Record ID No. |
2812 |
Author(s) |
Gao XiaoPeng, Akhter F., Tenuta M., Flaten D N., Gawalko E J., Grant C A. , 2010 |
Affiliation |
Department of Soil Science, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada. tenutam@cc.umanitoba.ca |
Title |
Mycorrhizal colonization and grain Cd concentration of field-grown durum wheat in response to tillage, preceding crop and phosphorus fertilization. |
Source. Vol.(no):Page |
Journal of the Science of Food and Agriculture 90(5): 750-758p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Cropping effect |
Host |
Triticum turgidum L., canola (Brassica napus L.), flax (Linum usitatissimum L.). |
Organism |
AMF |
Country |
Canada, North America |
Abstracts |
A 3-year field trial was conducted to investigate the effect of agricultural management practices including tillage, preceding crop and phosphate fertilization on root colonization by arbuscular mycorrhizal (AM) fungi and grain cadmium (Cd) concentration of durum wheat (Triticum turgidum L.). The relationship between grain Cd and soil and plant variables was explored to determine the primary factors affecting grain Cd concentration. RESULTS: Mycorrhizal colonization of the roots was reduced by conventional tillage or when the preceding crop was canola (Brassica napus L.), compared to minimum tillage or when the preceding crop was flax (Linum usitatissimum L.). In contrast, grain Cd was not consistently affected by any treatment. Grain Cd was generally below the maximum permissible concentration (MPC) of 100 micro g Cd kg-1 proposed by WHO. Grain Cd varied substantially from year to year, and could be predicted with 70% of variance accounted for by using the model: grain Cd concentration=-321.9+44.5 x ln(grain yield)+0.26 x soil DTPA-Cd+182.5 x soil electrical conductivity (EC)-0.98 x grain Zn concentration. CONCLUSIONS: These common agricultural management practices had no effect on grain Cd concentration in durum wheat though they impacted mycorrhizal colonization of roots. Grain yield and to a lesser extent soil conditions of EC and DTPA-Cd and grain Zn influenced grain Cd, whereas mycorrhizal colonization levels did not. |