Quality of western Canadian canola 2012
As in 2011, the 2012 canola crop showed regional differences in oil, protein, chlorophyll contents and in fatty acid composition. The 2012 harvest showed a lower number of samples graded Canola, No. 1 Canada (83.2%) than the 2011 harvest (85.2%). However, grade distribution showed important regional differences - 87.6% of samples from Manitoba received the grade Canola, No. 1 Canada versus 78.2% from Saskatchewan and 82.9% from Alberta (plus Peace River area of British Columbia).
The 2012 Western Canadian canola (Canola, No. 1 Canada) crop was characterized by a significant decrease in oil content (43.5 versus 45.2%) and a higher protein contents (21.3 versus 19.6%) when compared to the 2011 Canola, No. 1 Canada crop. The average of the Canola, No. 1 Canada chlorophyll content was higher in 2012 than in 2011 and 2010 – 17.4 mg/kg versus 15.9 and 12.6 mg/kg, respectively. The 2012 canola crop had similar oleic acid, linoleic acid and α-linolenic acid contents when compared to the 2011 crop (62.5, 19.2 and 9.6 % versus 62.1, 19.1 and 9.9% for oleic, linoleic acid, and α-linolenic acid respectively). Total saturated fatty acid content was slightly lower than what was observed in 2011 (6.6 versus 6.8% in 2011). This resulted in a similar iodine value when compared to 2011 (113.3 in 2012 versus 113.6 units in 2011). The mean free fatty acid levels in Canola, No. 1 Canada seed was similar that what was observed in 2011 (0.14 versus 0.12%).
|Quality parameter||2012||2011||2010||2007-2011 Mean|
|Number of received samples||2108||1749||1641||1755|
|Number of Canola, No. 1 Canada samples||1716||1492||1276||1528|
|Oil contentFootnote 1 (%)||43.5||45.2||44.3||44.4|
|Protein contentFootnote 2 (%)||21.3||19.6||20.1||20.4|
|Oil-free proteinFootnote 2 (%)||40.6||38.8||39.0||39.6|
|Chlorophyll content (mg/kg in seed)||17.4||15.9||12.6||13.9|
|Total glucosinolatesFootnote 1 (µmoles/g)||10.9||10.3||9.9||10.6|
|Free fatty acids (%)||0.14||0.12||0.16||0.14|
|Oleic acid (% in oil)||62.5||62.1||62.3||62.3|
|Linoleic acid (% in oil)||19.2||19.1||18.8||9.8|
|α-Linolenic acid (% in oil)||9.6||9.9||10.0||9.8|
|Erucic acid (% in oil)||0.01||0.01||0.01||0.02|
|Total saturated fatty acids3 (% in oil)||6.6||6.8||6.9||6.9|
|Total mono-unsaturated fatty acids (MUFA)4 (% in oil)||61.7||61.4||62.6||63.9|
|Total poly-unsaturated fatty acids (PUFA)5 (% in oil)||31.4||31.5||30.3||28.7|
- Footnote 1
8.5% moisture basis.
- Footnote 2
N x 6.25, 8.5% moisture basis.
- Footnote 3
Total saturated fatty acids are the sum of palmitic (C16:0), stearic (C18:0), arachidic (C20:0), behenic (C22:0), and lignoceric (C24:0).
- Footnote 4
Total mono-unsaturated fatty acids are the sum of palmitoleic (C16:1), oleic (C18:1), eicosenoic (C20:1), erucic (C22:1), and nervonic (C24:1).
- Footnote 5
Total poly-unsaturated fatty acids are the sum of linoleic (C18:2),linolenic (C18:2) and eicosadienoic (C20:2). Results were calculated using western Canadian averages for each grade; provincial averages were weighted using Statistics Canada production estimate and of the grade distribution for each crop district.