Detmann, Edenio
- Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
- Universidade Federal de Viçosa
Sammanfattning
The aim of this study was to evaluate the effect of adding virginiamycin to either mineral mixture or multiple supplement on intake, digestion, ruminal fermentation profile, rumen microbial production, blood metabolites, and liver metabolism of zebu heifers fed a high-quality tropical forage. Eight Brahman heifers were assigned to a replicated 4 x 4 Latin Square design. The treatments were: mineral mixture, mineral mixture with virginiamycin, multiple supplement, and multiple supplement with virginiamycin. The basal diet consisted of a high-quality Tifton 85 hay (Cynodom sp.) chopped at 10-cm particle size and fed twice daily. The mineral mixture was provided daily at 120 g/animal. The multiple supplement was formulated to provide 300 g of crude protein (CP)/kg as fed, contained mineral mixture, corn grain, and urea: ammonium sulfate, and was daily provided at 200 g/animal. The mineral mixture and multiple supplement provided the same daily amount of minerals. The amount of supplemental virginiamycin was based on a maximum theoretical response on animal performance (50 mg/100 kg body weight) and daily mixed to the supplements types. The treatments were compared according to a 2 x 2 factorial arrangement (mineral mixture and multiple supplement, with or without virginiamycin). The virginiamycin supplementation did not alter either voluntary intake or digestibility (P >= 0.44). Using the multiple supplement decreased forage (P
Nyckelord
additives; Brahman; nitrogen balance; supplementation; voluntary intake
Publicerad i
Frontiers in animal science
2022, volym: 3, artikelnummer: 1000490
SLU författare
UKÄ forskningsämne
Husdjursvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.3389/fanim.2022.1000490
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/119326