[Effect of submerging and wetting-redrying on Cd speciation and uptake by Sorghum hybrid Sudangrass in two paddy soils under spiked Cd].
Effect of continuous submerging and wetting-redrying on cadmium speciation and uptake by Sorghum hybrid Sudangrass in a Ferric-accumulic Stagnic Anthrosol and a Tipical Hapludult collected from the Taihu Lake region and the rolling downs of Yingtan, Jiangxi, China respectively, was studied by pot experiment with Cd spike in 2003. Compared to that under wetting-redrying treatment, the MgCl2-extracted pool of Cd in Huangnitu with spiked Cd of 5mg x kg(-1) and 10mg x kg(-1) was decreased from 21.8% and 28.5% to 8.0% and 16.9% while NH2OH x HCl-extracted pool increased from 17.7% and 17.3% to28.1% and 37.5% under continuous submerging. However, in the Typical Halpudult, NaAC-extracted pool of Cd decreased from 20.8% and 29.6% to 11.6% and 12.6%. Cd uptake by Sorghum hybrid Sudangrass was found in negative correlation with the MgCl2 extracted pool of Cd. Total Cd uptake was significantly reduced by the pretreatment of continuously submerging in Huangnitu.
Xiao
Si-si
SS
Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
Li
Lian-qing
LQ
Pan
Gen-xing
GX
Jiao
Shao-jun
SJ
Gong
Wei-qun
WQ