Abstract:
Sugarcane (Saccharum officinaram L.) is one of Thailand's industrial crops. Thailand's sugarcane production volume is at an average of 8-9 tons per rai, which is considerable lower than its competitors. Therefore, management in various areas which will affect the quantity and quality of the sugarcane is important. The commercial cane sugar (C.C.S.) is an indicator of the price of the sugar cane in the sugar industry. Based on research, it has been found that during the stalk-elongation phase, the accumulation of sugar in sugarcane will increase until maturity and ripening, at which time the accumulation of sugar will decrease as the sugar will be used for breeding. This purpose of this research is to create the Growth Model of the sugarcane and Sugar accumulation in sugarcane based on differential equations. The input data is the day after planted and the output is the sugar concentration (%brix). All data were collected from a Sugarcane field at Chonburi Province, Thailand. Comparisons of Growth model and the Stalk height measured show that is 0.9987 with mean percentage relative error of under 3% and comparisons of sugar accumulation model and sugar concentration in stalks measured show that is 0.9684 with mean percentage relative error of around 0.5%, 3%, 5.3% for average sucrose concentration data for each harvest time, average sucrose concentration of stalks and every single stalk, respectively.