Effect of Partial Replacement of Corn by Biscuit Waste (Bw) on Nutrients Digestibility, Milk Production and Economical Evaluation in Lactating Damascus Goats

Abstract

wenty-four Damascus goats at late pregnancy period with live body weight on the average (44 ± 2 Kg). Were divided into three similar groups according to their body weight (8 goats each) for 90 days trial. The experimental concentrate feed mixture (CFM) offered to animals without or with the rate of replacement 20 (R2) and 40% (R3) Biscuits waste (BW ) of corn. The basal rations composed of 60% concentrate feed mixture (CFM) and 40% clover hay. Digestibility trials were carried out at the end of experiment using acid insoluble ash (AIA) technique. Data showed that significant higher digestibility (P <0.05) of DM, CP, EE and NFE for BW supplementation compared with control, while decrease digestibility (P <0.05) of CF. Milk yield was higher significantly in R2 ( 20% replacement) than the control, there was no significant difference on fat% while decrease in protein % in the same treatment . Values of concentrations of blood plasma total protein and Albumin , cholesterol, triglycerides and total lipids of experimental goats were higher with feeding on 20 and 40% corn replacement than the control. Generally, it could be concluded that the replacement of corn by BW at level 20% in rations for dimishki goats improved digestibility, feeding values and milk yield and its composition.