【摘要】 本文进一步探讨土壤施用有机物料后重组有机质的变化规律。测定了重组有机质中各种结合形态腐殖质组成和胡敏酸的光学性质。试验结果表明:土壤施用有机物料后,各种结合形态腐殖质的PQ在第一年基本上下降,第二年又回升。腐殖化度降低的幅度和持续时间,与有机物料种类和用量及其分解的环境条件有关。施用有机物料还能使松、稳结合态胡敏酸的△logk和E₄/E₆提高,RF降低,光密度曲线陡度加大。更多还原

【Abstract】 This paper deals with the effect of application of organic materials en improving soil fertility. Experiments showed-that PQ of various kinds of combined humus, in genera/, dropped in first year and rised back next year after organic materials were applied. The extent and time-keeping for the decrease of humification degree depended on the sorts and amounts of organic materials applied as well as the environment conditions under which the organic materials decomposed. The △ log k and E₄/E₆ of various kinds of humic acids increased, while their RF values decreased by application of organic materials. Loosely combined HA varied in a wider range than stably combined HA. The optical density curves in treatments of organic materials were not only higher but also steeper than those in the check.更多还原