南充市区紫色土抗蚀性评价  

Evaluation of Erosion Resistance of Purple Soil in Nanchong Urban Area

作　　者：马文灿 龚林 文星跃 Ma Wencan;Gong Lin;Wen Xingyue(College of Environmental Science and Engineering,China West Normal University,Nanchong 637001,Sichuan,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637001

出　　处：《绿色科技》2024年第24期55-59,68,共6页Journal of Green Science and Technology

摘　　要：为综合评价南充市区不同土地利用类型下紫色土抗蚀性水平,探索土壤抗蚀性与土地利用类型的关系,本文针对研究区5种地类共25个土壤样品,分别计算每个样品的9个土壤抗蚀性评价指标,并通过主成分分析模型进行综合评价。主成分分析模型下5种地类抗蚀性评分比较为:撂荒地(96.01)>草地(94.48)>果园(92.07)>旱地(88.05)>林地(86.27),最优评价指标:粒径小于0.01 mm物理性黏粒含量、分形维数、团聚体平均重量直径、大于0.5 mm水稳性团聚体含量、大于0.25 mm水稳性团聚体含量,增加植被、减少人为扰动等有助于改善土壤结构,提升土壤抗蚀性。To comprehensively evaluate the erosion resistance of purple soil under different land use types in Nanchong urban area and explore the relationship between soil erosion resistance and land use types,this study analyzed 25 soil samples from five land use types in the study area.For each sample,nine soil erosion resistance indicators were calculated,and a comprehensive evaluation was conducted using a principal component analysis model.The erosion resistance scores for the five land use types were as follows:abandoned land(96.01)>grassland(94.48)>orchard(92.07)>dryland(88.05)>woodland(86.27).The optimal evaluation indicators were:<0.01 mm physical clay content,fractal dimension,mean weight diameter of soil aggregates,>0.5 mm water-stable aggregate content,and>0.25 mm water-stable aggregate content.Increasing vegetation cover and reducing human disturbance were found to help improve soil structures and enhance soil erosion resistance.

关 键 词：紫色土 抗蚀性 主成分分析 

分 类 号：S714.7[农业科学—林学]