Growth, yield and juice quality of some selected sugarcane clones under, water-logging stress condition.

摘要

Growth, yield and juice quality of some selected sugarcane clones under water-logging stress condition was investigated at the Lalpur upazilla in Natore district of Bangladesh during November, 2006 to December, 2007. The clones were I 24-00, I 80-00, I 124-00, I 133-00, I 149-00 and water-logging commercial variety Isd 20 (standard). Data were collected on tiller production, millable cane, cane yield, Brix per cent, purity per cent, pol per cent cane, reducing sugar per cent, recoverable sucrose per cent and sugar yield and tolerance rating scale. Significantly higher number of tillers was recorded in clone I 133-00 (255.2x103 ha-1) and the lowest tiller production was observed in clone I 124 (208.3x103 ha-1). The highest number of millable cane were recorded in variety Isd 20 (114.4x103 ha-1), clones I 133-00 (110.6x103 ha-1) and I 149-00 (108.3x103 ha-1). The highest cane yield and Brix per cent were obtained in clones I 133-00 and I 149-00, respectively. The highest purity per cent was obtained in variety Isd 20 (89.3%) followed by clone I 149-00 (87.7%), while the lowest purity per cent was obtained in clone I 80-00 (85.9%). The highest pol per cent cane was found under water-logging stress condition in clone I 149-00 (13.4%) followed by clone I 133-00 (13.2%), while the lowest pol per cent cane in clone I 80-00 (12.0%). The highest recoverable sucrose per cent was obtained in clone I 149-00 (10.3%) followed by variety Isd 20 (10.2%),while the lowest recoverable sucrose per cent was obtained in clone I 80-00 (9.1%). The highest reducing sugar per cent was recorded in clone I 80-00 (1.31%) and the lowest reducing sugar per cent were obtained in clones I 149 (0.91%), I 133 (0.94%) and variety Isd 20 (0.95%). The highest sugar yield were obtained in clones I 133-00 (10.2 t ha-1) and I 149-00 (10.3 t ha-1) and the lowest was I 24-00 (6.9 t ha-1). Clones I 133-00, I 149-00 and variety Isd 20 are highly tolerant having tolerance rating scale 1 and clone I 80-00 was found to be tolerant to water-logging stress having tolerance rating 2. Clones I 24-00 and I 124-00 were found to be moderately tolerant to water-logging stress having tolerance rating scale 3 against natural water-logging stress condition. Thus, clones I 1 133-00 and I 149-00 showed the best performance in respect of cane yield, sugar yield, juice quality and utilization of potentiality breeding as parents to evolve varieties resistant to water-logging.