第四纪红粘土发育的红壤在施用石灰和石膏后元素的淋溶特征
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* 国家自然科学基金(49571043);中国科学院重大基金(KZ95T-04-01)


CHARACTERISTICS OF ELEMENT LEACHING OF RED SOIL DERIVED FROM QUATERNARY RED CLAY SUPPLIED WITH LIME AND GYPSUM
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    摘要:

    本文利用模拟土柱试验研究了施用石灰和石膏对第四纪红粘土发育的红壤中元素淋溶过程的影响。结果表明,施用石灰后10cm土层中除Ca2+以外的阳离子元素的淋失量减少,而SO42-;和HCO3-的淋失量增加;施用石膏后10cm土层中所有阳离子元素、特别是Al>3+的淋失量增加。红壤中Ca2+的淋失以自由态为主,施用石膏后与SO42-结合的比例增加。不同处理中30cm土层处铝的淋失以自由态为主;10cm土层处铝的淋失在石灰处理中以羟基铝为主,在石膏处理中初期与SO42-结合的比例增加,后期主要以自由态淋失。除了施用石灰的表层红壤溶液中羟基铝比例增加外,在所有的亚表层红壤溶液中以及施用石膏的表层红壤溶液中与SO42-结合的铝比例增加。

    Abstract:

    The effect of applying lime and gypsum on element leaching in red soil derived from Quaternary red clay was studied with soil columns repacked in laboratory.Results showed that lime application decreased the leaching from the short columns (0-10cm layer) of canons exclude Ca2+,but increased the leaching of SO42- and HCO3-.Supplying gypsum increased the leaching, from topsoil column of all cations,especially of Al3+,but has no effect on the leaching of HCO3.Ca2+ leached mainly in the form of free ion, and the percentage of SO bound Ca2+ rose when adding gypsum. For the leaching of A13+ from the long column(0-30 cm layer), it was mainly in the form of free ion.For the leaching of Al>3+ from the topsoil column, it was mainly in the form of OH- bound Al>3+ in lime treated soil;however,the main form was SO42- bound Al in the early stage and free ion in the later stage in gypsum treated soil. Besides that the percentage of OH- bound Al>3+ enhanced in the topsoil solution in all lime-addition soils, that of SO42- bound Al>3+ increased in all subsoil solution and in topsoil solution in gypsum treated soils.

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孙波,R. Moreau, R. Poss, A. Aventurier, P. Fallavier.第四纪红粘土发育的红壤在施用石灰和石膏后元素的淋溶特征[J].土壤学报,2000,37(1):50-61. DOI:10.11766/trxb199804140107 Sun Bo, R. Moreau, R. Poss, A. Aventurier, P. Fallavier. CHARACTERISTICS OF ELEMENT LEACHING OF RED SOIL DERIVED FROM QUATERNARY RED CLAY SUPPLIED WITH LIME AND GYPSUM[J]. Acta Pedologica Sinica,2000,37(1):50-61.

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  • 收稿日期:1998-04-14
  • 最后修改日期:1998-10-26
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  • 在线发布日期: 2013-02-25
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