Effect of concentrate supplementation on fattening performance and quality of carcass and meat of crossbred and small East african goats
Loading...
Date
2011
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Sokoine University of Agriculture
Abstract
Forty eight castrated goats (24 Small East African x Norwegian crossbreds and 24 Small
East African), IS months old with average body weight of 16.7 kg were used to evaluate
effect of genotype and concentrate supplementation levels on fattening, quality of carcass
and meat and ultimately economics of fattening. Goats were randomly allocated into three
diets varying in concentrate levels in a 2 x 3 factorial arrangement fed for 84 days. The
concentrate levels were; no access to concentrate (TO), 66 % access to ad libitum
concentrate allowance (Tl) and 100 % access to ad libitum concentrate allowance (T2). In
addition to the supplement goats were grazed, fed hay and drinking water. Diet had
significant (P<0.01) effects on total DM intake. T2 goats had 145 and 110 g higher
(P<0.05) total DM intake than TO and Tl goats respectively. TO goats were 3.3 kg and 2.6
kg lower (P<0.05) in final BWT than those in T2 and Tl respectively. Supplemented goats
had significantly (P<0.05) higher daily gain, body condition score, better feed conversion
efficiency, dressing percentage and EUROP scores for conformation than TO goats. Diet
had a significant effect (P<0.00I) on all killing out parameters. Increasing level of
concentrate increased (P<0.05) fatness and DM of the meat and decreased (P<0.05) water
in meat, without affecting that of ash, protein and chemical fat. Although thawing loss for
LD muscle increased (P<0.05) with ageing, cooking loss and WBSF improved (P<0.05)
with ageing. The lowest WBSF values were recorded for M. Psoas major and
Infraspinatus. Among supplemented goats the cost of 1 kg gain under Tl was Tsh 213
cheaper than T2. It was concluded that goats should be grazed and supplemented with 400
g of concentrate for satisfactory fattening performance, meat quality and higher economic
return of the enterprise.
Description
Masters Thesis
Keywords
Effect, Concentrate supplementation, Fattening performance-quality, carcass - meat, Crossbred -small, East African, Goats