Augmented Feeding with By-passed Amino Acid and Slow-released Non-protein Nitrogen Supplement on Milk Peak, Lactation Persistency, and Post-partum Reproduction of Brazilian Buffaloes

Daniel L Aquino, M V Del Rosario, K F Vergara, L C Cruz

Abstract

Twenty five pregnant and primiparous Brazilian buffaloes were allotted in a Randomized Completed Block Design involving five dietary treatments namely; without (T1) or with (T2) augmented feeding plus supplementary by-passed amino acid (BPAA, T3); slow-released non-protein nitrogen (SRNPN, T4) and its combination (T5) to assess their milk peak, lactation persistency and post-partum reproductive performance. Five cows were assigned per treatment and each cow served as a replicate. The feed ration was composed of corn silage (67.3%), rice straw (9.5%) and dairy concentrate pellets (23.2%). The supplementary concentrates, BPAA and SRNPN were given at 0.5kg/kg milk production, 100 grams and 50 grams/hd/day, respectively. Results showed that augmented feeding alone or with supplementary BPAA and SRNPN gave significantly higher (P<0.05) peak milk of 12 and 12.5 kg/d, respectively. The milk peak was observed during 68 (T1) and 71 days (T5) in milk of the cows. The dry matter and crude protein digestibility were significantly increased in T2 and T5. No significant differences were observed on lactation persistency but the observed value of 91.8% was closer to the reported ideal lactation persistency of 95% in dairy buffaloes. No significant differences were observed on the post-partum reproductive performance, feed intake, and the feed cost to produce a kilogram of milk. At 146 days service period using artificial insemination, 80% of the buffaloes were already confirmed pregnant. The use of augmented feeding with BPAA and SRNPN supplements gave a significant (P<0.05) net income of P33,762.00 (US$ 720/cow) per lactation of the buffaloes.

 Keywords

Augmented Feeding; By-passed Amino Acid; Slow-released Non-protein Nitrogen; Milk Peak; Brazilian Buffaloes

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DOI: http://dx.doi.org/10.14334/Proc.Intsem.LPVT-2016-p.104-114

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