*M.S. Islam
Bangladesh Sugarcane Research Institute (BSRI), Ishurdi-6620, Pabna, Bangladesh.
M.K. Begum
Bangladesh Sugarcane Research Institute (BSRI), Ishurdi-6620, Pabna, Bangladesh.
Sugarcane. Water logging. Leaf area index (LAI). Cane yield and Quality
In the experimental field and laboratory of the Physiology and Sugar Chemistry Division of Bangladesh Sugarcane Research Institute (BSRI). Ishurdi-6620. Pabna, Bangladesh
Crop-Soil-Water Management
Sugarcane, Waterlogging
The trial was conducted during November, 2006 to December, 2007 at the experimental farm and laboratory of the Physiology and Sugar Chemistry Division of the Bangladesh Sugarcane Research Institute ( BSRI). Ishurdi-6620. Pabna, Bangladesh. The site is located at 24°8' North latitude and 89°04' East longitude and situated about 15.5 m above the mean sea level. The experimental site represents the High Ganges River Flood Plain soils under the AEZ 11. The experiments were done in calcareous high land soil. The soil belongs to Sara series of calcareous soil. The soil was sandy loam in texture having pH 7.62. organic carbon 0.88%, total N (0.05%), available phosphorus 16.00 tg g soil-1, available sulphur 17.0 lig g soil-1, exchangeable potassium 0.13 meq 100 g soil-1 and available zinc 0.77 mg kg soil-l. Five selected sugarcane clones viz. I 24-00, I 80-00, I 124-00, I 133-00, I 149-00 and one water-logging tolerant variety Isd 37 were tested. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Two budded setts were planted at furrow following end to end method of planting on November 20, 2006. Row to row distance was maintained 100 cm. NPKS fertilizers were applied @ 325kg urea. 250 kg TSP. 190 kg MoP, 180 kg Gypsum and 9 kg ZnSo4 per hectare. Urea was applied in 3 splits and MoP was applied in two splits. Total TSP, ZnSO4, half MoP, one third urea were applied at planting. Rest of urea and MoP were applied as top dressing. To control insect pests, chlorpyrifos (trade name: regent 3 GR) was applied @ 33 kg had during planting and carbofuran (trade name: furadan 5G) was applied @ 40 kg ha-1 in two splits between March to May, 2007. All cultural practices were done as and when required. The experimental field was inundated and maintained at least 90 cm deep water for 120 days (15 June to15 October). Tillering was recorded at an interval of 30 days starting from March until August. Millable cane and cane yield were recorded at harvest on December 25, 2007.
Data were collected following the procedure below
Leaf area plant-1 (cm2): Leaf areas of all separated leaves of each plant from one squire meter area were measured with the help of leaf area meter. It was performed soon after harvesting to avoid curling of the leaves.
Leaf area index (LAI): Leaf area index was computed by using the following formula:
LAI = Leaf area (cm2) / Ground area (cm2)
Chemical analysis of sugarcane juice: Chemical analyses of sugarcane juice for Brix (%), pol (%), purity (%) and reducing sugar (%) were done at harvest of sugarcane. Randomly selected 15 sample cane stalks were crushed with a mini power crusher to get juice for analysis. Brix was determined by Brix hydrometer standardized at 20°C and sucrose determination was done using automatic Polarimeter (ADP-220) by Home's dry lead method. Pol percent cane was calculated by the method prescribed in Queensland Laboratrry Manual (Anon, 1970), while reducing sugars were measured by Lanc and Eynon method (Chen, 1985).
South Asian J. Agric. 2012.5 (18E2): 25-31 ISSN 1991-0037
Journal