Malays. Appl. Biol. (2008) 37(1): 31–36
STALK YIELD AND CARBOHYDRATE COMPOSITION OF SWEET SORGHUM (SORGHUM BICOLOR (L.) MOENCH) CULTIVARS AND LINES AT DIFFERENT GROWTH STAGES
ALMODARES, A.*, TAHERI, R. and ADELI, S.
Biology Department, College of Science, University of Isfahan, Isfahan, Iran
*E-mail:
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
ABSTRACT
Sweet sorghum (Sorghum bicolor (L.) Moench) is a multiple-purpose crop which has been consumed as either food or feed and recently, industrially cultivated for liquid sugar and ethanol production. Biomass and carbohydrate composition of sweet sorghum are considered as important factors for industrial productions. Thus, in this study fresh stalk yield, total sugars, sucrose content and invert sugars of five sweet sorghum cultivars and four sweet sorghum lines were evaluated. The plants were harvested at soft dough, hard dough and post grain maturity stages. The highest amount of total sugar, sucrose content, invert sugars and fresh stalk yield were obtained in cv Rio (hard dough stage), cv Rio (hard dough stage), cv Vespa (maturity) and cv Sova (hard dough) respectively. The lowest of aforementioned parameters were found in cv Turno (soft dough), cv Turno (soft dough), line IS 4546 (maturity) and line IS 4546 (soft dough) respectively. The mentioned parameters were reduced by delaying harvest time of sweet sorghum cultivars and lines. At hard dough stage, sucrose and total sugar exhibited a positive correlation, while the correlation between sucrose and glucose, fructose and maltose was negative. Mannose, galactose and arabinose were not detected in sweet sorghum juice. The obtained results showed that the optimum harvest time for all sweet sorghum cultivars and lines should be conducted before post seed maturity.
Key words: sweet sorghum, stalk yield, carbohydrate composition, sugar, ethanol
REFERRENCES
Almodares, A., Sepahi, A. & Karve, A.D. 1994. Effect of planting date on yield and sugar production of sweet sorghum. Anal Plant Physiology. 8: 49-54.
Almodares, A., Sepahi, A. & Shirvani, M. 1997. The effects of planting date and genotype on carbohydrate production from sweet sorghum in South Iran., Anal Plant Physiology. 11: 1-5.
Anglani, C. 1998. Sorghum for human food – A review. Plant Foods Human Nutrition. 52: 85- 95.
Belayachi, L. & Delmas, M. 1997. Sweet sorghum bagasse: a raw material for the production of chemical paper pulp. Industrial Crop Production. 6: 229-232.
Biermann, C.J. & Mcginnis, G.D. 1989. Analysis of carbohydrate by GLC and MS. CRC Press Inc.
Cowley, W.R. & Lime, B. 1976. Fuels from sugar crops” Conf. Poc. (Cited in Ferraris and Stewart, 1979).
Doggett, H. 1988. Sorghum, 2nd ed. Longman, Green and Co. Ltd, London.
Dolciotti, I., Mambell, S., Grandi, S. & Ventur, G. 1998. Comparison of two Sorghum genotypes for sugar and fiber production. Industrial Crop Production. 7: 265-272.
Ferraris, R. 1981. Early assessment of sweet sorghum as an agro- industrial crop. 1. Varietal evaluation. Aust. Journal of Exprimantal. Agricalture Animal. Husb. 21: 75-82.
Gnansounoua, E., Dauriata, A. & Wyman, C.E. 2005. Refining sweet sorghum to ethanol and sugar. Economic trade-offs in the context of North China. Bioresourse Technology. 96: 985- 1002.
Kresovich, S. & Paul, R. 1984. Agronomic potential of sorghum as a raw material for ethanol production in Central Ohio. Henderlong. Energy in Agriculture. 3: 145-153.
Lane- Eynon. 1970. Encyclopedia of Industrial Chemical Analysis. 10: 562-563.
Lingle, S.E. 1987. Sucrose metabolism in the primary culm of sweet sorghum during development. Crop Science. 9: 55-58.
Mnminov, N.Sh. 1997. Dynamic of the accumulation of sugars in sweet sorghum. Chemical Natural Compounds. 33
Monk, R.L., Miller, F.R. & McBee, G. 1984. Sorghum improvement for energy production. Biomass. 6: 145-153.
Nan, L. & Jianxue, Ma. 1989. Research on sweet sorghum and its synthetic application. Biomass. 20: 129-139.
Naoyuki, T. & Goto, Y. 2004. Cultivation of sweet sorghum (Sorghum bicolor (L.) Moench) and determination of its harvest time to make use as the raw material for fermentation, practiced during rainy season in dry land of Indonesia. Plant Production Science. 7: 442-448.
Negro, M.J., Solano, M., Ciria, L. & Carrasco, J. 1999. Composting of sweet sorghum bagasse with other wastes. Bioresource Technology. 67: 89-92.
SAS Institute. 1997. SAS/STAT User’s Guide, 6.12 Ed., SAS Institute, Cary, NC.
Padilla-Zakour, O. 1999. Manufacture of low sugar. The Newsletter of the New York State Food Venture Center. 2
Varma, N.C. 1988. System of technical control for cane sugar factories in India. The Sugar Technologist’s Association, India.
Woods, J. 2000. Integrating Sweet sorghum and sugarcane for bioenergy: Modelling the potential for electricity and ethanol production in SE Zimbabwe, Ph.D. Thesis, King’s College, London.