KEANEKARAGAMAN TANAMAN UMBI – UMBIAN YANG BERPOTENSI SEBAGAI PANGAN ALTERNATIF DI KECAMATAN RENDANG DAN BEBANDEM, KABUPATEN KARANGASEM, BALI

Abstract

ABSTRACT
 This study aimed to explore and identify the types of tubers, processing methods, utilization, morphological characteristics and nutritional content of tuber plants found in Rendang District and Bebandem District, Karangasem Regency. The method used was descriptive method with interview techniques, field observations, exploration, collection and documentation. The results showed there are 9 types of tubers were found, namely Manihot esculenta Crantz., Ipomoea batatas L., Colocasia esculenta L., Xanthosoma sagittifolium (L.) Schott, Amorphophallus campanulatus BI., Dioscorea alata L., D. bulbifera L., D. bulbifera L., D. hipsida Dennts, and D. aculeata. There were three variants were identified for Manihot esculenta, 5 variants of Ipomoea batatas, 4 variants of Xantosoma sagittifolium, 1 variant of Colocasia esculenta, 1 variant of Amorphophallus campalunatus, 4 variants of D. alata, 2 variants of D. aculeata, 1 variant of D. hipsida and 2 variants of D. bulbifera. The utilization of each type of tubers varies : cassava, taro, and sweet potato can be boil, grilled, steamed, fried, while the other 2 types, namely gadung and suweg, require special treatment before consumption because these tubers can cause poisoning. Utilization of other organs from the type of tubers can be used as vegetables (cassava leaves, sweet potato leaves, taro leaves, taro leaf stalks), traditional medicine (uwi and sweet potato), animal feed (taro stems, sweet potato leaves) and as a support for the family economy. The description and morphological character of each type of tuber are different. Differences in morphological characters are seen in stature, tubers (shape, structure, size, color), stem (shape, structure, size, color), leaves (shape, structure, size, color). All tubers found can be alternative carbohydrate source to rice because they have complex nutritional content.
 Key words : Manihot esculenta Crantz., Ipomoea batatas L., Colocasia esculenta L., Xanthosoma sagittifolium (L.) Schott, Amorphophallus campanulatus BI., Dioscorea spp.