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Authors: Rahman, Saidur
Keywords: Carcass characteristics, hemato-biochemical parameters, lemon juice, molasses, productive performance
Issue Date: Jun-2018
Publisher: A thesis submitted in partial of the requirements for the fulfillment of the degree of Master of Science in Animal and Poultry Nutrition Department of Animal Science and Nutrition Faculty of Veterinary Medicine Chittagong Veterinary and Animal Sciences University Khulshi, Chittagong-4225, Bangladesh
Abstract: Two hundred forty Cobb 500™ unsexed broiler chicks were used in a 28-day trial in a poultry farm at Guimara, Khagrachari Hill district to study the effects of supplementing lemon juice and molasses on productive performance, carcass characteristics and hemato-biochemical parameters of commercial broiler. Lemon juice and molasses were added with drinking water and fed in addition to regular pellet diet. The experiment was carried out in a 2×4 factorial arrangement with 2 levels of lemon juice (0 and 1 ml/L of drinking water) and 4 levels of molasses (0, 0.5, 1 and 1.5% of drinking water from 1-2 wks and 0, 2.0, 2.5 and 3.0% of drinking water from 3-4 wks). Birds were randomly distributed into 24 floor pens where 10 birds were allocated per pen. All birds had free access to ad-libitum feeds and water. Results indicated that, live weight significantly (p<0.01) increased in 3rd and 4th weeks, weight gain increased (p<0.01) in 1st and 3rd weeks, feed intake improved (p<0.001) in 1st and 3rd weeks and FCR improved (p<0.05) only in the 1st week as the main effects of supplementing lemon juice in the drinking water of the commercial broiler birds. On average, during 0-3 weeks, lemon juice exerted positive effects (p<0.01) on feed intake and weight gain. However, only feed intake improved (p<0.01) during 0-4 weeks. Similar to lemon juice, molasses improved (p<0.01) live weight in 2nd, 3rd and 4th weeks, weight gain increased (p<0.001) in 1st and 3rd weeks and feed intake improved (p<0.05) in 1st, 2nd and 3rd weeks and FCR improved (p<0.05) in 2nd, 3rd and 4th weeks as the main effect. Overall, feed intake (p<0.001), weight gain (p<0.001) and FCR (p<0.05) were improved during 0-3 weeks and only feed intake improved (p<0.001) during 0-4 weeks. Unlike main effects, combined effects of lemon juice and molasses were significant only for weight gain in 3rd week (p<0.05) and FCR in 1st and 4th weeks (p<0.01). Main effect of supplementing lemon juice was positive for wing (p<0.05), drumstick (p<0.001), neck (p<0.001), skin (p<0.05), intestine (p<0.001), breast muscle (p<0.001), liver (p<0.05), head (p<0.001), abdominal fat (p<0.001) and feather weight (p<0.001). Similarly, main effect of supplementing molasses was positive for drumstick (p<0.001), neck (p<0.001), intestine (p<0.05), breast muscle (p<0.001), shank (p<0.05), liver (p<0.05), head (p<0.05) and abdominal fat weight (p<0.01). Combined effects were positive for dressing percent (p<0.05), wing weight (p<0.05), drumstick weight (p<0.05), breast muscle weight (p<0.001), thigh muscle weight (p<0.05), gizzard weight (p<0.05) and abdominal fat weight (p<0.05). Main effect of supplementing both lemon juice and molasses were significant (p<0.01) for glucose, albumin, total protein, LDL, HDL and cholesterol. However, combined effects were significant (p<0.01) only for glucose, albumin, LDL and HDL. There was a positive relationship between cholesterol and glucose (r=0.70; p<0.01) and a negative relationship between total protein and glucose (r=-0.80; p<0.001). Inclusion of 1 ml/litre lemon juice and 3% molasses in drinking water in addition to regular pellet diet is recommended for better growth, optimum FCR and desirable carcass characteristics in commercial broiler.
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