Fractionation of Added Cadmium in Submerged Soils asAffected by Organic MaterialsEnglish Full Text

WANG GUO; GAO SHAN; WANG YONGCHENG and CAI HAIYANG(Department of Land and Environmental Science, Fujian Agricultural University, Fuzhou 350002 (China))

Abstract: The effect of three organic materials （rice straw, Chinese milk vetch and pig manure） on the fractionationof cadmium added into two soils （a red soil and a fiuvo-aquic soil） was studied using submerged incubationexperiment. The organic materials increased soil solid organic carbon （SOC）, pH value, the concentration ofactive Si in all the treatments and active Fe and Mn in some treatments. Accumulated SOC caused directlythe increase of Cd bound to solid organic matter and consequently the decrease of exchangeable Cd. Higheractive Si and pH, as well as lower Eh, were also responsible for the reduction of exchangeable Cd. Cd boundto Mn oxide was positively correlated with pH values and rose significatly after one-month incubation, butdecreased after three-month incubstion. Cd bound to amorphous Fe oxide increased with the incubationtime, but was not effected significantly by adding organic materials.

Keywords：

cadmium; fractionation; organic materials; solid organic carbon （SOC）; submerged soil;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S153.61

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Fractionation of Added Cadmium in Submerged Soils asAffected by Organic MaterialsEnglish Full Text

WANG GUO; GAO SHAN; WANG YONGCHENG and CAI HAIYANG(Department of Land and Environmental Science, Fujian Agricultural University, Fuzhou 350002 (China))

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