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Position: Home > Articles > Soil Quality Evaluation Along the Qinghai-Tibet Highway Based on the Minimum Data Set Research of Soil and Water Conservation 2022,29 (2) 125-131

基于最小数据集的青藏公路沿线土壤质量评价

作  者：
刘利昆;赵广举;穆兴民;高鹏;孙文义;韩剑桥
单  位：
西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所
关键词：
土壤质量;主成分分析;最小数据集;青藏高原
摘  要：
为明确青藏公路沿线土地土壤质量的基本特征,通过采集沿线3种不同土地利用类型(农地、草地和沙地)的土壤样品,采用主成分分析法(PCA,Principal Component Analysis)筛选最小数据集(MDS,Minimum Data Set)指标,并构建土壤质量指数(SQI,Soil Quality Index)定量评价其土壤质量。结果表明:(1)相较于农地和草地,沙地的土壤肥力较为贫瘠,其土壤有机质、全氮和有效磷的土壤肥力等级均为6级。9个土壤指标均为中低度敏感指标,沙地土壤黏粒和粉粒含量具有更强的空间分异性。(2)沿线土壤质量评价最小数据集由全钾、全磷、有机质、黏粒和粉粒组成,最小数据集能够较好地替代全数据集进行土壤质量评价(p<0.01)。(3)沿线农地的土壤质量指数SQI(0.535±0.043)高于草地SQI(0.499±0.044)和沙地SQI(0.449±0.066)。该研究发现沿线农地土壤质量为中等水平,沿线草地和沿线沙地土壤质量处于较低水平,土壤有机质是影响青藏公沿线土壤质量的主要因素。
译  名：
Soil Quality Evaluation Along the Qinghai-Tibet Highway Based on the Minimum Data Set
作  者：
LIU Likun;ZHAO Guangju;MU Xingmin;GAO Peng;SUN Wenyi;HAN Jianqiao;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University;Institute of Soil and Water Conservation, CAS & MWR;
关键词：
soil quality;;principal component analysis;;minimum data set;;Qinghai-Tibet Plateau
摘  要：
In order to clarify the characteristic of soil quality along the Qinghai-Tibet highway, field sampling was undertook to investigate soil quality variation between three different types of land use(farmland grassland, and sandy land) in this study. The principal component analysis method(PCA) was used to select the minimum data set indicators, and soil quality index was built to quantitatively evaluate soil quality. The results showed that:(1) compared with farmland and grassland, the soil fertility of sandy land was relatively poor, and the soil fertility grades of soil organic matter, total nitrogen and available phosphorus were all grade 6; the nine soil indicators in the study were all low-to-medium sensitive indicators, and clay and silt content of sandy land had stronger spatial differentiation;(2) the minimum data set for soil quality evaluation was consisted of total potassium, total phosphorus, organic matter, clay and silt content; the minimum data set could better replace the full data set for soil quality evaluation(p<0.01);(3) the soil quality index SQI(0.535±0.043) of the farmland was higher than the grassland SQI(0.499±0.044) and the sandy land SQI(0.449±0.066). This study found that the soil quality of farmland along the line was at a medium level, while the soil quality of grassland and sandy land was at a low level, and soil organic matter was the main factor affecting soil quality along the Qinghai-Tibet Highway.

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