Chemistry of Cr in some Swedish soils |
| |
Authors: | Erasmus Otabbong |
| |
Affiliation: | (1) Department of Soil Sciences, Swedish University of Agricultural Sciences, Box 7014, S-750 05 Uppsala, Sweden |
| |
Abstract: | The effect of Si(OH)4 on Cr toxicity and elemental concentrations in ryegrass were investigated in a growth chamber using an acid and a neutral mineral soil. Each soil was treated with 50 mg Cr, as CrO3, kg−1 soil dry weight, singly, or in combination with 25 mg Si as Si(OH)4. Plants growing in unamended soils were used as controls. Chromium toxicity, expressed as decrease in shoot or root dry weight, was increased by the Si. This increase was accompanied by a higher Cr uptake particularly on the acid soil. The shoot and root dry weights were significantly correlated (P=1%) with the concentration of Cr, where r=−0.80 and −0.65, respectively. Uptake of Al, Cu, Fe, P and Zn did not show any consistent relationship to the magnitude of Cr toxicity. |
| |
Keywords: | Lolium perenne dry weight shoots roots Al Cr Cu Fe P Zn |
本文献已被 SpringerLink 等数据库收录! |
|