Physical Quality Testing of Purple Sweet Potato (Ipomoeea batatas L.) Majalengka Local Cultivar as Response of Organic Fertilizers with Different Time Application

• Main Author: Soraya Oktaviana, Ricka
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42810
• Institution: Institut Teknologi Bandung

Purple sweet potato (Ipomoea batatas L.) is an alternative commodity with high nutrition which has the potential to diversify food in Indonesia. But the quantity and quality of purple sweet potato cultivation still need to be improved. One solution that can be done to improve the yield of purple sweet potato is the provision of organic fertilizer and the right application time. The purpose of this study was to determine the effect of the type of organic fertilizer, fertilizer application time and the interaction of both of them on the percentage variables of quality class, diameter, length, skin color, and water content of sweet potatoes. Treatments used were a combination of organic fertilizer (goat manures fertilizer, leaves compost, bokashi, and vermicompost) and time of application (day of planting, 30 days and 15 days in prior of planting). Total of 12 treatments with three replication conducted on randomized block design with a 2 factorial. Analysis of Variance (ANOVA) on 5% level intended to test treatment effect, meanwhile difference between mean values based on LSD 5% and DMRT 5%. The results of this study show the water content significantly affected by the type of organic fertilizer, the best treatment is Goat manure fertilizer by 68.662%. The percentage of I class quality was only significantly affected by the fertilizer application time, the best treatment is the day of planting time by 27,778%. In the skin color, the interaction between the type of fertilizer and application time had a significant effect on the reddish color of sweet potato skin. The best treatment is application time of 30 days before planting with leaves compost by 20,103 and 15 days before planting with goat manure by 22.71