Total replacement of cereals by cassava and rice polishings in diets of growing-finishing pigs
1988
Lekule, F.P. | Mtenga, L.A. | Just, A. (Sokoine Univ. of Agric., Morogoso (Tanzania). Dept. of Animal Sci. and Prod.)
The effects of feeding soaked, fresh cassava root tubers (CRT), cassava root meal (CRM) and rice polishings (RP) as the only energy sources for growing-finishing pigs were examined in growth and digestibility studies. A control diet consisting of maize and sorghum was used to replace a commonly-used commercial diet. The CRT and RP diets had significantly higher coefficients of digestion of dry matter and organic matter and higher metabolizable energy content than the control and CRM diets (P 0.001). Feed intake, feed efficiency and growth rate did not differ significantly between treatment groups. The high feed intake suggests that neither the dusty nature of cassava root meal nor the bulkiness of fresh, soaked roots reduced feed intake or energy intake of the pigs. Pigs on the control diet had a significantly lower empty body weight and a greater length and fill of the large intestine (P 0.05). Pigs fed the control diet developed significantly heavier thyroids than those on experimental diets (P 0.05). The results indicate that cassava and RP are excellent sources for growing-finishing pigs and could totally replace cereals in pig diets, provided that the diets are formulated to meet requirements for essential nutrients
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