水土保持研究2017，Vol.24Issue(3)：53-58,6.
土壤理化性质与土壤溅蚀速率的相关性研究
Correlations Between Soil Physical-Chemical Proprieties and Soil Splash Erosion Rate
摘要
Abstract
Soil splash erosion is the beginning of soil erosion process,and results in soil particle dispersion and migration when the raindrop directly blows topsoil.To study the correlations between soil physical-chemical proprieties and soil splash erosion rate,we measured soil splash erosion rate based on artificial simulated rainfall splash erosion experiment,and used SPSS 20.0 software to analyze the Pearson correlation coefficient between the soil physical-chemical properties and soil splash erosion rates.The results show that soil permeability,dispersion rate,aggregation and soil particle have a great influence during the rainfall;soil permeability has negative effects on erosion rate in the whole duration of rainfall;the dispersion rate has a significant negative impact on the soil erosion rate when rainfall duration is 15 minitues;the correlation between aggregation and soil splash erosion rate changes from positive correlation when T=15 min to significantly positive correlation when T=20 min;soil particles are strongly correlated with soil splash erosion rate,and the relationship is more complex.Compared to the other four kinds of grain size,＜0.002 mm soil particle has the greatest impact on soil erosion rate,and has a significant positive effect during the latest two rainfall events.0.2≤D＜2 mm or 0.02≤D＜0.2 mm soil particle has a significant negative correlation on soil erosion rate when T=15 min and T=20 min,respectively.The correlation of soil erosion rate with soil particle sizes may be related to the soil crust.关键词
土壤溅蚀/土壤理化性质/渗透系数/团聚度/土壤颗粒组成Key words
soil splash erosion/soil physical-chemical proprieties/soil permeability/aggregation/soil particle分类
农业科技引用本文复制引用
孙贞婷,胡霞,李宗超,刘勇..土壤理化性质与土壤溅蚀速率的相关性研究[J].水土保持研究,2017,24(3):53-58,6.基金项目
国家自然科学基金“根系对灌丛化草地土壤大孔隙形成及水分运移的影响”(41471018) （41471018）
