J. Anim Sci.
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J. Anim Sci. 1972. 35:865-870.
© 1972 American Society of Animal Science
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Pressure Cooked Urea-Cassava Meal for Lambs Consuming Low Quality Hay

T. A. Shultz1, Elena Shultz2 and C. F. Chicco3, 4,

Centra de Investigaciones Agronomicas, Maracay, Venezuela

Abstract

FOUR groups of lambs were fed a low quality hay for 90 days. One group served as a control while the others received one of the following isocaloric, isonitrogenous supplements: sesame-cassava meal; uncooked urea-cassava meal, and pressure cooked urea-cassava meal.

Average daily gains were 17, 67, 35 and 49 g for the respective treatments (P<.05). Less organic matter and cellulose were digested by the control. Nitrogen retention for the respective treatments was 0.6, 3.8, 2.6 and 3.7 g/anim/day with differences being significant except between the sesame and cooked urea diets. The uncooked urea supplement presented higher levels of rumen ammonia at 11/2 hr., and more blood urea at 6 hr. post-consumption of the supplement. The cooked urea-cassava supplement resulted in more microbial nitrogen than the uncooked substrate at 6 and 24 hr. and was equal to the vegetable supplement at 24 hr. post-consumption. Plasma protein levels were higher for the supplemented groups than the control group. All supplements produced more individual and total volatile fatty acids than the control. The urea-cassava treatments presented more propionic, butyric and total acids than the sesame-cassava diet, while the reverse was true for isovaleric acid.

Footnotes

1 Facultad Ciencias Veterinarias, Universidad Central, Maracay, Venezuela.

2 Centro Investigaciones Veterinarias, Ministerio Agricultura y Cria, Maracay, Venezuela.

3 Centro de Investigaciones Agronómicas, Ministerio Agricultura y Cria, Maracay, Venezuela.

4 Acknowledgements are made to Dr. J. de J. Montilla for supplying the cassava and pertinent information concerning this feedstuff and to Dr. R. Barreto M. for supervising the pressure cooking process.






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Copyright © 1972 by the American Society of Animal Science.