SE Asia trace elements paddy soils irrigation heavy metals
Issue Date:
2008
Publisher:
ĐHQGHN
Citation:
VNU Journal of Science, Earth Sciences 24 (2008) 87‐95
Abstract:
Reusing domestic wastewater for irrigation and applying biosolids as a fertiliser in crop
production are common practices in peri‐urban areas of Vietnam. This study investigates the effects
of using domestic wastewater in field experiments on Fluvisols soils in peri‐urban areas of Hanoi
and Nam Dinh cities. We compared long‐term (30‐50 years) wastewater‐irrigated rice‐dominated
farming systems. Using wastewater for irrigation significantly affected pH, electrical conductivity
(EC), exchangeable K and Na and reverse aqua regia‐digestible (Rev Aq Reg) copper (Cu), lead (Pb)
and zinc (Zn) in the investigated areas compared with control plots irrigated using river water.
There were no significant effects of wastewater irrigation on the NH4NO3‐extractable fraction of
cadmium (Cd) and other trace metals, but the EDTA‐extractable fraction of Cu, Pb and Zn was
significantly increased.
Description:
VNU Journal of Science, Earth Sciences. Vol 24 (2008), No. 2, P. 87‐95
