J. Anim Sci.
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J. Anim Sci. 1984. 58:812-820.
© 1984 American Society of Animal Science
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Evaluation of Methionine Supplementation to Diets Containing Cassava Meal for Swine

Guillermo Gómez1,2,, Jorge Santos and Mauricio Valdivieso

Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia

Abstract

The effect of methionine supplementation to diets conatining high levels (~ 65%) of cassava meal (CM) were studied with gestating and lactating gilts as well as with growing-finishing pigs. In both experiments, methionine supplementation did not improve (P>.05) the results obtained with the unsupplemented diets. Handling of the feed during the gestation period could explain the differences found in relation to those previously reported; group-feeding appeared to be responsible for the poorer reproductive performance previously obtained with CM-based diets. Diets for growing-finishing pigs based on CM and soybean meal produced results similar to those of the control diet (yellow corn-soybean meal), irrespective of methionine supplementation. Further studies using least-cost diets formulated to include 30% CM for gestating and lactating gilts, 40% CM for baby pigs and 20 and 30% CM for growing-finishing pigs produced normal performance and required balancing, when necessary, with less than .06% methionine. The CM price used was equivalent to 80% of the current sorghum price. Combinations of CM with soybean meal or with soybean meal-cottonseed meal-fish meal resulted in well-balanced least-cost diets.

Footnotes

1 Head, Research Associate and Assistant, respectively, of the Utilization Section of the Cassava Program.

2 Present address: Centro Agronómico Tropical de Investigación y Enseñanza, CATIE 7170, Turrialba, Costa Rica. To whom reprint requests should be sent.






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