Extruded mixture of sweetpotato and copra meal (ESPCM) as partial direct replacement of corn in broiler and layer diets
1999
Roxas, D.B. | Luis, E.S. | Ramos, S.M. | Bautista, M. | Perez, C.B. | Baconawa, E.T. | Baledad, A.E. (Philippines Univ. Los Banos, College, Laguna (Philippines))
A total of 180 broiler chicks and 54 layer pullets were randomly distributed to three treatments. Treatment 1 served as the control while treatments 2 and 3 consisted of diets of 20 percent and 30 percent ESPCM [extruded mixture of sweetpotato and copra meal, respectively. Findings of the study showed the following: ESPCM can replace up to 20 percent of corn in layer diets and 30 percent of corn in the broiler diets without significant depression in feed intake, egg production and egg weight in layers and live weight gain and feed efficiency in broilers. In broilers, dressing percentage was likewise not affected; the only noticeable difference was the color of the meat. Corn-fed chickens had cream-colored meat, while ESPCM had flesh-colored meat. In layers, feed efficiency (feed per no. of eggs and per egg weight) was markedly affected even with only 20 percent ESPCM. At 30 percent level, egg efficiency dropped by 8 percent. Replacing corn with ESPCM affectd (P.05) the egg yolk color at 30 percent level, but not at 20 percent. Using ESPCM to replace corn lowers the cost of production due to high cost of corn feeds. Likewise, ESPCM can be the answer to the recurring shortage of corn
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