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作 者 ：杨玉盛 何宗明 俞新妥 黄振华 肖火盛

期 刊 ：林业科学 1997年 33卷 zk1期 页码：31-38

关键词：炼山；土壤腐殖质。HA/FA。E4值；松紧比(I/Ⅲ)；土壤肥力；

Keywords:Controlledburning, Soilhumus, HA/FAvalue, E4value, Looseanddensecom-binedhumusratio(I/Ⅲ), Soilfertility,

摘 要 ：对杉木林、马尾松林和常绿阔叶林火烧前后的表层土壤腐殖质及肥力的研究结果表明：炼山后表层土壤有机质和全N降低，土壤生化活性增强，土壤速效性养分供应量增强；表层土壤腐殖质、HA/FA比值、胡敏酸、E₄值下降、E₄/E₆值变大，表层土壤松结合态和紧结合态腐殖质含量及其比例下降，土壤腐殖质活化度降低，这不利于林地土壤良好通透性及土壤肥力保持。

Abstract:The surface soil layer humus and fertility in Chinese fir，Pinus massoniana and evergreen broad leaved forests before and after controlled burning were studied．After controlled burning，the soil or-ganic matter and total N of surface soil layer decreased．the activities of soil biochemistry strength-ened,the amount of available nutrient supply enhanced．Soil humus，the ratio of HA/FA，humic acid and E₄ value decreased， E₄/E₆ elevated，loosely and tightly combined humus contents and its ratio deseended，the activation of soil humus decreased．It was unfavov able to maintain ventilation penetration and forest soil fertility．

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