Kandungan Nutrisi dan Kecernaan In Vitro Bungkil Jarak Pagar (Jatropha curcas L.) Terdetoksifikasi

Abstract

Detoxified jatropha meal has a great potential as animal feedstuff. So far, there are no sophisticated detoxification methods available. Curcin and phorbolester are the main toxic compounds that could be eliminated by methanol extraction. However, the treatment is economically unreasonable. Alternative detoxification method using alkali and anti-tumor agent (turmeric) have been tried. Three origins of Indonesian jatropha (Lampunq =L, Kebumen =K and Lombok Timur =LT) were used to investigate the effect of 5 levels detoxificatior. methods. They were 0% (T1), 0.5% (T2), 1.0% (T3) and 1.5% (T4) of turmeric and 4% NaOH + 10% NaOCi (T5). All treatments folicwed by wet heat treatment. Nutritional and anti-nutritional composition as well as digestibility changed had been investigated. The proximate composition inclUded dry matter (DM), ash, crude protein, lipid and crude fiber had been determined. Curcin ano phorbolester contents had been detected using HPLC. Rate of organic matter fermentation to form gas was measured following Menke procedure. OMD and OMD were determined according to two step methods by Tilley and Terry. Detoxification increase CP and ash but reduce CF contents. Wet heat treatment shrank 60% of curcin content. T5 reduced 44% of phorbolester content (up to 0.65 mglg) but still could not be categorized as a safety feed for animal. The treatments protected jatropha meal from rumen degradatior. partly but not post rumen. Neither origin nor treatments influenced DMD and OMD treated jatropha