| Effect of Submergence on Iron Transformation and Phosphorus Availability in Calcareous Soils |
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| 作者姓名： | ZHU XIAO-PING CAO CUI-YU YIN JIN-LAI ZHOU CHUN-LIN |
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| 作者单位： | [1]NanjingAgriculturalUniversity,Nanjing210014（China） [2]AgriculturalInstituteofCoastalAreas,JiangsuProvinc |
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| 基金项目： | A part of the project supported by the Laboratory of Material Cycling in Pedosphere, Academia Sinica. |
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| 摘 要： | A thermostatic incubation experiment was carried out to estimate the effects of flooding periods,stalk application and P addition of Fe transformation and P availability in calcareous soils.Submergence increased amorphous Fe,especially in the case of stalk application.The newly formed amorphous Fe with a great surface area played an important role in Psorption;and submergence also stimulated the dissolution of inorganic P,thus increasing the availability of soil P in calcareous soils.Meanwhile,a part of soluble P was absorbed and fixed again on the surface of newly formed amorphous Fe,thus resulting in a decrease of P availability.Soil rapidly available P increased after 150-day incubation.There existed significantly negative correlations between soil amorphous Fe content and soil Fe-P and rapidly available P contents.Submerged conditions promoted the transformation of inorganic P added toward Fe-P in calcareous soils,especially in the case of stalk application.
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| 关 键 词： | 石灰质土壤 铁转化 铁形态 可利用性磷 浸没 |
Effect of Submergence on Iron Transformation and Phosphorus Availability in Calcareous Soils |
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| ZHU XIAO-PING,CAO CUI-YU,YIN JIN-LAI,ZHOU CHUN-LIN.Effect of Submergence on Iron Transformation and Phosphorus Availability in Calcareous Soils[J].Pedosphere,1993,3(4):331-339. |
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| Authors: | ZHU XIAO-PING CAO CUI-YU YIN JIN-LAI and ZHOU CHUN-LIN |
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| Institution: | Nanjing Agricultural University, Nanfng 210014;Agricultural Institute of Coastal Areas, Jiangsu Province, Yancheng 224002;Nanjing Agricultural University, Nanfng 210014;Agricultural Institute of Coastal Areas, Jiangsu Province, Yancheng 224002;Nanjing Agricultural University, Nanfng 210014;Agricultural Institute of Coastal Areas, Jiangsu Province, Yancheng 224002;Nanjing Agricultural University, Nanfng 210014;Agricultural Institute of Coastal Areas, Jiangsu Province, Yancheng 224002 |
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| Abstract: | A thermostatic incubation experiment was carried out to estimate the effects of flooding periods,stalk application and P addition of Fe transformation and P availability in calcareous soils.Submergence increased amorphous Fe,especially in the case of stalk application.The newly formed amorphous Fe with a great surface area played an important role in Psorption;and submergence also stimulated the dissolution of inorganic P,thus increasing the availability of soil P in calcareous soils.Meanwhile,a part of soluble P was absorbed and fixed again on the surface of newly formed amorphous Fe,thus resulting in a decrease of P availability.Soil rapidly available P increased after 150-day incubation.There existed significantly negative correlations between soil amorphous Fe content and soil Fe-P and rapidly available P contents.Submerged conditions promoted the transformation of inorganic P added toward Fe-P in calcareous soils,especially in the case of stalk application. |
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