Mustafa Abdelfatah Abdelsalam, Tyagi Nitin, Gautam Mayank, Chaudhari Alkesh, Sediqi Jawid
Animal Nutrition Division, ICAR- National Dairy Research Institute (Deemed University), Karnal, Haryana, -132001, India.
Trop Anim Health Prod. 2017 Dec;49(8):1637-1644. doi: 10.1007/s11250-017-1371-z. Epub 2017 Aug 7.
Fifteen close up pregnant Murrah buffaloes of mean body weight (668.3 ± 24.03) kg, lactation number (2.8 ± 0.17) and expected producing ability (EPA) (2125.7 ± 46.34) were randomly distributed into three groups each of five animals to investigate the performance at different levels of metabolizable energy and protein. Control group was fed as per ICAR Nutrient requirements of animals (2013) recommendation whereas treatment group (1) high metabolizable energy and high metabolizable protein (HMEMP) and group (2) low metabolizable energy and low metabolizable protein (LMEMP) were offered with ration containing 15% more and 15% less ME and MP, respectively. The feeding trial was carried out for the period of 40 days before parturition and continued for 120 days after parturition. Intake of dry matter (DM) (%BW) was similar among experimental groups. Metabolizable energy (ME) (MJ/100 kg BW) and metabolizable protein (MP) (g/100 kg BW) intake was highest in HMEMP followed by control and LMEMP group, respectively. Digestibility trial of 7 days was conducted at 60 days post-partum and it was observed that apparent digestibility coefficients (%) of DM, organic matter (OM), crude protein (CP), ether extracts (EE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were similar among the experimental groups. Milk yield (kg/kg DMI) was similar among treatment groups whereas 6% fat corrected milk (FCM) was lower in LMEMP group as compared to HMEMP and control. No significant effect of dietary MP and ME levels on milk composition was observed among experimental groups. There were no significant difference in non esterified fatty acid (NEFA), blood urea nitrogen(BUN), growth hormone (GH) and insulin like growth factor-1(IGF-1) concentration among different experimental groups whereas concentration of immunoglobulin G (IgG) (μg/ml) was found to be lower in LMEMP. The study results indicate that nutrient digestibility and lactation performance was not affected with 15% variation in intakes of ME and MP in lactating Murrah buffaloes.
15头平均体重（668.3±24.03）千克、泌乳次数（2.8±0.17）且预期生产能力（EPA）为（2125.7±46.34）的近产穆拉水牛被随机分为三组，每组5头，以研究不同代谢能和蛋白质水平下的生产性能。对照组按照印度农业研究理事会（ICAR）动物营养需求（2013年）建议进行饲喂，而处理组（1）高代谢能和高代谢蛋白质（HMEMP）以及组（2）低代谢能和低代谢蛋白质（LMEMP）分别饲喂代谢能和代谢蛋白质含量高出和低出15%的日粮。在分娩前进行为期40天的饲养试验，并在分娩后持续120天。各实验组之间干物质（DM）摄入量（%体重）相似。代谢能（ME）（兆焦/100千克体重）和代谢蛋白质（MP）（克/100千克体重）摄入量在HMEMP组最高，其次分别是对照组和LMEMP组。在产后60天进行了为期7天的消化率试验，观察到各实验组之间干物质、有机物（OM）、粗蛋白（CP）、乙醚提取物（EE）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的表观消化率系数（%）相似。各处理组之间的产奶量（千克/千克DMI）相似，但与HMEMP组和对照组相比，LMEMP组的6%乳脂校正乳（FCM）较低。在各实验组中未观察到日粮MP和ME水平对乳成分有显著影响。不同实验组之间非酯化脂肪酸（NEFA）、血尿素氮（BUN）、生长激素（GH）和胰岛素样生长因子-1（IGF-1）浓度无显著差异，而LMEMP组的免疫球蛋白G（IgG）浓度（微克/毫升）较低。研究结果表明，泌乳穆拉水牛的代谢能和代谢蛋白质摄入量有15%的变化时，营养物质消化率和泌乳性能不受影响。
