Efekat enzima proteaze na prinos i udeo jestivih pratećih proizvoda klanja pilića hibrida master gris | Effect of protease on weights and percentage yields of edible slaughter by-products of master gris broiler chickens
2021
Dosković, Vladimir | Bogosavljević-Bošković, Snežana | Škrbić, Zdenka | Lukić, Miloš | Rakonjac, Simeon | Petričević, Veselin | Beuković, Dejan
The effect of supplemental protease (Ronozyme ProAct) in broiler diet on theweights and percentage yields of slaughter by-products of male and female medium-growing Master Gris broiler chickens was analysed. Fattening period lasted for 63days. Broilers were assigned to 3 experimental groups, each consisting of 100 birds.Experimental groups differed in protease levels used in their diets: control broilers(C) received complete feeds (starter, grower and finisher) without supplementalprotease; chickens in the experimental group E-I were given a diet containing 0.2%protease and crude protein levels reduced by 4% compared with the control group,whereas experimental E-II broilers were fed a diet supplemented with 0.3%protease and containing crude protein levels reduced by 6% compared with C birds.The analysis of the results showed that feeding treatments had a very small effect onthe weights and proportion yields of edible by-products (with difference only in thepercentage yield of liver relative to live weight between C and E-I broilers, P<0.05),whereas sex was found to affect almost all slaughter by-products (except abdominalfat weight and the percentage yield of gizzard relative to live weight, P>0.05).
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