Comparison of canola and mustard presscake from biodiesel production as protein sources for growing cattle

Abstract

McKinnon, J. J. and Walker, A. M. 2009. Comparison of canola and mustard presscake from biodiesel production as protein sources for growing cattle. Can. J. Anim. Sci. 89: 401Á408. Two studies were conducted to examine in situ rumen degradation kinetics of biodiesel presscake from canola (CPC) (Brassica napa) and mustard (MPC) (Brassica hirta) relative to regular canola meal (CM) and to compare the performance of cattle fed these meals as protein supplements in backgrounding diets. In the in situ trial CPC and MPC had similar (P 0.05) rates of DM, CP, fibre and crude fat disappearance relative to canola meal. However, CPC and MPC exhibited greater (PB0.05) soluble DM and CP fractions, while CPC had greater (PB0.05) soluble ADF and NDF fractions than canola meal. The effective degradability of CP, ADF and NDF fractions was greater (PB0.05) than that of canola meal. No differences (P 0.05) in effective degradability of crude fat were observed. The feedlot trial involved 391 steers (323924 kg) that were fed one of three experimental diets: a control diet consisting of barley silage (213 g kg ), or a diet containing either CPC or MPC in place of CM as the protein supplement. Backgrounding performance was unaffected by treatment as no differences in DMI (P 00.127), ADG (P00.679) or feed:gain (P00.792) were observed. Composition of gain estimated by ultrasound measurement of longissimus dorsi area and subcutaneous fat depth was unaffected by dietary treatment. It is concluded that biodiesel presscake from both canola and mustard seed provides a superior source of rumen degradable nutrients relative to CM and can be used as a protein supplement for growing cattle without any adverse affects on performance at levels up to 10% of the diet DM.

Comparison of Soybean, Canola, and Mustard Meals as Organic Sources of Nitrogen for Potatoes in Northern New England

“…However, to our knowledge nothing has been published in terms of field studies with oilseed meals as sources of N for potatoes. The crude protein concentration of mechanically extracted soybean, canola, and mustard meals are reported to be 48%, 39%, and 36%, respectively, on a dry matter basis (7,10). The crude fiber content is less than 13% for canola and less than 7% for soybean (7); therefore, these materials appear to have potential as N sources.…”

“…The crude fiber content is less than 13% for canola and less than 7% for soybean (7); therefore, these materials appear to have potential as N sources. There is increasing interest in use of mechanically extracted seed meals as sources of N, partly because of the nascent development of small‐scale processing of oilseeds [e.g., (10,17)], and partly because seed meals store well, are relatively uniform in composition with low C:N ratios, and have better handling characteristics than some other forms of organic N (e.g. fish processing waste) making their use attractive to some growers.…”

Rumen fermentation and microbial yield of high- or low-protein diets containing ground soybean seeds or homemade rapeseed expellers evaluated with RUSITEC

“…Recent constraints introduced by the Nitrate Directive (European Commission 1991) and the increasing market price of soybean products are forcing farmers to consider the use of low-protein diets (Dal Maso et al 2009;Schiavon et al 2010Schiavon et al , 2012 and alternative protein sources (McKinnon and Walker 2009). Recent work conducted on double-muscled Piemontese bulls evidenced as a reduction in dietary crude protein (CP) concentration in dry matter (DM) from 147 to 108 g kg (1 did not influence DM intake, total volatile fatty acids concentration in the rumen fluid, nutrient digestibility, average daily gain or nitrogen retention (Schiavon et al 2010(Schiavon et al , 2012.…”

“…In recent years, an increasing number of farms have also introduced small-sized equipment for mechanical extraction of oil from rapeseed, to produce homemade expellers. In this case seeds are usually pressed at moderate temperatures (B1008C) using the procedure of ''cold-pressing'', as it uses only the heat generated from seed crushing (McKinnon and Walker 2009). After extraction, the oil is used as fuel for tractors, whereas residual expellers are recycled as protein and fat supplements for animal feeding, to the economic and environmental benefit of local farmers (Baquero et al 2010;Esteban et al 2011).…”

“…After extraction, the oil is used as fuel for tractors, whereas residual expellers are recycled as protein and fat supplements for animal feeding, to the economic and environmental benefit of local farmers (Baquero et al 2010;Esteban et al 2011). The nutritional characteristics of homemade rapeseed expellers are poorly characterized particularly with regard to their influences on rumen fermentation and microbial growth (McKinnon and Walker 2009;Kaldma¨e et al 2010).…”