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Abstract Detail



Agronomy

King, Tom [1], Schoenau, Jeff [1], Hangs, Ryan [1], Ahmed, Hasan [1], Malhi, S.S. [2], Urton, Ron [1].

Effect of Sulfur Fertilizer Form on Wheat, Canola and Yellow Pea Yield and Sulfur Utilization in Three Saskatchewan Soils.

Sulfur (S) fertilizers are normally applied in canola production in Saskatchewan, and are also occasionally recommended for cereal and legume crops as well. The objective of this study was to examine the effect of S fertilizer nutrient source, including soluble sulfate (ammonium sulfate, potassium sulfate), insoluble (elemental S), liquid (ammonium thiosulfate) and slightly soluble (calcium sulphate “gypsum”) on wheat, canola and field pea yield and sulfur utilization. A two year field study was conducted on Brown, Gray-Black and Gray soils in Saskatchewan to evaluate the yield and plant uptake of available S from five S fertilizer forms applied in the seed row to hard red spring wheat, argentine canola and yellow pea at a rate of 20 kg S ha-1 alone and in combination with monoammonium phosphate (MAP) at a rate of 20 kg P2O5 ha-1. Overall, wheat and pea grain yield showed limited response to S fertilizer application at the three sites, reflecting low S nutrient requirements and moderate S soil fertility at the three sites. However, some positive yield responses of wheat were observed from soluble and slightly soluble S forms under the high spring rainfall conditions experienced at the Brown soil zone site in 2014. This was consistent with greater sulphate concentrations found in the seed-row of these sources following application, especially the calcium sulfate. Canola grain yield responded significantly to soluble sources and calcium sulfate at the Gray Luvisol site. For both years, yellow pea grain yield did not respond to S fertilization of the Gray-Black Chernozem and Gray Luvisol soils, and injury was sometimes observed from ammonium thiosulfate and phosphate placed in the seed-row with this crop. Seed-row sulfate content and crop S uptake was generally lowest with the elemental S.


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1 - University of Saskatchewan, Dept. of Soil Science, 51 Campus Drive, Saskatoon, SK, S7N 5A8, Canada
2 - Agriculture & Agrifood Canada, Melfort AAFC Station, Melfort, SK S0E 1A0, Melfort, SK, S0E 1A0, Canada

Keywords:
sulfur
soluble
insoluble
slightly soluble
liquid sulfur
seed row placement.

Presentation Type: Oral Paper:Papers for Topics
Session: 37
Location: Salon 2/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 9:00 AM
Number: 37004
Abstract ID:455
Candidate for Awards:CSA Graduate Student Competition for Best Paper Presentation


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