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• W2385473612 abstract "The aim of this study was to investigate the dynamics of dissolved organic matter (DOM) and its effect on cadmium availability in paddy soil amended with green manure(Vicia faba L.), pig manure, and ferilizer in field micro-plot trial with rice (Orysa sativa L.). The results showed that the concentration of DOM in the organic wastes-treated soils was increased drastically, as compared to the control treatment without the addition of organic wastes. The concentration of DOM in the organic wastes-treated soils decreased with rice growth, while the concentration of DOM in control treatment was similar throughout rice growth. Throughout the growing season, the concentrations of DOM in root zone were higher than those in the bulk soil, and increased with rice growth and reached maximum in rice flowering. The highest concentrations of DOM in root zone soil were 14.02?mg·L~(-1) for green manure treatment, 11.12?mg·L~(-1) for pig manure treatment, and 10.85?mg·L~(-1) for the control. DOM concentrations in all treatments decreased in later stage of rice growth. It was also observed that after rice harvested the concentrations of exchangeable and organic-bound cadmium in soils treated with the organic matters increased by around 2-folds. The results also revealed that there was a significant correlation between the concentrations of DOM in rhizospheric or bulk soil and exchangeable cadmium with r=0.9266~(*Abstract:The aim of this study was to investigate the dynamics of dissolved organic matter (DOM) and its effect on cadmium availability in paddy soil amended with green manure(Vicia faba L.), pig manure, and ferilizer in field micro-plot trial with rice (Orysa sativa L.). The results showed that the concentration of DOM in the organic wastes-treated soils was increased drastically, as compared to the control treatment without the addition of organic wastes. The concentration of DOM in the organic wastes-treated soils decreased with rice growth, while the concentration of DOM in control treatment was similar throughout rice growth. Throughout the growing season, the concentrations of DOM in root zone were higher than those in the bulk soil, and increased with rice growth and reached maximum in rice flowering. The highest concentrations of DOM in root zone soil were 14.02?mg·L~(-1) for green manure treatment, 11.12?mg·L~(-1) for pig manure treatment, and 10.85?mg·L~(-1) for the control. DOM concentrations in all treatments decreased in later stage of rice growth. It was also observed that after rice harvested the concentrations of exchangeable and organic-bound cadmium in soils treated with the organic matters increased by around 2-folds. The results also revealed that there was a significant correlation between the concentrations of DOM in rhizospheric or bulk soil and exchangeable cadmium with r=0.9266~(**) (n=8) for bulk soil and r=0.9389~(**) (n=8) for rhizoshperic soil. It implied that the application of organic wastes to remediate metal contaminated soils should be taken cautiously." @default.
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• W2385473612 date "2004-01-01" @default.
• W2385473612 modified "2023-09-25" @default.
• W2385473612 title "Dynamics of dissolved organic matter and its effect on metal availability in paddy soil: Field micro-plot trials" @default.
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