Preceding crop and phosphorus fertilization affect cadmium and zinc concentration of flaxseed under conventional and reduced tillage

• Published in: Plant and soil Vol. 333; no. 1-2; pp. 337 - 350
• Main Authors: Grant, Cynthia A, Monreal, Marcia A, Irvine, R. B, Mohr, Ramona M, McLaren, Debra L, Khakbazan, Mohammad
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Springer Netherlands 01.08.2010; Springer; Springer Netherlands; Springer Nature B.V
• Subjects: Agronomy; Agronomy. Soil science and plant productions; Animal, plant and microbial ecology; Biological and medical sciences; Biomedical and Life Sciences; Cadmium; Canola; crop rotation; Ecology; Economic plant physiology; Fertilizers; Flaxseed; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Grain; Heavy metal; Life Sciences; linseed; mycorrhizae; Nitrogen, phosphorus, potassium fertilizations; Phosphorus fertilization; Plant Physiology; Plant Sciences; Plants; Regular Article; Seeds; Soil and water pollution; Soil pollution; Soil science; Soil Science & Conservation; Soil-plant relationships. Soil fertility. Fertilization. Amendments; Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...); Tillage; Trace element; Wheat; Zinc; Canada; Manitoba; Manitoba Canada; Linseed; Trace element; Crop rotation; Mycorrhiza; Heavy metal; Oilseed; Minimum tillage; Phosphorus fertilization; Preceding crop; Fiber crop; Linum usitatissimum; Linaceae; Dicotyledones; Angiospermae; Chemical concentration; Chemical properties; Symbiosis; Cultural practice; Cadmium; Soil tillage; Cropping system; Symbiont; Soil management; Zinc; Group IIB metal; Spermatophyta; Soil plant relation
• ISSN: 0032-079X; 1573-5036
• DOI: 10.1007/s11104-010-0349-7

Field studies were conducted over 4 years at two locations in Manitoba, Canada to evaluate effects of preceding crop, tillage and phosphorus (P) fertilization on Cd and Zn concentration in oilseed flax (linseed—Linum usitatissimum L.). Canola (Brassica napus L.) and spring wheat (Triticum aestivum L.) were grown under conventional and reduced tillage with three rates of monoammonium phosphate. Flax was seeded the year following the spring wheat or canola, with or without P fertilizer, and Cd and Zn concentration and accumulation were determined in the flax tissue at 5 weeks and in the mature seed. Flax following canola had lower Zn concentration and accumulation and higher Cd concentration and Cd:Zn ratio in the tissue and seed relative to flax following wheat. Phosphorus fertilization tended to increase Cd concentration and Cd:Zn ratio and decrease Zn concentration in the tissue and seed. Effects of tillage and interactions among tillage, preceding crop, and P fertilization were inconsistent. Changes in flax Cd and Zn concentration may be due to changes in mycorrhizal colonization or by the high concentration of Cd in the decomposing canola residue. Crop sequence and P management can be used to improve flaxseed food quality, by increasing Zn and decreasing Cd concentration.