In situ dry matter digestibility of three fattening diets for lambs.
Keywords:Ruminal digestion, rations, sheep.
The objective of this work was the
measure the in situ and ruminal degradability and dry matter
digestibility of three fattening diets for lambs, used by lamb
producers in the central area of Tamaulipas, México. The
nylon bag technique was used to determine in situ dry matter
digestibility, using three lambs with cannulas in the rumen,
distributed in a Latin Square design. The ruminal incubation
times were 0, 4, 8, 12, 24 and 48 h. All treatment diets (T)
used ground sorghum grain (Sorghum vulgare) as a base.
T1 included rice (Oryza sativa) polishing with 7.53% on a
dry matter basis (DM) of sorghum straw as forage; T2 had
5% DM of sorghum straw as forage; and T3 had 5% DM of
buffel grass (Cenchrus ciliaris) hay plus 3% DM of alfalfa
hay (Medicago sativa). In T1, the highest (P<0.05) value of
digestibility at 0 and 4 h was observed. For 24 h, the highest
(P<0.50) digestible fraction was obtained with T2. At 48 h,
no difference (P>0.05) was observed between treatments.
The washing loss and the degradation constant were higher
(P<0.05) for T1 than T2 and T3. The diet of T1, containing
rice polishing, produced the highest digestible fraction at
the fi rst hours of incubation in rumen (0 and 4 h). T3 was
digested in smaller proportion, although it could be the best
diet for feedlots of lambs because of the lower acidosis risk.
How to Cite
1. Proposed policy for open access journals
Authors who publish in this journal accept the following conditions:
a. Authors retain the copyright and assign to the journal the right to the first publication, with the work registered under the attribution, non-commercial and no-derivative license from Creative Commons, which allows third parties to use what has been published as long as they mention the authorship of the work and upon first publication in this journal, the work may not be used for commercial purposes and the publications may not be used to remix, transform or create another work.
b. Authors may enter into additional independent contractual arrangements for the non-exclusive distribution of the version of the article published in this journal (e.g., including it in an institutional repository or publishing it in a book) provided that they clearly indicate that the work was first published in this journal.
c. Authors are permitted and encouraged to publish their work on the Internet (e.g. on institutional or personal pages) before and during the review and publication process, as it may lead to productive exchanges and faster and wider dissemination of published work (see The Effect of Open Access).