| 淹水对两种水稻土氧化层和还原层铁氧化物转化和磷吸附的影响 |
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| 引用本文： | 章永松,林咸永. 淹水对两种水稻土氧化层和还原层铁氧化物转化和磷吸附的影响[J]. 浙江大学学报(农业与生命科学版), 2002, 28(5): 485-491 |
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| 作者姓名： | 章永松 林咸永 |
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| 作者单位： | 浙江大学农业化学研究所,浙江,杭州,210029 |
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| 基金项目： | Supported by National Natural ScienceFoundation ofChina(39770 4 2 6 ) and Zhejiang Provincial Nat-ural Science Foundation ofChina(3972 5 2 ) |
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| 摘 要： | 在实验室条件下对两种水稻在为期6周朱淹水过程中,其氧化层和还原层土壤中还原物质总量(TRS)、草酸盐可提取铁(Feo)、连二亚硫酸钠-柠檬酸-碳酸氢钠可提取铁(FeDCB)和磷吸附的变化进行了研究.结果表明:淹水可急剧增加新鲜土样中的TRS、Feo和磷吸附之间存着极显著的相关关系,表明淹水过程中土壤Eh的下降、致使FeDCB向结晶度差的Feo.转化是导致土壤对磷吸附显著增加的主要原因.
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| 关 键 词： | 氧化层 还原层 淹水 磷吸附 铁氧化物 水稻土 |
Relation between Fe-oxides transformation and phosphorus adsorption in the oxic and anoxic layers of two paddy soils as affected by flooding |
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| Abstract. Relation between Fe-oxides transformation and phosphorus adsorption in the oxic and anoxic layers of two paddy soils as affected by flooding[J]. Journal of Zhejiang University(Agriculture & Life Sciences), 2002, 28(5): 485-491 |
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| Authors: | Abstract |
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| Abstract: | The changes of total reducing substances (TRS), oxalate extractable Fe (Fe o), dithionite citrate bicarbonate extractable Fe (Fe DCB ) and phosphorus adsorption (P adsorption) in oxic and anoxic layers of two paddy soils during 6 week flooding were examined under laboratory conditions. It was found that TRS, Fe o, and P adsorption in fresh samples were sharply increased by flooding, and significantly higher in anoxic layers than in oxic layers of the submerged soils. The significant correlation (at 1% level) between TRS, Fe o and P adsorption suggested that the substantial increase of P adsorption caused by flooding was ascribed to the reducing process of soil Eh resulting from flooding, transformation of Fe DCB to Fe o, and poor crystallinity of soil iron oxide induced by low Eh. |
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| Keywords: | oxic layer anoxic layer flooding P adsorption Fe oxides paddy soils |
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