Yazar "Unal, Yucel" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    The Effects of Grazing and Concentrate Supplementation at Pasture on Performance and Rumen Parameters in Lambs
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2011) Kaya, Ismail; Sahin, Tarkan; Elmali, Dilek Aksu; Unal, Yucel
    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.
  • Küçük Resim
    Öğe
    Estimation of Feed Intake and Digestibility in Grazing Cattle Using Alkane Indicator Technique
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2014) Unal, Yucel; Kaya, Ismail; Sahin, Tarkan; Oncuer, Ahmet; Elmali, Dilek A.; Yenice, Guler
    This study examined the estimation of the Dry-Matter Intake (DMIe) and Digestibility (DMDe) and the utilization of the pasture by grazing cattle in different seasons of the Kars region by using alkane indicator technique. Two experiments were carried out, and in the first experiment, 5 male cattle (mean LW. 244.5 +/- 2.3 kg) were used for 20 days. In first experiment, the precision and reliability of alkane indicator technique were determined by comparing the real Dry Matter Intake (DMI) and Dry Matter Digestibility (DMD) which was obtained by the controlled indoor study with DMIe and DMDe estimated by using alkane indicators. The second experiment was conducted with the pasturing cattle in meadow in 5 terms each lasted 20 days. Ten male cattle (mean LW. 164.9 +/- 1.5 kg) were divided in two groups, and different animals were used in each term. The best result for DMIe was obtained by using the alkanes C-33:C-32 couples in mixed (collected in 24 h) samples in indoor study (R-2:0.86). DMDe's calculated by using alkanes C-32 and C-33 were similar to the real DMD, whereas the DMDe's with alkane C-36 were underestimated (P<0.05). The results obtained with indoor study showed that alkane indicator capsules could be used successfully as a dosing method in alkane indicator method. According to the second experiment results, it was determined that the animals, grazing in the pasture in Kars conditions, were not able to get required nutrient from the pasture towards the end of August.