Optimizing combining green manures and pelletized manure for organic spring wheat production

Author:

Alam Mohammed Z.1,Lynch Derek H.1,Tremblay Gilles2,Gillis-Madden Rosalie3,Vanasse Anne4

Affiliation:

1. Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada.

2. Ministère de l’Agriculture, des Pêcheries et de l’Alimentation, 1355, rue Johnson Ouest, Saint-Hyacinthe, QC J2S 8W7, Canada.

3. Perennia, Food and Agriculture, Inc., Kentville, NS B4N 1J5, Canada.

4. Département de Phytologie, Université Laval, 2425, rue de l’Agriculture, Québec, QC G1V 0A6, Canada.

Abstract

Well-planned crop rotations and targeted use of organic amendments are critical to success in organic wheat production. The impact of green manure (GMr) type, GMr termination timing, and “Acti-Sol” [pelletized dehydrated poultry manure (DPM); 5-2-3] on organic wheat productivity and quality was evaluated from 2014 to 2016 in Truro, NS, and Saint-Mathieu-de-Beloeil, QC. Crops prior to wheat were soybean or GMr of hairy vetch/oat (HVO), common vetch/oat (CVO), and red clover (RC) (NS site), and HVO, red clover/oat (RCO), and oat (QC site). Trials were split-split-plot designs with treatments of precrops, GMr termination (fall vs. spring), and DPM at 0, 40, 80, and 120 kg total N ha−1. Wheat yields ranged from 1500 to 1800 kg ha−1 if unfertilized with DPM and following soybean or oat precrops. All legume GMrs (HVO, CVO, and RC/RCO) and DPM applications increased grain yield (2000–4200 kg ha−1) and protein content (13%–16%), wheat total N uptake [49–60 kg N ha−1 (QC); 87–125 kg N ha−1 (NS)] and soil mineral N content mid-season and postharvest, and responses were consistently greatest following HVO. Timing of GMr incorporation largely had no impact. Applying DPM at 80 kg N ha−1 was an effective substitute for a GMr precrop.

Publisher

Canadian Science Publishing

Subject

Soil Science

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