Crambe: Seed Yield and Quality in Response to Nitrogen and Sulfur—A Case Study in Northeastern Poland
2020
Mateusz Sokólski | Dariusz Załuski | Krzysztof Jankowski
The aim of this study was to determine the effect of nitrogen (0, 30, 60, 90, 120 kg ha&minus:1) and sulfur (0, 15, and 30 kg ha&minus:1) fertilization on the morphometric parameters of plants, seed yield components, seed and straw yield, N fertilizer use efficiency (NFUE), and quality of crambe seeds. The experiment had a randomized complete block design, and it was carried out in Bałcyny (northeastern Poland) in 2017&ndash:2019. In northeastern Poland, the average seed yields ranged from 0.96 to 1.64&ndash:1.82 Mg ha&minus:1 (hulled seeds). Seed yield increased significantly in response to 120 kg N ha&minus:1 and 15 kg S ha&minus:1. The NFUE of crambe decreased by 28% with a rise in N rate. Hulled crambe seeds accumulated 324&ndash:394 g kg&minus:1 DM of crude fat, 208&ndash:238 g kg&minus:1 DM of total protein, and 118&ndash:137 g kg&minus:1 DM of crude fiber. Nitrogen fertilization decreased the crude fat content (by 6%), and it increased the total protein content (by 11%) and the crude fiber content (by 14%) of crambe seeds. Sulfur fertilization increased crude fat content (by 4&ndash:5%) without inducing significant differences in the total protein content and the crude fat content of seeds.
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