不同熟化度红壤及红壤性水稻土的腐殖质组成及其特性
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THE COMPOSITION AND PROPERTIES OF HUMUS IN THE CULTIVATED RED EARTH AND PADDY SOIL DERIVED FROM RED EARTH
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    摘要:

    土壤腐殖质是评价红壤肥力的重要因素[2],根据前人研究[8,3,1]:一般土壤腐殖质的含量及组成受土壤地带性的影响。胡敏酸与富啡酸的比值自南向北逐渐递增,红壤胡敏酸与富啡酸的比值小于1。本文着重研究同一地区自然成土因素类同的情况下,红壤通过水旱耕作和培肥,土壤腐殖质的组成及特性的变化。

    Abstract:

    The composition and properties of humus in the cultivated red earth is influenced to a great extent by farming measures. Especially, under the conditions of organic manuring and rice planting, the composition of humus may go beyond the influence of geographical zonality and degree of humification can be increased significantly, the valne of ΔlogK can be decreased gradually and the ratio of humic acid to fulvic acid may be more than 1. The ratio of H.A./F.A. in paddy soil derived from the red earth with higher fertility is 1.4, that in paddy soil with medium fertility is about 0.5 and that in paddy soil newly reclaimed is 0.2-0.3 which is similar to that in virgin red earth;and the ratio in dry farming red earth with higher fertility is about 0.9. All these mentioned above showed the characteristics of soil humus under cultivation and manuring of high yield rice, and the ratio of H.A./F.A. might be considered as the.main index of fertility of red earth. This study also showed that the variation of contents and properties of humus of red earth was restricted in the surface soil, and with the duration of cultivation it was gradually influenced in the other horizons of the profile.Because of excess of water and lack of oxygen, the composition of humic acid in paddy soils derived from red earth with lower and medium fertility is simpler than that in upland soils, though the humus in these soils is accumulated faster. After a long period of rice planting, the rotation of rice and upland crops can regenerate the soil organic matter and improve its quality, being conducive to the improvement.

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林明海,赖庆旺.不同熟化度红壤及红壤性水稻土的腐殖质组成及其特性[J].土壤学报,1982,19(3):237-247. Lin Min-hai, Lai Qing-wang. THE COMPOSITION AND PROPERTIES OF HUMUS IN THE CULTIVATED RED EARTH AND PADDY SOIL DERIVED FROM RED EARTH[J]. Acta Pedologica Sinica,1982,19(3):237-247.

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  • 在线发布日期: 2013-02-25
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