| 毛乌素沙地不同林型下土壤肥力综合评价 |
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| 引用本文： | 林帅,闫伟,贾学文,闫海霞,刘泽昊,白淑兰.毛乌素沙地不同林型下土壤肥力综合评价[J].北方园艺,2019(15):91-98. |
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| 作者姓名： | 林帅 闫伟 贾学文 闫海霞 刘泽昊 白淑兰 |
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| 作者单位： | 内蒙古农业大学林学院,内蒙古呼和浩特,010019;鄂尔多斯市林业局天然林资源保护管理局,内蒙古鄂尔多斯,017010;呼和浩特市环境监测中心站,内蒙古呼和浩特,010030;鄂尔多斯市林业局市造林总场,内蒙古鄂尔多斯,017010 |
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| 基金项目： | 政府预算收支科目资助项目 |
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| 摘 要： | 土壤理化性质是评估林下土壤肥力重要指标;土壤肥力差异影响植被分布、演替轨迹等;探究土壤肥力质量,以期为鄂尔多斯地区毛乌素沙地人工造林树种选择、科学经营森林等提供参考。以鄂尔多斯地区毛乌素沙地杨柴(Hedysarum mongolicum)、藏锦鸡儿(Caragana tibetica)、沙地柏(Sabina vulgaris)、柠条锦鸡儿(Caragana korshinskii)、沙柳(Salix linearistipularis)5种典型林型下土壤为研究对象,选取土壤pH、有机质、全氮、全磷、全钾、铵态氮、速效磷、速效钾含量等指标作为评价土壤肥力因子,基于隶属度函数法对数据标准化,确定各项指标隶属度值,采用主成分分析法确定各指标权重,结合隶属度值及权重值,应用综合评价法对不同林型下土壤进行综合肥力评价,利用内梅罗指数法和综合评价法得出结论辅助验证。结果表明:1)研究区土壤pH变化范围为7.31~10.46,均值为8.35。2)7项因子对不同研究区综合土壤肥力贡献率依次为全钾(0.177)>速效磷(0.148)>铵态氮(0.138)>速效钾(0.134)>有机质(0.127)>全磷(0.099)>全氮(0.057)。3)不同林型下土壤应用综合评价法和内梅罗指数法确定土壤综合肥力质量变化趋势一致,依次为杨柴林>藏锦鸡儿林>沙地柏林>柠条锦鸡儿林>沙柳林。研究区土壤整体属于碱性土壤;土壤中全钾含量较高,对林地土壤肥力贡献率最高;土壤全氮、全磷含量较低,是林地土壤肥力主要限制因子;杨柴林林下土壤肥力较高,相较其它林分立地条件较好。
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| 关 键 词： | 毛乌素沙地 隶属度函数 主成分分析法 土壤肥力综合评价 内梅罗指数法 |
Comprehensive Evaluate of Soil Fertility of Different Forests in MU Us Sandy Land |
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| LIN Shuai,YAN Wei,JIA Xuewen,YAN Haixia,LIU Zehao,BAI Shulan.Comprehensive Evaluate of Soil Fertility of Different Forests in MU Us Sandy Land[J].Northern Horticulture,2019(15):91-98. |
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| Authors: | LIN Shuai YAN Wei JIA Xuewen YAN Haixia LIU Zehao BAI Shulan |
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| Institution: | (Forestry College, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019;Natural Forest Resources Protection Administration, Erdos City Forestry Bureau, Ordos, Inner Mongolia 017010;Huhhot Environmental Monitoring Center, Huhhot,Inner Mongolia 010030;City Afforestation Total Field,Erdos City Forestry Bureau, Ordos, Inner Mongolia 017010) |
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| Abstract: | Soil physical and chemical properties are important indicators for assessing soil fertility in forest;soil fertility differences affect vegetation distribution,succession trajectory,etc.To explore the quality of soil fertility in order to provide reference for the selection and scientific management of forest species in MU Us sandy land in Ordos region.Five kinds of forests,including Hedysarum mongolicum,Caragana tibetica,Sabina vulgaris,Caragana korshinskii,Salix linearistipularis in Ordos region were chosen to measure and analyze soil pH,organic matter,total nitrogen,total phosphorus,total potassium,ammonium nitrogen,available phosphorus and available potassium in soil.The data were standardized based on the membership function method,and the membership value of each index was determined,the weight of each index was determined by principal component analysis.Combined with the membership value and weight value,the comprehensive evaluation method was applied to evaluate the comprehensive fertility of soil under different forest types.The Nemero index method was used to inspect a conclusion for the comprehensive evaluation method.The results showed that,1) The soil pH were ranged from 7.31-10.46,and mean value of 8.35.2) In different study areas,the contribution rates of the seven factors to the comprehensive soil fertility ranking:total potassium(0.177)>available phosphorus(0.148)>ammonium nitrogen(0.138)>available potassium(0.134)>organic matter(0.127)>total phosphorus(0.099)>total nitrogen(0.057).3) The comprehensive evaluation method and the Nemerow index method to determine of soil comprehensive fertility quality were consistent trend,as followed:Hedysarum mongolicum plantation>Caragana tibetica plantation>Sabina vulgaris plantation>Caragana korshinskii plantation>Salix linearistipularis plantation.The soil in the study area belonged to alkaline soil.The high total potassium content in the soil had the highest contribution rate to the soil fertility of forest land.The soil had lower total nitrogen and total phosphorus,which was the main limiting factor of soil fertility in forest land.Hedysarum mongolicum plantation had higher soil fertility under the forest,and was better than other forests. |
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| Keywords: | MU Us sandy land membership function principal component analysis comprehensive evaluation of soil fertility Nemerow index method |
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