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African Journal of Food, Agriculture, Nutrition and Development
Rural Outreach Program
ISSN: 1684-5358 EISSN: 1684-5358
Vol. 17, No. 4, 2017, pp. 12708-12721
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Bioline Code: nd17090
Full paper language: English
Document type: Research Article
Document available free of charge
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African Journal of Food, Agriculture, Nutrition and Development, Vol. 17, No. 4, 2017, pp. 12708-12721
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EFFECT OF BREED AND FEEDING STRATEGY ON THE EATING QUALITY OF KENYAN BEEF
Wambui, JM; Karuri, EG & Kanyari, PWN
Abstract
In Kenya, most of the livestock are reared on grass using extensive pastoral systems.
Nevertheless, intensive feed-lot systems to finish beef cattle have become popular among
local producers. The two systems are likely to have a different impact on the eating
quality of beef, because quality is determined by the combined effects of breed, nutrition
and management. The effect of free-range and semi-feed lot feeding strategies on the
eating quality of beef from Zebu and Sahiwal breeds was assessed. A 2 x 2 between
subjects factorial design was used (two breeds fed using two feeding strategies). From
each single breed and feeding strategy combination, seven cattle were selected after three
months of feeding. The cattle were slaughtered and their rump steaks sampled. The
samples were frozen for 24 h then thawed for 4 h prior to analysis. The steaks’ pH was
measured after cooking. They were then subjected to Texture Profile Analysis (TPA),
‘Warner-Bratzler’ Shear (WBS) tests, and organoleptic evaluations. The pH did not differ
significantly with feeding strategy or breed (P≥0.05). The result from TPA and WBS
revealed that semi feed-lot Sahiwal beef was tender than free-range Sahiwal beef
(P<0.05). On the other hand, there was no difference in tenderness between feed-lot and
free-range Zebu beef (P≥0.05). An analysis between the breeds showed that feed-lot
Sahiwal beef was tender than feed-lot Zebu beef (P<0.05), but there was no difference
in tenderness between beef from free-range Sahiwal and free-range Zebu (P≥0.05). In
the sensory analysis, there was a significant difference for each of the sensory parameters
(P<0.05, each). Steaks from semi-feed lot Sahiwal were preferred to the other beef steaks.
In conclusion, a semi-feed lot feeding strategy has the potential to improve the eating
quality of beef from Sahiwal breed. Nevertheless, the improvement in the eating quality
observed with Zebu breed, although not statistically significant, gives an opportunity for
value chain actors to explore other management systems that can be combined with those
assessed in this study to improve eating quality.
Keywords
Beef; rump steak; eating quality; Sahiwal; Zebu; feed lot; pastoral; Kenya
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