Effect of using enzyme on egg quality traits of layer
D. NANDI, R.P.S. BAGHEL, S.K. SINGH,
R.K. TIWARI AND S. NAYAK
Department of Animal Nutrition
College of Veterinary Science and Animal Husbandry
JNKVV, Jabalpur (M.P.) - 482 001
An experiment including 180, layers of 21 weeks age was conducted to see the effect of using enzyme in layers containing various combinations of coarse cereals and oilseed meals. These birds were allotted randomly to six dietary treatments. Control diet-I (T 1) was formulated using maize, deoiled rice polish, soybean meal, fishmeal, minerals and vitamin supplements. While, control diet II (T 2) was formulated without fishmeal. Further, in diets T 1and T 2, maize was exclusively used as cereal and soybean meal as vegetable protein supplement. While, in diet T 3, 85% of maize and 70% of soybean meal was replaced by using equal proportions of sorghum and ragi and niger and sesame cakes, respectively. In diet T 4 56.4% maize was replaced by using sorghum and ragi in approximately 1:3 ratio and soybean meal was completely replaced by incorporating niger and sesame cake in equal proportion. While, in diet T 5, maize as well as soybean meal was completely replaced by using sorghum, ragi, Niger, and sesame cake in equal ratio. In diet T 6, 85% of maize and 70% of soybean meal was replaced by using equal combination of sorghum and ragi and niger and sesame cake, respectively. Diet T 3 and T 6 were same except in T 6 lysine was not supplemented. In diets T 4, T 5, and T 6 enzyme Beetazymes ( b-D glycosidase, cellulases, proteases, amylases, phytase) was added @ 50g/Q.
Use of enzyme with or without lysine in the diet had significant influence on the egg quality traits of birds. Shape index was significantly (P<0.05) higher in birds allotted T 1 diet, it was lowest in those assigned T 5 diet. Birds assigned T 4 and T 5 diet had statistically similar shape index. Albumen index was significantly higher in birds raised on T 1, T 2, T 3 and T 6 diets. It reduced significantly in birds assigned T 4 and T 5 diets. These diets had no significant (P>0.05) effect on Yolk index. Haugh unit was maximum in birds assigned T 1 diet was statistically similar to those receiving T 2 diets. While, lowest Haugh unit was recorded in birds allotted T 5 diet. Maximum shell thickness was noted in birds allotted T 6 diet while, it was minimum in those offered T 2 diet.