本文選題：土壤濺蝕　切入點：土壤理化性質(zhì)　出處：《水土保持研究》2017年03期 　論文類型：期刊論文

【摘要】：土壤濺蝕是土壤侵蝕的初始階段,是降雨雨滴直接打擊土壤表層引起的土壤顆粒分散和位移發(fā)生的過程。為研究土壤理化性質(zhì)與土壤濺蝕速率的相關(guān)性,研究通過人工模擬降雨濺蝕試驗測定土壤濺蝕速率,運用SPSS 20.0軟件,對土壤理化性質(zhì)與土壤濺蝕速率進行了Pearson相關(guān)系數(shù)分析。結(jié)果表明:土壤滲透性、分散率、團聚度和土壤粒級與土壤濺蝕速率相關(guān)性最大。土壤的滲透系數(shù)在整個降雨歷時階段對土壤的濺蝕速率一直呈現(xiàn)負影響。分散率在降雨歷時為15min時對土壤濺蝕速率呈顯著負影響。團聚度對土壤濺蝕速率的影響由T=15min時的顯著正相關(guān)變成T=20min時的極顯著正相關(guān)。土壤粒級和土壤濺蝕速率相關(guān)性很大,且關(guān)系較為復(fù)雜。相較于其他4種粒級中,粒級范圍在D0.002mm的土壤顆粒對土壤濺蝕速率影響最大,且在降雨歷時為15~20min時,對土壤濺蝕速率皆有顯著正相關(guān)性。另外,粒級范圍在0.2≤D2mm和0.02≤D0.2mm的土壤顆粒分別在T=15min和T=20min時對土壤濺蝕速率有顯著負相關(guān)性。土壤粒級對土壤濺蝕速率的相關(guān)性隨降雨歷時的變化可能與土壤結(jié)皮有關(guān)。
[Abstract]:Soil splash erosion is the initial stage of soil erosion. It is the process of soil particle dispersion and displacement caused by raindrops hitting the surface of soil directly. In order to study the correlation between soil physical and chemical properties and soil splash erosion rate. The soil splash rate was measured by artificial simulated rainfall splash test. The Pearson correlation coefficient between soil physical and chemical properties and soil splash rate was analyzed by using SPSS 20.0 software. The results showed that the soil permeability and dispersion were obtained. The correlation between soil splash erosion rate and aggregate degree and soil particle size was the greatest. The soil permeability coefficient had a negative effect on soil splash erosion rate in the whole rainfall duration stage, and the dispersion rate had a negative effect on soil splash erosion rate when the rainfall duration was 15 min. The effect of agglomeration on soil spatter rate was significantly negative. The significant positive correlation of soil spatter erosion rate increased from 15 min to 20 min, and there was a significant correlation between soil particle size and soil splash rate. Compared with the other four grain classes, soil particles of D 0.002 mm had the greatest effect on the soil splash erosion rate, and had a significant positive correlation with the soil splash erosion rate when the rainfall duration was 15 ~ 20 min. In addition, when the rainfall duration was 15 ~ 20 min, there was a significant positive correlation between the soil spatter erosion rate and the soil splash erosion rate. Soil particles with grain size of 0.2 鈮，

本文編號：1618224