Effect of Using Guava By-Products with or without Enzyme Supplementations on Growing Rabbit's Performance

Abstract

THIS study aimed to evaluate the effect of using guava by-products without or with multienzyme supplementations as an alternative feed source on the growth performance, nutrient digestibility, carcass characteristics and some blood parameters. Ninety-weaned male rabbits were divided into six treatments. Two different levels of guava (%5 and %10) in addition to control diet (0%) supplemented with or without commercial enzyme at level of 1 g/kg diet were used in (3*2) factorial design. Results showed significantly increases in the body weight gain, total feed intake, performance index and better feed conversion ratio for enzyme supplemented group. Rabbits fed higher level of guava (10%) recorded the worst values than those of other experimental levels (0% and 5%). all groups fed on either lower or higher level of guava byproduct with enzyme supplementation were better than control group in all performance parameters. Nutritive values and digestibility of all nutrients improved significantly in rabbits fed diets either has low level of guava or enzymes supplementation. Growing rabbits fed guava byproducts supplemented with or without enzyme had no deleterious impact on liver and kidney functions. Urea, protein metabolites and lipid profile decreased significantly for all experimental treatments than control groups. Rabbits fed guava either with or without enzyme recorded higher value of glucose. Blood antioxidants parameters of all experimental treatments were higher, than control groups. Rabbits fed on all levels of guava by-product with enzyme or at level of 5% without enzyme recorded the highest values of economical and relative efficiency.