| 祁连山大野口流域青海云杉林土壤肥力评价 |
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| 引用本文： | 齐鹏,刘贤德,赵维俊,张仁陟.祁连山大野口流域青海云杉林土壤肥力评价[J].草原与草坪,2015(4):37-43. |
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| 作者姓名： | 齐鹏 刘贤德 赵维俊 张仁陟 |
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| 作者单位： | 1. 甘肃农业大学 资源与环境学院,甘肃 兰州,730070;2. 甘肃农业大学林学院,甘肃 兰州,730070 |
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| 基金项目： | 甘肃省高等学校科研项目，甘肃农业大学盛彤笙基金，甘肃省博士后基金 |
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| 摘 要： | 以祁连山中段青海云杉林土壤为研究对象,分析了自然状态下森林土壤养分各项指标含量与肥力之间的关系。结果表明:研究区青海云杉林土壤理化性质指标值相对较适宜林分生长,有机质含量与全氮、全钾、全磷、铵态氮、硝态氮都存在很高的相关关系,同时全氮与铵态氮、硝态氮也存在很高的相关关系;采用多元统计的主成分分析法对土壤肥力进行综合评价,得出土壤肥力指标前2个主成分的累计贡献率为99.298%,有机质、全钾、全磷、硝态氮、铵态氮等代表了研究区土壤自然肥力的水平,对土壤肥力有正向负荷;土壤肥力模糊综合评价结果为高。
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| 关 键 词： | 青海云杉林 肥水评价 主成分分析 |
Evaluation of soil fertility in Picea crassifolia forest in Dayekou basin of Qilian Mountains |
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| Abstract: | In this paper,the relationship between the soil fertility and its nutrient indices in the Picea crassi-folia forest has been studied in the middle of Qilian Mountains.The resluts indicated that the physical and chemical properties of soil in Picea crassifolia forest were relatively suitable for forest growth.There was high correlation between soil organic matter contents and total nitrogen,total potassium,total phosphorus,ammoni-um nitrogen and nitrate nitrogen.Meanwhile,there were high relationship between the total nitrogen and ammo-nium nitrogen,nitrate nitrogen .Used multivariate statistical principal component analysis to evaluate soil fertil-ity,the cumulative contribution of the first and second principal components of soil fertility indicators were 99.298%,and therefore they are sufficient to reflect the information of original soil fertility.The Principal com-ponent analysis of the soil fertility showed that the contents of organic matter,total potassium,total phosphor-us,nitrate nitrogen,ammonium nitrogen could basically represent the natural fertility of the soil and showed the positive load to the soil fertility.Fuzzy comprehensive evaluation of soil fertility has highest grade. |
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| Keywords: | Picea crasifolia forest evaluation of the fertility principal component analysis |
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