2010全国生物材料大会论文集之 (982).pdf

Cadmium uptake by paddy rice and soil available Cd
under water flooding as affected by nitrogen
fertilizer

QIN Yu-sheng1,2 WANG Zheng-yin1*
1 College of Resources and Environment, Southwest 1 College of Resources and Environment, Southwest
University, University,
Chongqing, China Chongqing, China
2. Soil and Fertilizer Institute,
Sichuan Academy of Agricultural Sciences,
Chengdu, China
2*
JIAKA La-tie2 TU Shi-hua
2. Soil and Fertilizer Institute, 2. Soil and Fertilizer Institute,
Sichuan Academy of Agricultural Sciences, Sichuan Academy of Agricultural Sciences, Chengdu, China
Chengdu, China

Abstract—In order to tackle the problem of Cd pollution in level of mg·Cd kg-1 set by the state for the pollution-free rice
paddy soils and investigate soil available Cd as affected by production.
nitrogen fertilizers, incubation and pot experiments were carried Keywords-nitrogen fertilizer; paddy rice; soil available cadmium;
out to study effects of different nitrogen fertilizers and rates of cadmium uptake
urea on cadmium uptake by paddy rice and soil available Cd
I. INTRODUCTION
under water flooding condition. Results revealed that soil pH
Cadmium (Cd) is one of the important environmental
increased sharply after the soil was flooded, especially at the pollutants. It goes in the human body by the food chain and is
b