Study on the Particle Size Composition and Erodibility of Different Salinized Soils in Delingha City
WANG Qian-bing
LI Yue-mei
SONG Ming-dan
TALIN Ge-wa
WANG Hong-xia
LIU Cheng-qi
Abstract：In order to reveal the particle composition of different salinized soils and its relationship with soil erodibility K value in Delingha City of Qinghai Province,the EPIC model based on the mechanical composition and organic carbon volume content was used to estimate the soil erodibility K value,the soil particle size distribution,erodibility K value and their relationship of five kinds of salinized soils in this area were analyzed.The results showed that:on the whole,the soil particles in Delingha City were mainly composed of powder particle(55%-84%)and sand grain(15%-44%).With the increase of salinization degree,the soil texture gradually became finer.The K value of erodibility factor was ranged from 0.048 to 0.061,with an average value of 0.054.According to the classification standard of soil erodibility K value,the soil in the study area belonged to the soil with high erodibility(K＞0.048),and there was a high risk of erosion.By analyzing the correlation between the K value of soil surface erodibility and the composition of 8 soil particle sizes,it was found that the K value of erodibility factor was significantly positively correlated with clay particle and powder particle(P＜0.01).It showed that the salinization of surface soil in Delingha City was serious,and the increase of fine particles made the erodibility factor K value increase,and the soil was more susceptible to erosion.
Keywords：Saltification gradingSoil particle compositionSoil erodibilitySoil texture
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 35-41 )