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Abstract Detail

Recent Topics Posters

May , William (Bill) [1], Lyons, Caitlyn [2].

The effect of Nitrogen and Seeding Rate on Sunflowers in a No-till Environment.

Sunflowers have been traditionally seeded using a row crop planter into a tilled soil.  In segments of western Canada No-till is the predominant cropping system and row crop seeders are currently not being used widely.  No-till can change nitrogen dynamics and increased moisture available in the soil.   In addition the seed placement with an air drill is not as precise as a row crop planter which is important in sunflowers.  Therefore, two studies were conducted to investigate the nitrogen response of sunflowers and the optimum seeding rate of sunflowers in a no-till cropping system.  To test the effect of nitrogen fertilizer, 5 rates were used (10, 30, 50, 70 and 90 kg N ha-1) at several locations in two years.   To test the effects of plant density, 7 seeding rates (3.7, 4.9, 6.2, 7.4, 8.6, 9.9, and 11.1 plants m-2) with two oilseed lines , one hybrid and one open pollinated were used.  The optimum N rate was 70 to 90 kg ha-1, higher than found in previous research.  The optimum seeding rate was between 7.4 and 8.6 seeds m-2. This is higher than the rate recommended when a row crop planter is used.  In this study sunflowers were more responsive to nitrogen and a higher seeding rate is required when an air drill is used to seed the sunflowers.

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1 - Agriculture and Agri-Food Canada, Science and Technology, P.O. Box 760, Indian Head, SK, S0G 2K0, Canada
2 - University of Guelph, Guelph, ON, Canada

Helianthus annuus
plant population.

Presentation Type: Recent Topics Poster
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PRT049
Abstract ID:1835
Candidate for Awards:None

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