Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8852084 | Chemosphere | 2018 | 31 Pages |
Abstract
The effect of exogenous phosphate (P, 200â¯mgâ
kgâ1 soil) on the lability and phytoavailability of arsenic (As) was studied using the diffusive gradients in thin films (DGT) technique. Lettuce were grown on the As-amended soils following the stabilization of soil labile As after 90 days incubation. Phosphate (P) application generally facilitated plant growth except one grown on P-sufficient soil. Soil labile As concentration increased in all the soils after P application due to a competition effect. Plant As concentration increased in red soils collected from Hunan Province, while decreases were observed in the other soils. Even though, an overall trend of decrease was obtained in As phytoavailability along with the increase of DGT-measured soil labile P/As molar ratio. The functional equation between P/As and As phytoavailability provided a critical value of 1.7, which could be used as a guidance for rational P fertilization, thus avoiding overfertilization.
Keywords
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Jinjin Wang, Xibai Zeng, Hao Zhang, Yongtao Li, Shizhen Zhao, Shiming Su, Lingyu Bai, Yanan Wang, Tuo Zhang,