Effect of rumen protected lysine, methionine and fat on nutrients utilization in growing jaffrabadi heifers Gajera A.P., Dutta K.S., Savsani H.H., Parsana D.K.*, Vataliya P.H., Sipai S.H., Ribadiya N.K. Animal Nutrition Department, College of Veterinary Sci. and Animal Husbandry, Junagadh Agricultural University, Junagadh, Gujarat, India *Corresponding author: Dr. D.K. Parsana, Teaching Assistant, Department of Animal Nutrition, C. V. Sc. and A. H., JAU, Junagadh. E-mail: parsana_dipen@yahoo.com
Online published on 24 April, 2014. Abstract An experiment was conducted to evaluate the incorporation of rumen protected lysine, methionine and fat on nutrient utilization, nutrient intake and digestibility coefficient of nutrients in Jaffrabadi buffalo heifers. Twenty buffalo heifers of Cattle Breeding Farm, Junagadh Agricultural University were randomized into four groups and each group consisting of five animals each, receiving one of the four dietary treatments for a period of 105 days: The heifers under control group (T1) were fed concentrate as per the feeding standards of NRC (1989) to meet out DCP requirement + 15 Kg seasonal green. In addition to the ration of T1, heifers were fed bypass fat @ 100 g/head/day (T2), bypass lysine and methionine @ 15 and 5g/head/day, respectively (T3) and bypass lysine and methionine as per T3 along with bypass fat as per T2 (T4). On an average the animals under T1, T2, T3 and T4 consumed 1137.96 ± 59.69, 1153.04 ± 73.06, 1154.60 ± 75.26 and 1185.9 ± 55.83 g CP/d, respectively; 691.84 ± 36.56, 755.83 ± 47.89, 873.44 ± 56.43 and 922.01 ± 43.41 g DCP/d, respectively, and 5.38 ± 0.24, 5.83 ± 0.28, 5.80 ± 0.34 and 6.36 ± 0.25 kg TDN/d, respectively, but the differences between the groups in respect of CP intake and TDN intake were non significant. The digestibility of DM, OM, CP, CF, EE and NFE were affected significantly (P<0.05) in general by supplementation of bypass methionine, lysine and fat. Body measurements and body weight (kg) of individual animal were recorded at the beginning and thereafter at every fifteen days interval throughout the experimental period. Biometric changes were uniform in all the experimental groups and the changes were positive. The efficiency of feed utilization was highest in T4 followed by that in T2, T3 and T1 but the treatment differences were statistically non significant (P>0.05). The results revealed that average daily feed cost was Rs. 72.94, 88.34, 92.94 and 109.40 per animal respectively, in T1, T2, T3 and T4. The cost of feeding was found to be higher in T4 than that in T1, T2 and T3, the treatment differences were found to be significant (P<0.05). Top Keywords Rumen protected Lysine, Methionine, Fat, Heifers. Top |