将土壤有机质、全氮、全磷、全钾、速效氮、速效磷和速效钾作为评价指标,应用物元分析法建立综合评价模型,对玉树东南部森林土壤养分进行了评价,并对土壤养分限制因子的影响因素进行方差分析。结果表明:玉树东南部森林土壤整体养分状况良好,速效磷含量缺乏成为限制因子;林型和森林群落复杂性对速效磷影响显著(P=0.05),针阔混交林与复杂群落结构下速效磷含量最高。物元模型在评价过程中表现出优势,是土壤养分评价的理想方法。
The comprehensive evaluation model based on matter-element analysis method was applied to evaluation of the forest soil nutrient in southeast of Yushu,with the soil organic matter,total nitrogen,total phosphorus,total potassium,available nitrogen,available phosphorus and available potassium chosen as evaluation indexes.Results indicated that the situation of forest soil nutrient in southeast of Yushu was favorable,but the available phosphorus became the limiting factor due to its poor content among the seven indicators.Forest type and forest community complexity had significant effects on available phosphorus (P=0.05).Available phosphorus content under mixed needle leaf forest and complex community structure was highest.Matter-element model presented its advantage in the process of assessment,and was an ideal method for soil nutrient evaluation.
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