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Trend of Sucrose and Reducing Sugars Content in Different Sugarcane Clones

M. A. Ghafur
Bangladesh Sugarcane Research Institute Ishurdi, Pabna, Bangladesh

M. A. Jabber
Bangladesh Sugarcane Research Institute Ishurdi, Pabna, Bangladesh

S. Rahman
Bangladesh Sugarcane Research Institute Ishurdi, Pabna, Bangladesh

M. M. Kamal
Bangladesh Sugarcane Research Institute Ishurdi, Pabna, Bangladesh

Abstract/ Executive Summary:

Data on sucrose content and reducing sugars of nine sugarcane clones were collected from September, 1999 to March, 2000 by crushing randomly selected cane samples of an experiment conducted at Bangladesh Sugarcane Research Institute farm. Two regression models where sucrose as a function of sugarcane clones, time (number of months), reducing sugars in one and reducing sugars as a function of sugarcane clones and time (number of months) in the other were fitted only to determine the models to estimate their effects. Both the functions revealed that the sugarcane clones were initially different in sucrose and reducing sugars but ultimately as time passed, sucrose and reducing sugars were changed. That changes were quadratic in nature on time (number of months). However, These quadratic functions were such that sucrose was increasing slowly giving a maximum value in the 3rd week of December (4.72) while reducing sugars were decreasing gradually giving a minimum value in the 1st week of February (6.14). The relationship between reducing sugars and sucrose was found to be negatively linear which showed, for one 1 % increase of reducing sugars, 1.21 % decrease of sucrose content in cane.

Keywords: Sucrose, Reducing sugars, Regression

Location: BSRI Farm, Ishurdi

Start Date: 01-09-1999

End Date: 30-03-2000

Program Area: Variety and Species

Commodity: Sugarcane

Objectives:

1. To assess the relationships between the quality affecting factors like sucrose content and reducing sugars in cane.

2. To find out the relationship of sucrose and reducing sugars with time (month) is very essential.

3. To estimate the time of observing maximum sucrose per cent and minimum reducing sugars in cane.

Methodology:

The study was conducted with eight selected sugarcane clones viz. I 61-90, I 344- 90, BO. 91, I 155-91, I 209-91, I 41-92, I 153-92, I 216-92 and standard Isd 16. Individual clone was planted in row 20 m long in three replications. Application of recommended dose of fertilizers and normal cane management practices were done. The cane samples were collected randomly from three replications for chemical analysis. The chemical analyses for sucrose percent and reducing sugars percent were started from 15thof September, 1999; then 15th of every month and continued upto 15th March, 2000. The cane juice was clarified with basic lead sub-acetate. Brix and pol were determined with Brix hydrometer and automatic Polarimeter. The juice was analyzed for sucrose percent and reducing sugars percent using a formula given by Mathur.

Source of Information: BANGLADESH JOURNAL OF SUGARCANE, Vol. 22, pp. 110-115, July 2000, ISSN- 1991-8925.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It could be concluded that any variety or clone might show different sucrose and reducing sugars percent but the time of yielding maximum sucrose percent was the same. Similar result arose for reducing sugars percent. These quadratic functions were such that sucrose was increasing slowly giving a maximum value in the 3rd week of December (4.72) while reducing sugars were decreasing gradually giving a minimum value in the 1st week of February (6.14). The relationship between reducing sugars and sucrose was found to be negatively linear which showed, for one 1 % increase of reducing sugars, 1.21 % decrease of sucrose content in cane.

Knowledge Management: Journal