Effects of augmented feeding with by-passed amino acid and slow-released non- protein nitrogen supplements on milk peak, lactation persistency and post-partum reproductive performance of Brazilian buffaloes
Aquino D.L.,Philippine Carabao Center l |
Del Rosario M.V.,Philippine Carabao Center l |
Vergara K.F.,Philippine Carabao Center l |
Cruz L.C.,Philippine Carabao Center l
Buffalo Bulletin | Year: 2013
Twenty five (25) pregnant and primiparous imported Brazilian buffaloes were allotted to five dietary treatments namely; without (T1) or with (T2) augmented feeding plus supplementary by-passed amino acid (T3); slow-released NPN (T4) and its combination (T5) to assess their milk peak, lactation persistency and post-partum reproduction under intensive system of management. The cows were assigned in a randomized complete block design with five cows per treatment and each cow serves as individual replicate. The dairy buffalo ration composed of corn silage (67.3%) and rice straw (9.5%) and dairy concentrate pellets (23.2%). The supplementary concentrates, by-passed amino acid and slow-released NPN were given at the rate of 0.5 kg/kg milk production, 100 grams and 50 grams/hd/day, respectively; for six months of lactation. The feed intake, nutrients utilization and digestibility were also evaluated. Results indicated that augmented feeding alone or its combinations with supplementary by-passed amino acid and slow released NPN gave significantly higher (P<0.05) peak milk of 12 kg/d and 12.5 kg/d, respectively; than the cows without augmented feeding, augmented feeding plus bypassed amino acid and slow released NPN. The milk peak was recorded at 68 (T1) and 71 days (T5) lactation periods of the cows. There were no significant differences of the dietary treatments on the average lactation persistency of the cows but the data gathered (91.8%) was closer to the reported ideal lactation persistency of 95%. No significant differences were also observed on the post-partum reproductive performance, feed intake, digestion coefficients and the feed cost to produce a kilogram milk of the cows however, at 146 days service period using artificial insemination, 80% of the buffaloes were already confirmed pregnant.