Effects of slow-release urea and molasses on ruminal metabolism of lambs fed with low-quality tropical forage

The effects of two sources of slow-release urea (SRU) with a source of soluble carbohydrates on ruminal fermentation in lambs fed with a low-quality forage hay were evaluated. Optigen is a commercial source of slow-release urea, whereas Surelease is an ethyl cellulose-coated urea prepared in the Lab...

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Bibliographic Details
Published in:Small ruminant research 2014-01, Vol.116 (1), p.28-31
Main Authors: Lizarazo, A.C., Mendoza, G.D., Kú, J., Melgoza, L.M., Crosby, M.
Format: Article
Language:English
Subjects:
Molasses
Protein
Ruminal fermentation
Slow-release urea
Urea
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Summary:The effects of two sources of slow-release urea (SRU) with a source of soluble carbohydrates on ruminal fermentation in lambs fed with a low-quality forage hay were evaluated. Optigen is a commercial source of slow-release urea, whereas Surelease is an ethyl cellulose-coated urea prepared in the Laboratorio de Farmacotecnia at the Metropolitan Autonomous University. Five Pelibuey lambs cannulated in the rumen and duodenum (24.8±0.4kg BW) were used in a Latin Square design. Lambs were fed a basal diet that consisted of Brachiaria brizantha hay and concentrate (ratio 67:33) with the following treatments: (1) feed-grade urea; (2) Surelease-coated urea (SRU-S); (3) SRU-S+molasses; (4) SRU Optigen (OPT); and (5) OPT+molasses. All sources of urea were dosed daily intra-ruminally (0.6g/kg/BW), and molasses was fed at 1.2g/kg BW. Compared to feed-grade urea, both sources of SRU decreased ruminal pH between 3 and 6h after dosing (P
ISSN:0921-4488
1879-0941
DOI:10.1016/j.smallrumres.2013.10.009