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Sahota, Dr. Tarlok Singh [1].

Effect of urea, ESN and ammonium sulphate on barley for grain and silage production in northwestern Ontario.

Sahota, T. S. 2015. Effect of urea, ESN and ammonium sulphate on barley for grain and silage production in northwestern Ontario. Paper presented at the Plant Canada Conference “Botany 2015 – Science and Plants for People”, Edmonton, Alberta on July 25-29, 2015. Urea, the predominant N fertilizer for crop production in Ontario/Canada, is subject to high N losses. ESN, a slow release N fertilizer, could be an alternative to urea; though in cold weather it may be too slow to release N, especially for spring cereals. Part application of N from ammonium sulphate (AS) could meet sulphur requirements of crop plants. A set of two field experiments, on barley for silage/and grain production, with 7 treatments, including a no N check, 70 kg N ha-1 from urea/or ESN or blends of the two fertilizers/and their blends with AS, was conducted in completely randomized block design, replicated four times, during 2013-’14 at Thunder Bay, Ontario. Averaged over 2 years, it was found that application of 70 kg N ha-1 from urea/or ESN increased the barley grain and silage yields by over 1.5 Mg ha-1. Both urea and ESN produced similar grain and silage yields. Part substitution of N (10 kg N ha-1) from urea/or ESN with AS or the combined application of the three fertilizers in 4:2:1 proportion on N basis, didn’t significantly improve the grain or silage yield. Application of N from urea @ 50 kg N ha-1 and ESN @ 20 kg N ha-1 (at an extra cost of only $6 ha-1) increased the barley grain yield marginally, but improved the silage yield significantly (by 1.25 and ~1.5 Mg ha-1 as compared to urea/and ESN @ 70 kg N ha-1. Grain protein content varied from 11 % in check to 12.1 % in ESN @ 70 kg N ha-1/and urea @ 60 kg N ha-1 + ESN @ 20 kg N ha-1. Application of N @ 70 kg ha-1 improved the forage protein content by/up to 2 % points. At equal N rates, forage protein content was somewhat higher with ESN (12.8 %) than urea (12.3 %), but a little lower than urea @ 60 kg N ha-1 + AS @ 10 kg N ha-1 (13.1 %).

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1 - Thunder Bay Agricultural Research Station, 435 James St. S, , Thunder Bay, ON, P7E 6S7, Canada

Ammonium sulphate
Biomass yield and quality
seed protein.

Presentation Type: Oral Paper:Papers for Topics
Session: 62
Location: Salon 8/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 10:30 AM
Number: 62009
Abstract ID:1033
Candidate for Awards:None

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