| 有机物料对淹水土壤中施入的镉形态的影响 |
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| 作者姓名： | WANG Guo GAO Shan WANG Yong-Cheng CAI Hai-Yang |
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| 作者单位： | [1]DepartmentofLandandEnvironmentalScience,FujianAgriculturalUniversity,Fuzhou350002,China [2]DepartmentofL,FujianAgriculturalUniversity,Fuzhou350002,China |
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| 基金项目： | *1Project (No.49671048) supported by the National Natural Science Foundation of China. |
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| 摘 要： | The effect of three organic materials(rice straw,Chinese milk vetch and pig manure)on the fractionation of cadmium added into two soils(a red soil and a fluvo-aquic soil) was studied using submerged incubation experiment.The organic materials increased soil soild organic carbon(SOC),pH value,the concentration of active Si in all the treatments and active Fe and Mn in some treatments.Accumulated SOC caused directly the increase of Cd bound to solid organic matter and consequently the decrease of exchangeable Cd.Higher active Si and pH,as well as lower Eh,were also responsible for the reduction of exchangeable Cd.Cd bound to mn oxide was positively correlated with pH values and rose significantly after one-month incubation,but decreased after three-month incubation.Cd bound to amporphous Fe oxide increased with the incubation time,but was not affected significantly by adding organic materials.
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| 关 键 词： | 淹没土壤 有机物 土壤镉 重金属吸附 影响 |
Fractionation of added cadmium in submerged soils as affected by organic materials |
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| WANG Guo,GAO Shan,WANG Yong-Cheng,CAI Hai-Yang.Fractionation of added cadmium in submerged soils as affected by organic materials[J].Pedosphere,1999,9(2):177-184. |
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| Authors: | WANG Guo GAO Shan WANG Yong-Cheng and CAI Hai-Yang |
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| Institution: | [1]DepartmentofLandandEnvironmentalScience,FujianAgriculturalUniversity,Fuzhou350002,China [2]DepartmentofL,FujianAgriculturalUniversity,Fuzhou350002,China |
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| Abstract: | The effect of three organic materials(rice straw,Chinese milk vetch and pig manure)on the fractionation of cadmium added into two soils(a red soil and a fluvo-aquic soil) was studied using submerged incubation experiment.The organic materials increased soil soild organic carbon(SOC),pH value,the concentration of active Si in all the treatments and active Fe and Mn in some treatments.Accumulated SOC caused directly the increase of Cd bound to solid organic matter and consequently the decrease of exchangeable Cd.Higher active Si and pH,as well as lower Eh,were also responsible for the reduction of exchangeable Cd.Cd bound to mn oxide was positively correlated with pH values and rose significantly after one-month incubation,but decreased after three-month incubation.Cd bound to amporphous Fe oxide increased with the incubation time,but was not affected significantly by adding organic materials. |
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| Keywords: | cadmium fractionation organic materials solid organic carbon (SOC) submerged soil |
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