MATEMATICAL MODELLING OF ANTOCYANIN AND BETACAROTENE TOTAL IN PURPLE SWEET POTATO (IPOMEA BATATAS) DURING THE BULB FILLING PHASE WITH APPLICATION OF LIQUID ORGANIC FERTILIZER FROM MARMOT (CAVIA PORCELLUS) WASTE

• Main Author: Kharismawati, Rahma
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/65987
• Institution: Institut Teknologi Bandung

Purple sweet potato is an agricultural commodity that has the potential to be developed into functional local food because it has a high nutritional content, including anthocyanin and beta-carotene compounds. However, the plant cultivation process is not optimal because of the use of synthetic fertilizers that can degrade the land. The use of organic fertilizers can be one solution to this problem. One of the organic fertilizers that can be used is liquid organic fertilizer from guinea pig waste. This study aims to determine the total anthocyanins and beta-carotene and their mathematical models in the Ayamurasaki variety purple sweet potato during the tuber filling phase with the application of liquid organic fertilizer from guinea pig waste. The method used in the cultivation process refers to the purple sweet potato cultivation procedure from BALITKABI. Anthocyanin levels were determined using the Lees & France method (1972) and beta-carotene levels were determined using the AOAC method (1908). Mathematical modeling is made using MATLAB software. The results showed that the mathematical model that represents the total anthocyanins in purple sweet potato (Ipomoea batatas L.) is the Gaussian model with the equation f(x) = 2837*exp(-((x-136.8)/ 31.292). While the mathematical model that represents the total beta-carotene is the Gompertz Model with the equation f(x) = (-19.98)*e- (-0.9042)*e^(-(-1.2)*x).