因子K值做相关性分析,结果表明两者呈显著负相关,即退耕还林年限越大可蚀性因子K值越小,土壤抵抗侵蚀的能力越强.
Abstract
Soil erodibility(K value)is an important indicator of soil erosion monitoring.In this study,soil erodibility factor was estimated based on soil erosion model,and variation rules of soil erodibility of dark brown soil and white soil of forest land with significant human disturbance were studied.Laboratory measurements showed that the organic matter of dark brown soil and white soil in Huinan county was 7.953 6%and 3.686 7%,respectively.Judging by the American soil texture clas-sification system,underforest soil in Huinan county was mainly sandy clay loam,sandy loam and sand clay.Nomo formula was used to estimate erodibility factor of the soil in forest land of Huinan county.The results showed that K value of the two soils in Huinan county was dark brown soil＞white soil.Correlation GIS analysis between age of returning farmland to forest and soil erodibility factor K showed that there was a significantly negative correlation between the two,that is,the greater the age of returning farmland to forest,the smaller the K value of erodibility factor,and the stronger the ability of soil to resist erosion.
关键词
暗棕壤/白浆土/林地/可蚀性因子/退耕还林Key words
dark brown soil/white soil/forest land/erodibility factor/returning farmland to forest引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据