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选择黄土高原地区典型人工林为研究对象,以土壤容重、质地、有机质、养分、矿质全量等为指标,对不同恢复时期人工林改良土壤的效应进行了研究,并采用新复极差法分析了有机质及养分含量的差异显著性,最后应用综合指数法进行检验。结果表明:(1)沙棘林中中龄林土壤肥力质量最高,过熟林较低,幼林最低;(2)油松成林和刺槐成林各项肥力指标与其中幼林和撂荒地都呈极显著性差异;(3)同龄刺槐林土壤肥力质量高于油松林。
Taking the typical plantations in the Loess Plateau as the research object, the effects of plantation soil improvement in different restoration periods were studied based on the indexes of soil bulk density, texture, organic matter, nutrients and mineral content, and the results were analyzed by the new complex difference method Organic matter and nutrient content of significant differences, the final application of the composite index test. The results showed that: (1) The soil fertility of the middle-aged forest was the highest in the seabuckthorn forest, the over-mature forest was the lowest, and the young forest was the lowest. (2) The fertility index of Pinus tabulaeformis forest and Robinia pseudoacacia forest, Significant difference; (3) The soil fertility of Robinia pseudoacacia plantation was higher than that of Pinus tabulaeformis forest.