Cadmium in crop residues and phosphate fertilizer influences crop cadmium concentration
Field studies were conducted for five years at seven locations across the Canadian prairies to evaluate the impact of application of monoammonium phosphate fertilizer varying in Cd concentration on Cd concentration in durum wheat (Triticum turgidum L.) and flax (Linum usitatissimum L.). Cadmium concentration in the seed of both crops increased with application of P fertilizer, even when the fertilizer contained only trace concentrations of Cd. However, crop Cd concentration was higher when the fertilizer added contained higher Cd concentrations, particularly when rate of fertilizer application was also high. The impact of Cd concentration in the fertilizer became more apparent with repeated applications over time. In growth chamber studies using durum wheat residue collected from the field sites, it was determined that the Cd concentration of flax increased with application of residue and with the Cd concentration of the residue applied. It may be possible to reduce Cd concentration of crops by reducing P application rate and Cd concentration of P fertilizers, or by removing crop residue prior to growing crops where Cd concentration is a concern.
Cd cycling crop residues monoammonium phosphate Linum usitatissimum Triticum turgidum
C. A. Grant L. Eastley D. Flaten E. Gawalko M. Tenuta
Agriculture and Agri-Food Canada, Brandon Research Centre, Box 1000A, R. R. ＃3, Brandon, MB, Canada, Canadian Grain Commission, 600-303 Main Street, Winnipeg, Manitoba, Canada R3C 3G8 Department of Soil Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
607-608
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）