Akademik Veri Yönetim Sistemi
KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, cilt.17, sa.5, ss.693-697, 2011 (SCI-Expanded)
In this study, the effect of grazing and concentrate supplementation on fattening performance, rumen pH, total volatile fatty acids and ammonia nitrogen concentration in lambs were investigated. The effect of vegetation period on nutrient content of the pasture were also determined. Eighteen Tushin lambs, 2-3 months age and weaned were used in experiment. Lambs were divided into three groups with their weight and each group consists of 6 lambs. Concentrate with 18.5% CP and 2.650 kcal/kg ME was fed to lambs in addition to pasture. Six lambs were only grazed (Pasture Group). Six lambs were supplemented 200 g concentrate with the pasture (Pasture + Suppl. I Group) and six lambs were supplemented 400 g concentrate with the pasture (Pasture + Suppl. II Group). Lambs were grazing on the pasture 8 h in a day. Supplementated feeds were given after the grazing and water was supplied two times in a day. The lamb body weight gains were determined monthly. The experiment was lasted three months There were no significant effect of grazing and supplementation on body weight of lambs (P > 0.05). Daily weight gain of grazing and supplementation groups were determined 153, 161, 183 g respectively. There were no significant differences in rumen fluid pH, TVFA and NH(3)-N between the grazing or supplementation groups (P > 0.05). Dry matter and CF contents of pasture were increased with respect to the vegetation period (31.33-74.89%, 29.08-34.68%), but CP was decreased from 11.01% to 6.25% (P < 0.05). As a result, supplementation of concentrate feed to grazing lambs on the pasture were no effect on performance and rumen parameters in lambs. On the other hand there were differences nutrient contents of pasture with vegetation.