Effects of Different Ingredient Ratios in Diets on Growth and Carcass Quality of Local H'mong Broiler at 5-14 Age Week

Abstract

A raising trial on one hundred twenty of local H’mong broilers at 5-14 age-week was carried out in order to evaluate effects of different ingredient ratios of diets on growth rate and carcass quality. The experiment was conducted including two periods (5-9 and 10-14 age week) and designed in a randomly completed design with five treatments and four each replicate of six broilers. Five diets of both two periods were formulated with the same metabolisable energy, crude protein, and lysine, in which the control diet only contained maize and soybean meal, and the others were supplied to replace a part of maize and soybean meal by rice bran (RB), broken rice (BR), and fish meal (FM). The birds were weighed each week; water and feed were given ad libitum; feed consumption was recorded each day throughout 2 periods; and birds were slaughed at 14 age-week. The results showed that birds receiving the diet containing (4.7% FM, 28.91% BR, and 4.22%RB for first phase; 3.14% Fm, 32.3% BR, and 4.24%RB for second phase) consumed the most feed and gained fastest (P<0.01), but feed/gain ratio was not different (P>0.05) in both two periods. The chemical composition of H’mong chicken meat; carcass, breast, and thigh yield were not significantly different (P>0.05), in contrast, there were significantly different (P<0.05) in pH15 and the water loss after storing and cooking.