Soybean Phenology in the Canadian Prairies
2022
Ort, Nathaniel W.W. | Morrison, M.J. | McAndrew, D. | Cober, E.R. | Lawley, Y.E.
Non-Peer Reviewed
Show more [+] Less [-]The expansion of soybean [Glycine max (L.) Merr.] production onto the Canadian Prairies has resulted in new environmental constraints that affect soybean phenology and seed yield. This study examined these factors for ten soybean cultivars differing in maturity group (MG) rating from 000.9 to 1.3 in southern Manitoba (MB) and eastern Ontario (ON). Detailed climate and phenological data collected at both locations were used to explore the environmental factors and differences in measurements among MG and between locations. In MB more time was spent in vegetative growth and less time in flower and seed development than in ON. The longer vegetative growth stage in MB resulted in more main stem leaves at flowering than were in ON. In MB seed yield was positively correlated with precipitation in all growth stages and had a strong correlation with precipitation during reproductive development. In ON increasingly warmer temperature during reproductive development had the greatest influence on seed yield. This study is a baseline for soybean phenology, seed yield, and seed quality components for early MG in the Canadian Prairies and will aid in optimizing soybean breeding programs and production in this northern growing environment.
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