TY - BOOK AU - Siriwardene J A de S AU - Nugara D TI - Metabolizable energy of rubber seed meal in poultry diets KW - Poultry diet KW - Rubber seed meal N2 - In this study metabolizable energy value of rubber seed meal in poultry diet was determined. For this purpose one-day old white leghorn cockerel chicks were selected and they were fed by a commercial chick starter diet until two weeks of age. They were then individually weighed and divided in to four groups and fed by four different experimental diets prepared by incorporating different levels of a basal diet low in protein and rubber seed meal at varying proportions for a period of two weeks. After the experimental period the chicks were weighed to record the feed consumed. The feed and the faecal samples were analysed for moisture, crude protein content, gross energy and chronic oxide. The metabolizable energy value of each of the experimental diets was determined by applying the Sibbald and Slinger equation. The mean value for metamobilizable energy was found to be 1788 k.cals/kg. This value is similar to that of expeller coconut meal which is 1764 k.cal/kg and thus confirms the usefulness of rubber seed meal as a substitute for coconut meal in poultry feeds. No toxic manifestation were observed as a result of feeding rubber seed meal even at the 60;level ER -