RESPONSE OF BROILER CHICKENS FED DIETS CONTAINING VARIOUS FIBROUS FEEDSTUFFS TREATED WITH Zymomonas mobilis
NAME: ALADE, ADELAJA AUGUSTINE [View Profile]
YEAR OF ADMISSION: 2014/2015
MATRIC NO.: (PG 02/0054)
PROGRAMME: LIVESTOCK SCIENCE AND SUSTAINABLE ENVIRONMENT
DEGREE AWARDED: PhD.AgSE
DATE OF DEFENCE: 9TH JULY, 2018
The fibrous nature of agro-industrial by-products (AIBPs) limited their utilization in poultry production. Studies were conducted to evaluate the response of broiler chickens fed diets containing various fibrous feedstuffs treated with Zymomonas mobilis (ZT). Pure strains of Z. mobilis extracted from fresh palm wine was used to ferment soyabean hull (SBH), cassava sifting (CS), sawdust (SD) and corn cobs (CC). Four experiments were conducted and each study lasted for 56 days. Two hundred and forty (240) day old broiler chicks were randomly allotted to 5 treatments of 3 replicates with 16 birds each in a Completely Randomized Design for each study. Five diets containing untreated and treated SBH, CS, SD, and CC were formulated to replace wheat offal at 0, 50 and 100% at starter and finisher phases. Data on growth response, apparent nutrient digestibility, blood parameters, carcass yield and organ weight of broiler chickens were collected. Data were subjected to one-way Analysis of Variance, significant means were separated by Duncan’s Multiple Range Test at (p<0.05). The results showed that 100% ZTSBH increased (p<0.05) feed conversion ratio and 100% UTSBH increased (p<0.05) protein efficiency ratio at the starting phase while 50% UTSBH increased PER at the finishing phase. The 100% UTSBH and 100% ZTSBH significantly increased (p<0.05) crude protein, crude fibre digestibility at the finishing phase. Birds fed 50% UTSBH had highest (p<0.05) values for Packed cell volume, haemoglobin and red blood cell at the finishing phase. The 100% UTCS increased (p<0.05) the FCR at the starter phase. The 100% UTCS and 100% ZTCS had highest (p<0.05) values of CF digestibility at both phases. The starting birds on 100% ZTCS had highest (p<0.05) values for PCV and Hb but had highest (p<0.05) values of white blood cell at the finishing phase. The CS based diets increased (p<0.05) dressing percentage, breast, thigh, drumsticks of the birds. Broiler birds on 50% ZTCS had highest (p<0.05) gross profit and the rate of return on investment. The treated SD based diets promoted (p<0.05) PER and positively influenced (p<0.05) the CF and fibre fractions digestibility of the broiler chickens at the finishing stage. Broiler chicks fed SD based diets had increased (p<0.05) total protein, cholesterol and creatinine at the finishing stage. Broiler chickens on 100% ZTCC had lowest (p<0.05) values of FCR at both phases. The 50% ZTCC improved (p<0.05) CF and fibre fractions digestibility at the finishing phase. The finishing birds on 50% UTCC had highest (p<0.05) values of PCV, Hb and total protein. The UTCC and ZTCC improved (p<0.05) the breast, thigh and drumstick of the broiler chickens. The 100% ZTCC had highest values (p<0.05) for liver and kidneys. The 100% ZTCC increased (p<0.05) the gross profit, rate of return on investment and economic efficiency. The studies concluded that replacement of wheat offal with 50% UTCS and 50% UTSD, 100% UTCC and 100% ZTSBH, 100% ZTCS, 100% ZTSD and 100% ZTCC in the ration of broiler chicks promoted FCR, PER, PCV, Hb, RBC and carcass traits.