REKAYASA PENYIMPANAN UBI KAYU (Manihot esculenta Crantz) DENGAN VARIASI CARA PENIMBUNAN DALAM TANAH SEBAGAI UPAYA UNTUK MEMPERPANJANG UMUR SIMPAN

• Main Authors: , ARISTA ANDIANI, , Sri Rahayoe, STP. MP
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/121547/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=61635
• Institution: Universitas Gadjah Mada

Generally, Indonesian farmers store cassava in plastic bags or bamboo baskets, and stacked it in room temperature. This method causes cassava has direct contact with air, so the crops decay soon. The objectives of this research are to extend shelf life of cassava by under-ground storage with various kinds of based materials. This research also examines the changes of parameter determining the quality of cassava during storage and determine the rate of change of the quality of the model based on the parameters tested. In this research cassava was stored in the soil pit with size of 40x40x50 cm with 3 various kinds of bases and covered material. The materials are straw, plastic followed by straw, and sand followed by straw. During the storage, deterioration of the quality of cassava such as weight loss, hardness (texture), physical appearance, moisture content and chemical composition observed every 5 days until the process is considered complete. Zero order and first order of kinetic equation were used to analyzed data. As control, this research also evaluate the general method that used by farmers to store cassava. At the final stage of the evaluation, statistical analysis (Duncan Method) was used to determine the effectiveness of the methods. The results of this research show that the storage with hoarding method for all treatments can extend the shelf life of cassava for at least 30 days. The smallest rate of weight loss occured in third treatment with sand and straw. The smallest rate of hardness occured in second treatment with plastic and straw. The smallest rate of moisture content occured in plastic bags storage. The results are not significantly different among the three treatments, but significantly different with the control. The smallest rate of weight loss, hardness and moisture content are k=0,0632 %/day, k=0,0144 %/day and k=0,0019 %/day respectively. During storage, the chemical composition of cassava was decrease for both methods. In general all of treatments can give a better effect to the cassava than the farmer�s method.