红壤性水稻土的形成过程特点及其肥力演变
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CHARACTERS OF PADDY SOIL DERIVED FROM RED EARTH IN FORMING PROCESS AND ITS FERTILITY EVOLUTION
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    摘要:

    红壤性水稻土形成过程中,物质转化和移动是在淹水还原占优势的周期性干湿交替和氧化还原交替条件下进行的。它不仅加速有机质的积累,而且E.H./T.H.值和H.A./F.A.比值增大。复盐基作用使酸性和盐基高度不饱和的红壤,发育成为盐基饱和度相当高的红壤性水稻土。氧化还原和络合等淋移作用,导致化学元素在土体中重新分配,红壤富铝化过程减缓,有利于水稻土的培肥熟化。土壤物理性质和剖面特征也发生相应的改变,形成具有核块状结构、胶膜和铁、锰斑淀积明显的渗积层(P层);结构改善;肥力不断提高。上述变化与植稻年限呈正相关趋势,可把红壤性水稻土形成过程划分为雏型淹育型阶段;过渡渗育型阶段;十年左右初步形成具有水稻土基本属性的渗育型水稻土。

    Abstract:

    In the forming process of paddy soil derived from red earth,transformation and movement of matter are proceeded under the conddtions of oxidation-reduction and periodical alternation of drying and wetting in which the submerging reduction is dominant.The condition not only promote the accumulation of organic matter,but also the ratios of E.H./T.H.and H.A./F.A..The reaccumulation of bases can make the acid and base-unsaturated red earth develop info paddy soil derived from red earth with very high degree of base saturation.The eluviation process induced by oxidation-reduction and compleaation result in redistribution of chemical elements in solum and alleviate the allitic process of red earth,which are favorable for maturation and Fertility promotion of paddy soil.The soil physical properties and characters of soil profiles are also changed due to the conditions mentioned above.The pcrcosubmergic horizon with cloddy structure,coatings and the obvious illuviation of Fe and Mg is formed.Soil structure and fertility are improved.The changes mentioned above are positively related to the years of planting rice.The forming process of paddy soil derived from red earth could be divided into two stages,i.e.the stage of embryonic pattern due to submerged condition and the stage of transitional pattern due to perco-genetic process.The perco-genetic paddy soil with basic characteristics of paddy soil can be formed preliminaryly in ten years.

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邓铁金,樊友安,周任发.红壤性水稻土的形成过程特点及其肥力演变[J].土壤学报,1985,22(1):1-12. Deng Tiejin, Fan Youan, Zhou Renfa. CHARACTERS OF PADDY SOIL DERIVED FROM RED EARTH IN FORMING PROCESS AND ITS FERTILITY EVOLUTION[J]. Acta Pedologica Sinica,1985,22(1):1-12.

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  • 在线发布日期: 2013-02-25
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