Abstract
This study compared the nutritional value of canola (B. napa) and mustard (B. hirta) press cakes obtained from the biodiesel industry as ingredients for use in diets fed to broiler chickens. A total of 210, one-day old, male broiler chicks were randomly assigned to one of seven dietary treatments. The control diet was based on wheat and soybean meal and contained 15% canola meal. For the experimental diets, 5, 10 or 15% of the canola meal was replaced with an equal amount of either canola or mustard biodiesel press cake. Dry matter and neutral detergent fiber digestibility were significantly higher for birds fed diets containing either canola or mustard biodiesel press cake compared with canola meal. Dry matter and neutral detergent fiber digestibility of the canola biodiesel press cakes was higher than the mustard biodiesel press cakes. Ether extract digestibility and nitrogen retention were significantly higher for birds fed canola biodiesel press cake compared with canola meal and mustard biodiesel press cake. Body weight gain and feed intake did not differ between birds fed canola or mustard biodiesel press cake and canola meal. In addition, there was no significant difference in body weight gain or feed intake between birds fed diets containing canola or mustard biodiesel press cake. Feed conversion was significantly improved for birds fed either canola or mustard biodiesel press cake compared with canola meal. Mortality was unaffected by treatment. Since the performance of broilers fed canola biodiesel press cakes was essentially the same as that of broilers fed canola meal, it is difficult to justify a premium to be paid for canola biodiesel press cake over that paid for canola meal. In addition, there was no difference in the performance of broilers fed biodiesel press cake obtained from canola or mustard seed. As mustard seeds are generally available at a lower price than canola seed, there may be some incentive to use mustard rather than canola seed for producing biodiesel press cake for use in poultry production.
Highlights
Interest in biodiesel production is expanding rapidly (Hancock, 2005)
This results in the production of press cakes which Olds College School of Innovation (Olds, Alberta) as part have a much higher residual oil content than the meals of their program to determine the technical and economic produced from processes which employ both processes in feasibility of on-farm biodiesel production
The results of the chemical and amino acid analyses conducted on the major feed ingredients (Table 1) are within the range of those previously reported for wheat, canola meal and soybean meal in standard industry sources such as the National Research Council (1994), Feedstuffs (Dale and Batal, 2007) as well as the Raw Material Compendium (Novus, 1994)
Summary
Interest in biodiesel production is expanding rapidly (Hancock, 2005). For 2007, worldwide production of biodiesel was projected to reach 8.4 million tonnes and could be as high as 20 million tonnes by 2010 (Licht, 2007). Advantages of biodiesel compared to petroleum diesel include its renewable nature, higher cetane rating, higher fuel lubricity and lower production of greenhouse gases (Hancock, 2005). Biodiesel can be produced from vegetable oils, animal fats and recycled restaurant grease (Natural Resources Canada, 2008). Canola seed is one of the most widely utilized feedstocks for biodiesel production (Koh, 2007). Some advantages of canola as a feedstock for biodiesel production include its high oil content which results in more
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