This study aimed to determine the chemical composition and gas production based on fermentation in rumen of nine types forage tropical feed commonly used Indonesia. The forages this were: mahogany leaves (Swietenia mahagoni L. Jacq.), tayuman (Bauhinia purpurea), bamboo (Bambusa arundinaceae), canary (Canarium indicum L.), tea (Camellia sinensis), ketapang (Terminalia catapa lamtoro (Leucaena l...