| An experiment was carried out to evaluate supplementation of sorghum straw (SS) with poultry litter (PL) in a single offering/day, and minerals and their effects on feed intake, sorghum straw dry matter disappearance (DMD) in nylon bags and rumen liquid ammonia N concentration. A 4x4 latin square design with 17-day periods and four rumen fistulated stalled cows was used to compare four treatments: (0) SS alone, (M) SS + mineral mixture offered ad libitum (P) SS + 1 kg/day of a concentrate with 83.5 % PL and (PM) SS + supplements used in M and P. The concentrate was offered in one meal and rumen N concentration increased to just over 100 mg/L between 1 and 3 h after feeding, decreasing to less than 50 mg/L after 7 h, levels similar to those on treatments... |
