Fontes de fibra sobre a digestibilidade e comportamento ingestivo em bovinos da raça nelore confinados
Carregando...
Data
2011-08-26
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
This trial was realized in the veterinary and animal science school at Universidade
Federal de Goias. The objective was to evaluate five diets, four of these diets was
composed by ground corn with different fiber sources for each ration and one
control treatment with whole corn (MI) without fiber source. The fiber sources used
was sugar cane bagass (BIN), industrial corn residue silage (RM), soybean hulls
(CS), cotton seed (CA). Five castrated Nellore steers with an average of 195 kg of
body weight and with rumen fistulae, were used in this trial. The animals were
distributed in individual pen provided of individual covered feeder and water tank
for each two animals. Each period spent 19 days, with 10 days for food adaptation
and nine days for collect of data. During the interval of collects were evaluated:
feed behavior, ruminal pH, ammoniacal nitrogen, short chain of fatty acids, total
counting of protozoa, fecal pH, total digestibility and dry mater, crude protein (PB),
ether extract (EE), neutral detergent fiber (FDN) and acid detergent fiber (FDA)
intakes. Latin square and Duncan test for 5% of probability were used for
statistical analysis. The treatment BIN had the highest dry matter intake, although
CA had the lowest value. The ether extract intake was highest for MI treatment,
followed by CA and the CS had the lowest value. The highest values for FDN and
FDA intakes were in treatment BIN. It was observed some rejection of cotton seed
by the animals. The values for total digestibility for CA, RM, BIN, CS and MI
treatments were 68.50; 66.19; 65.87; 64.20 e 56.15. The treatment CA showed
greater DMD than CS (P<0.05). The treatments RM and BIN spent more time for
ruminating and chewing activity. The value of ruminal pH in treatment BIN was
greater than RM and CS (P<0.05). The treatments MI and CA weren´t different
from RM and CS (P>0.05). In protozoa counting the highest numbers were
observed for CS and BIN treatments. Although the lowest numbers for protozoa
counting was founded for CA. Animal differences were noted in protozoa counting.
The highest values for total short chain fatty acids were founded for CS, that was
the same of RM (P>0.05), although BIN, MI and CA had the lowest value. Highest
xiv
values for propionate and acetate were found in CS treatment. The
acetate:propionate ratios were higher in BIN, but for the others treatments the
value didn´t differed between them (P>0.05). Butyrate, ammonia nitrogen and
fecal pH any differences were found (P>0.05). It was concluded that sugar cane
bagasse was the fiber source that keep a good result for ruminal pH, protozoa
counting, dry matter intake and the total digestibility wasn´t different from the
others. According to that we can conclude that sugar cane bagasse showed more
efficient than the others fiber sources in the tested levels.
Descrição
Citação
LIMA, Douglas de Almeida. Fontes de fibra sobre a digestibilidade e comportamento ingestivo em bovinos da raça nelore confinados. 2011. 38 f. Dissertação (Mestrado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2011.