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The purpose of this study is to provide an overview of the potential forage crop in oil palm plantations in terms of botanical composition, production, and chemical composition to estimate the carrying capacity of oil palm plantations at the age of 3 years and 6 years for beef cattle. Data collection was conducted in Samboja district, Kutai regency, East Kalimantan province, from January to March 2013. Plant samples were taken under oil palm plantations age 3 years and 6 years. Each age of plantation were taken 5 hectares, and every hectare were picked 10 points by using the quadrant size of 1 m x 1 m at random. The result showed that plants growing on palm oil plantations 3 years dominated by Paspalum conjugatum (45.54%), followed by Mikania micrantha (9.93%), and Ottochloa nodosa (7.89%). While the age of 6 years dominated by Ottochloa nodosa (33.89%), Melastoma malabatrichum (28.23%), and Paspalum urvillei (8.37%). Dry weight production of plantation age 3 years was 3,205.1 kg ha-1 decreased to 1,165.4 kg ha-1 in plantation age 6 years. Chemical composition, especially CP increased from 8.25% at the age 3 years to 10.5% at the age 6 years, while CF decreased from 23.20% at the age 3 years to 22.43% at the age 6 years. Carrying capacity of oil palm plantations age 3 years was 1.44 AU ha-1 yr-1 and age 6 years was 0.71 AU ha-1 yr-1. Naturally, oil palm plantation in Kutai regency, East Kalimantan has good potential as a source of beef cattle forage.
Key words: Oil Palm, Botanical Composition, Forage, Chemical Composition, Carrying Capacity
