Partial replacement of corn by cassava starch byproduct on performance and 'carcass characteristics of feedlot heifers
The objective of this work was to study the effects of partial substitution of corn grain (COR) by dry cassava starch byproduct (CAS) on feed intake, weight gain, feed conversion and carcass physical characteristics in crossbred beef heifers finished in feedlot. Fifty-four heifers, of approximately...
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Published in | Archivos latinoamericanos de producción animal Vol. 13; no. 3 |
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Main Author | |
Format | Journal Article |
Published |
Venezuela
Asociacion Latinoamericana de Produccion Animal
14.02.2006
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Subjects | |
Online Access | Get full text |
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Summary: | The objective of this work was to study the effects of partial
substitution of corn grain (COR) by dry cassava starch byproduct (CAS)
on feed intake, weight gain, feed conversion and carcass physical
characteristics in crossbred beef heifers finished in feedlot.
Fifty-four heifers, of approximately 15 mo of age and 317 kg mean
liveweight, were randomly distributed, in blocks according to breed
group, between two treatments, with 27 replicates for performance
characteristics and 9 for carcass evaluation. The animals were fed ad
libitum twice daily, with corn silage and one of two different
concentrates, based on soybean meal and either COR or half COR and half
CAS as energy source. No differences (P>0.05) were found between
treatments in the variables studied, overall mean values being: daily
weight gain (1.1 kg), dry matter (DM) intake (9.1 kg), DM intake/100 kg
liveweight (2.6 kg), feed conversion ratio (8.4), warm carcass weight
(209.3 kg), carcass weight in arrobas (13.9), carcass yield (51.7%)
carcass length (121.1 cm), leg length (71.5 cm), rump roast thickness
(25.5 cm), subcutaneous fat thickness (6.6 cm), muscle percentage
(30.5), bone percentage (15.5), and muscle plus fat:bone proportions
(5.4:1). The dry cassava byproduct can replace 50% of corn in the
concentrate without effects on performance and carcass characteristics
of crossbred heifers finished in feedlot. |
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ISSN: | 1022-1301 |