Ojo Victoria Olubunmi A, Aina Ayobami B J, Fasae Oladapo A, Oni Adebayo O, Aderinboye Ronke Y, Dele Peter A, Idowu Oluwaseun J, Adelusi Oludotun O, Shittu Olalekan O, Okeniyi Funmilayo A, Jolaosho Alaba O
Trop Anim Health Prod. 2014 Jan;46(1):197-202. doi: 10.1007/s11250-013-0476-2.
Twelve white Fulani × N'dama cross-bred calves weighing 83.79 ± 1.16 kg were used in an 84-day experiment to investigate the utilization of forage resources from natural grazing land. The experimental diets were sole grazing, grazing + hay, grazing + silage and grazing + Leucaena leucocephala leaves. The calves were divided into four groups of three animals each and were randomly assigned to the four experimental diets. Crude protein (CP) contents of the forages ranged from 59 to 171 g/kg dry matter (DM). Neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents of the forages ranged from 560 to 705 g/kg DM and 363 to 440 g/kg DM, respectively. Significantly (P < 0.05) higher values in mineral contents (Ca, K, P and Mg) were recorded for L. leucocephala leaves compared to other forage resources. Variations (P < 0.05) were observed in the average daily gain. Animals on grazing + L. leucocephala leaves diet had the highest (113 g/day) average daily gain, while those on sole grazing showed the least value (26.2 g/day). Packed cell volume (PCV), total serum protein, urea and calcium concentration showed significant differences (P < 0.05). Effective utilization of forage resources from the natural pasture by the calves was attained on supplementation with conserved forages and L. leucocephala leaves without any deleterious effects on the haematological and serum parameters.
选用12头体重为83.79±1.16千克的白色富拉尼×恩达马杂交犊牛，进行为期84天的试验，以研究天然放牧地饲料资源的利用情况。试验日粮为单纯放牧、放牧+干草、放牧+青贮饲料和放牧+银合欢叶。将犊牛分为四组，每组三头，并随机分配到四种试验日粮中。饲料的粗蛋白（CP）含量为59至171克/千克干物质（DM）。饲料的中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）含量分别为560至705克/千克DM和363至440克/千克DM。与其他饲料资源相比，银合欢叶的矿物质含量（钙、钾、磷和镁）显著（P<0.05）更高。平均日增重存在差异（P<0.05）。采食放牧+银合欢叶日粮的动物平均日增重最高（113克/天），而单纯放牧的动物平均日增重最低（26.2克/天）。红细胞压积（PCV）、总血清蛋白、尿素和钙浓度存在显著差异（P<0.05）。在补充保存饲料和银合欢叶后，犊牛能够有效利用天然牧场的饲料资源，且对血液学和血清参数没有任何有害影响。
