基于最小数据集的砒砂岩区不同地形土壤质量评价  

Soil Quality Evaluation of Different Terrains in Feldspathic Sandstone Region Based on Minimum Data set

作　　者：包雪源 BAO Xueyuan(Inner Mongolia Autonomous Region Forestry and Grassland Work Station,Hohhot 010019,China)

机构地区：[1]内蒙古自治区林业和草原工作总站,内蒙古呼和浩特010019

出　　处：《内蒙古林业科技》2025年第1期7-14,21,共9页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古黄河流域多沙粗沙区林草植被恢复技术体系研究采购项目(ZB2023021185)。

摘　　要：探究砒砂岩区的土壤质量状况,对于改善该区生态环境、指导人工林培育及可持续发展具有重要意义。本研究以不同地形的土壤作为研究对象,测定了16项土壤理化性质指标,运用主成分分析法(Principal component analysis,PCA)构建了土壤质量评价的最小数据集(Minimum data set,MDS),通过线性函数法(SL)、非线性函数法(SNL)对全数据集(Total data set,TDS)进行指标归一化处理,分别进行全数据集和最小数据集的土壤质量指数(Soil quality index,SQI)计算,对不同地形的砒砂岩区土壤质量进行了评价。结果表明:(1)砒砂岩的土壤养分含量偏低,其平均水平仅仅达到5级(贫瘠)的水准;(2)砒砂岩区土壤质量评价的最小数据集由土壤厚度、全磷、粉粒、砂粒、含水率和碱解氮构成,可以解释全数据集72.586%的信息;(3)研究区土壤质量指数均值为0.373,处于中等偏低水平,其中阴坡>阳坡,平坡>缓坡>斜坡>陡坡。本研究为砒砂岩区土壤质量诊断及选择合理的管理措施提供理论依据。Exploring the soil quality status in the feldspathic sandstone region is of great significance for improving the ecological environment in this area and guiding the cultivation of plantation forests and sustainable development.In this study,the soils with different terrains were taken as the research objects,and 16 soil physical and chemical property indicators were determined.The Principal component analysis(PCA)was used to construct the Minimum data set(MDS)for soil quality evaluation.Through the linear function method(SL)and the non-linear function method(SNL),the index normalization processing of the Total data set(TDS)was carried out,and the Soil quality index(SQI)calculations of TDS and MDS were conducted separately to evaluate the soil quality in the feldspathic sandstone region with different terrains.The results showed that:(1)The soil nutrient content of feldspathic sandstone was relatively low,and its average level only reached the standard of grade 5(barren);(2)The MDS for soil quality evaluation in the feldspathic sandstone region was composed of soil thickness,total phosphorus,silt,sand grains,water content and alkali-hydrolyzable nitrogen,which could explain 72.586%of the information of TDS;(3)The average SQI value in the study area was 0.373,which was at a moderately low level,among which the shady slope>the sunny slope,and the flat slope>the gentle slope>the slope>the steep slope.This study provided a theoretical basis for diagnosing the soil quality in the feldspathic sandstone region and selecting reasonable management measures.

关 键 词：土壤质量 地形 最小数据集 砒砂岩区 

分 类 号：S151.9[农业科学—土壤学]