德令哈市不同盐渍化土壤粒度组成及可蚀性研究  

Study on the Particle Size Composition and Erodibility of Different Salinized Soils in Delingha City

作　　者：王乾冰 李月梅[1,2,3] 宋明丹[1,2,3] 塔林葛娃 王鸿霞 刘承琦 WANG Qian-bing;LI Yue-mei;SONG Ming-dan;TALIN Ge-wa;WANG Hong-xia;LIU Cheng-qi(Qinghai University,Xining,Qinghai 810016,China;Academy of Agriculture and Forestry Sciences,Qinghai University,Xining,Qinghai 810016,China;Xining Experimental Station for National Agricultural Environment,Xining,Qinghai 810016,China)

机构地区：[1]青海大学,青海西宁810016 [2]青海大学农林科学院,青海西宁810016 [3]国家农业环境西宁观测实验站,青海西宁810016

出　　处：《福建农业科技》2025年第2期35-41,共7页Fujian Agricultural Science and Technology

基　　金：青海省重大科技计划专项(2023-NK-A3);第二次青藏高原综合科学考察研究资助(2019QZKK0303)。

摘　　要：为揭示青海省德令哈市不同盐化程度土壤的颗粒组成及其与土壤可蚀性K值的关系,采用野外取样与室内粒度分析相结合的方法,利用基于机械组成和有机碳体积含量的EPIC模型估算土壤可蚀性K值,分析该区域5种盐化程度土壤的土壤颗粒粒径分布、可蚀性K值及其两者之间的关系。结果表明:从整体来看,德令哈市土壤颗粒组成主要以粉粒(55%~84%)和砂粒(15%~44%)为主,随着盐化程度的增加土壤质地逐渐变细;可蚀性因子K值为0.048~0.061,平均为0.054。按照土壤可蚀性K值分级标准,研究区土壤均属于高可蚀性(K>0.048)土壤,存在较高的侵蚀风险。通过分析土壤表层可蚀性K值与8个土壤粒径组成的相关性发现,可蚀性因子K值与黏粒、粉粒呈极显著正相关(P<0.01),说明德令哈市表层土壤盐渍化严重,细颗粒增多使得可蚀性因子K值升高,土壤更易受侵蚀。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.

关 键 词：盐化分级 土壤颗粒组成 土壤可蚀性 土壤质地 

分 类 号：S157.1[农业科学—土壤学]