基于最小数据集的砒砂岩区人工林地土壤质量评价指标体系构建  

Construction of Artificial Forest Soil Quality Evaluation Indices in the Feldspathic Sandstone Region Based on Minimum Data Set

作　　者：杨振奇 秦富仓 于晓杰 韩君 任小同 钱秋颖 YANG Zhen-qi;QIN Fu-cang;YU Xiao-jie;HAN Jun;REN Xiao-tong;QIAN Qiu-ying(College of Desert Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Institute of Water Science,Hohhot 010020,China;Daxinganling Key State Forestry Administration,Yakeshi 022150,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,内蒙古呼和浩特010018 [2]内蒙古自治区水利科学研究院,内蒙古呼和浩特010020 [3]内蒙古大兴安岭重点国有林管理局,内蒙古牙克石055150

出　　处：《土壤通报》2019年第5期1072-1078,共7页Chinese Journal of Soil Science

基　　金：内蒙古水利厅项目（NSK-2016S17）;2018内蒙古科技计划项目（201802106）;国家自然科学基金青年基金项目（41807079）

摘　　要：砒砂岩区是黄土高原区水土流失最为严重的地区之一,提升土壤质量是砒砂岩区生态修复工作的关键内容。研究砒砂岩区人工林地土壤质量指标的筛选及评价体系的构建,对于科学指导植被建设,减轻入黄泥沙有重要意义。本文针对砒砂岩4种典型人工林地土壤,运用敏感性分析、最小数据集法和主成分分析法,对人工林的土壤养分、质地、孔隙、酸碱度4类17项土壤属性指标进行了筛选。结果表明,砒砂岩区人工林土层厚度、速效磷、土壤粉粒、含水率、毛管孔隙度、全磷含量、有机质、碱解氮属中度敏感指标,土壤总孔隙度、全氮、速效钾、电导率、全钾含量属低度敏感指标,土壤砂粒、容重、pH属不敏感指标;砒砂岩区人工林地土壤质量的评价指标为毛管孔隙度、土层厚度、粉粒含量、有机质含量、全氮含量、电导率、含水率和速效磷含量8个指标;砒砂岩区人工林地土壤质量评价结果显示,沙棘林相比其他林地其土壤质量良好,油松林土壤质量最差。The feldspathic sandstone regions face the most severe soil erosion problems in the Loose Plateau.Improving soil quality is the key of ecological remediation in the feldspathic sandstone regions. The construction of soil quality index evaluation system is greatly significant for guiding vegetation construction and reducing coarse sand into the Yellow River. About 17 soil attribute indices of soil nutrient, texture, pore and pH were selected with the methods of sensitivity analysis, main component analysis and discriminant analysis in the artificial forests of feldspathic sandstone regions. The results showed that soil layer thickness, capillary porosity, the contents of available phosphorus(P), soil silt, total P, organic matter and alkali-hydrolyzed nitrogen(N), and soil water content were moderately sensitive indicators. Soil total porosity, electrical conductivity, and the contents of total N, available potassium(K) and total K were moderately sensitive indicators. Soil sand content, bulk density and pH were lowly sensitive indicators.Eight indicators including soil conductivity, silt content, soil thickness, total N, soil moisture content, capillary porosity,organic matter, and available P were identified as the assessment indicators of soil quality in the artificial forests of feldspathic sandstone regions. The assessment results indicated that the soil quality in Hippophae rhamnoides is good and that in Pinus tabulaeformis is relatively poor.

关 键 词：砒砂岩区 人工林地 土壤质量 评价指标 最小数据集 

分 类 号：S158.3[农业科学—土壤学]