Camelina: Yield and quality response to nitrogen and sulfur fertilization in Poland

Crambe: Seed Yield and Quality in Response to Nitrogen and Sulfur—A Case Study in Northeastern Poland

“…As expected, C. abyssinica yields decreased with a rise in N rate (from 5.3 to 3.8 kg hulled seeds kg −1 N). Similar trends were reported in studies of C. sativa [63,68] and other Brassica crops (B. juncea, B. napus and B. rapa canolas, and B. juncea and S. alba mustards) [61].…”

“…Intact seeds (approximately 5 g) were placed in a standard ring cup and scanned. The content of total protein, crude fat, crude fiber, ADF, and NDF in crambe seeds, and the fatty acid composition of Abyssinian oil, were determined according to the procedures described by Jankowski et al [68].…”

“…Oilseed crops of the family Brassicaceae have high S requirements [81]. In soils with moderate levels of S (10-35 mg SO 2− 4 kg −1 soil [97], seed yields peaked in response to 20-30 kg S ha −1 in B. juncea (traditional and canola type cultivars), C. sativa, and C. abyssinica [68,81,84,85,98]; 40 kg S ha −1 in B. napus (spring cultivars) and S. alba; and 40 to 80 kg S ha −1 in B. napus (winter cultivars) [81,83,99]. The current study was conducted on Haplic Luvisol originating from boulder clay with moderate SO 2− 4 levels, and crambe yields increased up to the S rate of 15 kg ha −1 (5%), mainly due to the beneficial influence of S on TSW and, to a lesser degree, on the number of seeds plant −1 .…”

“…Sulfur fertilization plays a key role in the production of Brassica crops because it directly affects seed yield and yield components, and indirectly increases the efficiency of N fertilization [68,100,101]. In the present study, S fertilization increased NFUE when N was applied at rates higher than 30 kg N ha −1 , by 29-39% (60 kg N ha −1 ), 23-31% (90 kg N ha −1 ), and 22% (120 kg N ha −1 ).…”

“…The remaining Brassica crops, including C. sativa [62,67,68], B. juncea and B. rapa canolas, B. juncea and S. alba mustards [61,69], and S. alba canola [69], have an equally high demand for N. In oilseed crops of the family Brassicaceae, crude fat content is the most important quality trait which is negatively correlated with total protein content [70,71]. Nitrogen decreases the content of crude fat and increases the total protein content of seeds in Brassica crops [68,72,73]. A negative correlation between N fertilization and the oil and protein content of seeds is not observed only when N does not exert yield-forming effects [63].…”