Influence of Canola Meal-Based Diets Supplemented with Exogenous Enzyme and Digestible Lysine on Performance, Digestibility, Carcass, and Immunity Responses of Broiler Chickens

Abstract

The response of broiler chickens to 2 levels of endo-1,4-beta xylanase and endo-1,3-beta glucanase combination (with and without), 3 levels of digestible Lys (0.8, 0.9, and 1.0%), and 2 levels of canola meal (CM; 20 and 30%) were evaluated in 2 x 3 x 2 factorial arrangement. A total of 2,448 male Hubbard broiler chicks were fed on practical mash diets having 2,750 kcal of ME.kg(-1) and 19.6% CP from 1 to 42 d of age. The BW gain was significantly reduced when 30% CM was added in the diets during 1 to 21 d. Feed:gain and mortality were also observed to be high. No significant effect of enzyme addition or Lys level was observed on feed intake, BW gain, feed:gain, and mortality during the starter phase. When the data were pooled for 42 d, BW gain and feed:gain were unaffected by enzyme addition or Lys levels. A depression in breast weight was observed due to 30% CM or 0.8 and 0.9% digestible Lys at 43 d. Leg weights were significantly depressed by enzyme addition or increasing digestible Lys to 1.0% of the diets. The AME, nitrogen digestibility, and antibody titers against Newcastle and infectious bursal diseases were also unaffected by the dietary treatments. In conclusion, the 30% CM is not recommended in broiler diets especially during starter phase (1 to 21 d). However, the CM may be used up to 30% of the diets during finishing phase. The digestible Lys can be lowered to 0.8% when amino acids in proportion to digestible Lys follow the ideal AA ratio. The glucanase and xylanase cocktail have no pronounced effect on the growth performance, nutrient digestibility, and carcass characteristics.

Growth and Economic Performance of Broiler Chickens Fed on Graded Levels of Canola Meal with or without Multi-Enzyme Supplementation

“…Inclusion of CM at a level of 5, 10 and 20% of the diet with or without enzyme supplementation did not affect carcass traits. These results agreed with previous reports (Sariçiçek et al, 2005;Mushtaq et al, 2007). On the contrary, Kocher et al (2001) found that different CM levels did not affect dressing percentages, but enzyme supplementation appeared to increase dressing percentage.…”

Response of broiler chickens to dietary inclusion of fermented canola meal under heat stress condition

“…In our study, diets containing 30, 20 and 10% FCM had 4.08, 2.72 and 1.36 lmol/g of glucosionolates, respectively. Generally, the level of glucosinolates in poultry diets should be less than 2.5 lmol/g to ensure optimum performance (Mushtaq et al 2007).…”

“…Tripathi and Mishra (2007) suggested that younger animals are more sensitive to glucosinolates than older ones. The higher sensitivity of chicks to antinutritional factors of FCM in early stages of life may contributed to their physiological status where they are still in development phase for some physiological functions such as digestion and digestive enzyme activity (Pearson et al 1983;Nitsan et al 1991;Mushtaq et al 2007).…”

Effects of Enzyme Complex Supplementation to a Paddy-based Diet on Performance and Nutrient Digestibility of Meat-type Ducks

“…On the other hand, in the current study, the enzyme complex increased the AME digestibility possibly due to: i) enough substrate for the enzyme; or ii) a complimentary effect between the three enzymes used. However, others studies have shown that a β-glucanase and xylanase cocktail in Canola meal-based diets have no pronounced effect on the growth performance or nutrient digestibility (Mushtaq et al, 2007). …”