Abstract
Glucose in sugarcane affected cane yield, recoverable sugar, and sugar yield. Glucose is available since the formation of the stems and stored until sugarcane is ready to be harvested. Information regarding the need for glucose to form sugarcane plant tissue is still not widely available. So, research was conducted to determine the quantity of glucose to form sugarcane plant tissue and its relation to cane yield, recoverable sugar, and sugar yield obtained. The research was carried out at the Karangploso Research Station and Laboratory of Plant Chemistry, Indonesian Sweeteners and Fiber Crops Research Institute, in July 2016–September 2017. A split plot design with two factors and three replications was utilized. The main factor was the growth phases, namely, the vegetative phase and maturity phase, while the other factor was sugarcane varieties, namely, PS-881 (early mature), JR-01 (early-middle mature), Kenthung (early-middle mature), and Bululawang (middle-late mature). The measurements of nitrogen, carbon, and the ash content of the leaves and stems were at 5 months (representing the growth period) and 9 months (representing the ripening period). The results showed that quantities of 1.962–2.160 kg and 2.066–2.113 kg glucose were required to form each kg of leaf and stem tissue depending on the growth phase and variety. Glucose requirements in the maturing phase affected the cane yield, recoverable sugar, and sugar yield as much as by 51.48%, 57.60%, and 58.26%, respectively.
Highlights
Introduction eIndonesian sugar production was 2.212 million tonnes in 2017, while the projected national sugar consumption demand would be 2.825 million tonnes in 2019 so that the shortfall needs to be imported. e sugar production needs to be increased to achieve self-sufficiency of household sugar demand.e production can be obtained by increasing the productivity of cane yield and sucrose content as well
Recoverable sugar, and sugar yield were influenced by the varieties used (Table 1)
The relationship between sugar yield and recoverable sugar (RS) and cane yield (CY) was calculated with sugar 0.9205 RS + 0.9311 CY − 0.8552 with a correlation coefficient (r) of 1.00. ese results mean that 100% of the sugar yield was determined by the recoverable sugar and cane yield. e effect of recoverable sugar and productivity on the sugar yield was 49.13% and 50.87%, respectively
Summary
Introduction eIndonesian sugar production was 2.212 million tonnes in 2017, while the projected national sugar consumption demand would be 2.825 million tonnes in 2019 so that the shortfall needs to be imported. e sugar production needs to be increased to achieve self-sufficiency of household sugar demand.e production can be obtained by increasing the productivity of cane yield and sucrose content as well. E sugar production needs to be increased to achieve self-sufficiency of household sugar demand. Cane yield is cumulative of glucose available for stem growth during the formation of the stem until the stem is harvested [14]. E sugar yield is the result of the accumulation of sucrose deposits in the stem during the ripening phase to harvest [8]. Glucose is derived from the results of daily photosynthesis after being reduced by the process of respiration maintenance [15]. Glucose produced by daily photosynthesis is used for respiration maintenance, and the rest is used for growth and storage [10]. Each sugarcane variety requires different amounts of glucose to form root, stem, and leaf tissues depending on the organic compounds that make it up [13]
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