Effect of Canola (Low Glucosinolate Rapeseed) Meal, Protein and Nutrient Density on Performance, Carcass Grade, and Meat Yield, and of Canola Meal on Sensory Quality of Broilers

Abstract

Candle canola (low erucic acid, low glucosinolate rapeseed) meal (CM) was incorporated into wheat-based broiler diets at up to 281 g CM/kg in starter diets with either 230 or 210 g protein/kg and up to 121 g CM/kg in finisher diets with either 190 or 170 g protein/kg. Each combination of CM and protein levels was fed in diets of low and high nutrient density to assess the value of added fat in maintaining constant the true metabolizable energy content of diets containing CM.Liveweight gains were not affected by either CM or nutrient density. Feed efficiency was not affected by CM when nutrient density was maintained with fat but decreased in diets of lower nutrient density. Low protein diets reduced liveweights, feed efficiency, carcass fleshing grades and edible meat yield, and increased abdominal fat. Carcass fleshing grades increased from 7 to 8 weeks of age with no corresponding increase in edible meat yield.Intensity of chicken flavor decreased and frequency of off-flavors increased when the diets contained 281 g CM/kg in the starter with 121 g CM/kg in the finisher. No adverse sensory effects occurred when the diets contained CM at up to 210 g/kg in the starter with 90 g/kg in the finisher. (

Effect of Starter and Finisher Protein on Performance, Carcass Grade, and Meat Yield of Broilers

“…Total mortality was highest among the birds fed starter diet S3, and the effect was due in Salmon et al (1981). True metabolizable energy (Sibbald, 1976) using values determined by assay: wheat, 3.30 Meal (13.8 MJ)/g; soybe part to a linear increase (P<.05) in incidence of leg problems as the starter protein level increased.…”

“…When dietary protein was varied only during the first 2 weeks, however, at 5 weeks of age neither carcass yield nor fleshing nor finish grade was affected (Moran, 1980). Salmon et al (1981) found that in addition to increasing abdominal fat deposition, broiler diets of lower protein concentration reduced carcass fleshing grades and edible meat yield. Similarly with turkeys, diets that led to suboptimal protein intake reduced carcass and edible meat yields and increased the proportions of skin and bone (Salmon et al, 1982).…”

Canola Meal and Fish Meal in Turkey Starter Diets

“…When determined on feedstuffs currently in use, TME values appear to predict feed efficiency (Salmon et al, 1981). However, variation among batches of feedstuffs may have introduced errors in the present instance, where TME values determined on previous lots of ingredients were employed for calculation of dietary energy values.…”

Effect of Canola Meal on the Sensory Quality of Turkey Meat

“…Hawrysh et al (1980a,b) found that diets containing 200 g CM/kg did not affect the eating quality of broiler meat. Salmon et al (1981) found no effect on flavor when broiler chicken diets contained 210 g CM/kg in the starter and 90 g CM/kg in the finisher. However, adverse effects were detected when the starter diets contained 281 g CM/kg and the finisher diets, 121 g CM/kg.…”