侵蚀沉积物基本性质的研究

 本文对英国中西部地区1985年至1986年间壤质砂土上冲刷下来的土壤沉积物基本性质进行了研究。结果表明,土壤沉积物中粘粒、粉粒、砂粒和大石砾含量分别是1.98%,13.07%,83.28%和1.67%(n=84),养分元素为Ca0.20%,Fe1.23%,K1.85%,Mg0.49%,Mn0.02%,P 0.06%,Cu<12.0mg·kg^-1,S43.0mg·kg^-1,有机质含量为1.65%pH值是514(H₂O)和5.01(0.01MCaCl₂),从1985年12月19日至1986年12月19日在十个径流小区所收集的侵蚀土壤沉积物来看,土壤的颗粒组成、有机质含量、pH值均随时间而变化,表现为沉积物中的细粒部分含量增加、有机质含量增加、pH值下降。研究结果还发现,坡度和沉积物颗粒组成之间、沉积物的有机质含量和颗粒组成之间有显着的相关性。

Studies on The Properties Of Eroded Sediment

The properties of Sediment eroded from the Loamy sand soils in West mid-lands,UK were studied.The results showed the contents of clay,silt,sand and coarse fraction of the sediment were 1.98%,13.07%, 83.28%and 1.67%(n=84)respectively.Nutrient contents were Ca 0.20%, Fe 1.23%,K1.85%,Mg 0.49%,Mn0.02%,P0.06%,Cu 12mg·kg^-1,S 43.0mg·kg^-1.Organic matter content was 1.59.PH Values were 5.14(H₂O)and 5.01(0.01M CaCl₂)From 19/12/1985 to 19/12/1986,Soil Particle size distribution,organic matter contents,pH Values of Sediments were changed:the fine fractions and organic matter content increased,PH values decreased.The relationships between organic matter content and particle size,slope angle and particle size were examined.