Characterization of Nutritional Quality of Canola Greens

Abstract

Lack of adequate processing facilities has been a major hindrance in the adoption of canola (Brassica napus L. and Brassica rapa L.) as an alternative oilseed crop in the southern United States. Therefore, development of alternative uses could be instrumental in facilitating adoption of canola by American farmers. We evaluated chemical composition of greens from four canola cultivars (`Dixie', `Falcon', `HN120-91', and `Jetton') grown during 1995-96 and 1996-97 at Petersburg, Va., to determine their potential as a food and feed source. The results indicated potential yield of ≈11 t·ha-1 of fresh greens and ≈1 t·ha-1 of dry matter. The canola greens contained 3.4% oil and 30.6% protein on a dry weight basis. Canola greens contained 0.52%, 4.14%, 0.35%, 1.59%, and 0.20% (dry weight basis) of phosphorus, potassium, magnesium, calcium, and sodium, respectively. Canola greens also contained 0.94, 2.02, 5.47, 14.65, 28.61, 0.74, and 31.92 (mg/100 g dry weight basis) of sulfur, boron, zinc, manganese, iron, copper, and aluminum, respectively. The oil in canola greens contained 18.79%, 81.14%, 15.36%, and 65.78% saturated, unsaturated, monounsaturated, and polyunsaturated fatty acids, respectively. Based on these values, canola greens compared favorably with mustard and turnip greens.