作者
DJ Mulla, AL Page, TJ Ganje
发表日期
1980/7
来源
Journal of Environmental Quality
卷号
9
期号
3
页码范围
408-412
出版商
American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
简介
Soils from citrus groves that had been fertilized with the equivalent of approximately 175 kg P/ha per year [as treble superphosphate (TSP)] over a 36‐year period were sampled and analyzed for total P, Cd, and Zn as well as water‐soluble P and Cd. A P fertilization rate of 175 kg/ha (about 400 kg P2O5/ha) is much higher than normal field rates, which are typically about 30 kg/ha. Concentrations of total Cd in surface soil were highly correlated (r = 0.89) with concentrations of total P. The concentrations of Cd in surface soil receiving broadcast P for 36 years averaged 1.0 µg/g, and were considerably greater than those of the controls, which showed a mean concentration of 0.07 µg/g. Phosphorus in soil saturation paste extracts ranged from 0.10 µg/ml (controls) to 8.87 µg/ml in P fertilized soils. Water‐soluble saturation extract Cd ranged from 0.008 µg/ml in controls to 0.017 µg/ml in fertilized soils, and was not well …
引用总数
198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202423412324413624736514783274717713453326222