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Potassium : Its Influence on Sugarcane Production in Ganges River Floodplain Soils of Bangladesh

F.Alam
Sugarcane Research & Training Institute, Ishurdi, Pabna, Bangaldesh.

M.A. Majid
Sugarcane Research & Training Institute, Ishurdi, Pabna, Bangaldesh.

Abstract/ Executive Summary:

An investigation was conducted in the Ganges River Floodplain Soils of Ishurdi, Bangladesh during 1988-89 and 1989-90 crop seasons with five levels of potassium (50,100, 150, 200, and 250kg K₂0/ha) and one control to determine the effect of potassium on growth response by sugarcane. Adsorption and releasing behavior of nutrients in the soil were studied through sorption study. Release of K was very negligible on addition of the element to sorgham the soil. In greenhouse study sorghum [ Sorghum bicolor (L) Moench] as an indicator plant responded in respect of dry matter yield to N, P, K, Zn and B. In the field experiments, progressive increase in cane yield compared to control was observed due to successive higher dose of K upto 150 kg K₂0 / ha in both the years and the yield increase was statistically significant. Further increase in the levels of K failed to show any positive effect on yield and yield contributing parameters of sugarcane. Potassium did not show any positive effect on percentage recoverable sucrose content of sugarcane. The highest net profit was found with the treatment 150kg K₂0/ha in both the years.

Keywords: Potassium,Sugarcane, Production,Floodplain soils,Bangladesh

Location: Ishurdi

Start Date: 00-00-1988

End Date: 00-00-1990

Program Area: Crop-Soil-Water Management

Commodity: Sugarcane

Objectives:

To evaluate the optimum requirement as well as the growth response of sugarcane to K fertilizer in Ganges River Floodplain soils of Bangladesh

Methodology:

Sixty composite soil sample were collected from Sara soil series at Ishurdi. The soil was calcareous brown flood plain, clay loam, with pH 7.5 and organic matter content 1.5%. The pH was .determined by taking soil and distilled water in 1: 2.5 ratio with glass electrode pH meter (Hunter, 1980) and organic matter was determined by wet oxidation method (Jackson, 1973). The extractant of KCI was used for the determination of exchangeable Ca and Mg and NH₄-N was measured by atomic absorption spectrophotometer (Hunter, 1980). For determination of P,K, Cu, Fe, Mn & Zn, the mixture of 0.25 N sodium bicarbonate, 0.01 M methylene diamine tetraacetic acid and 0.01 N ammonium flouride with 0.5g polyacrylamide 127 (Superfloc) per 10 liters was used. Calcium hydrophosphate was used for S & B determination. All these elements were measured by atomic absorption spectrophotomete r.

Source of Information: Bangladesh J. Sugarcane, 16 : 32-40 July, 1994

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results of the economic analysis of fertilizer use showed that application of 150 kg K₂0 ha gave the highest benefit over other treatments in both the years. Higher dose of K (200 and 250 kg K₂0/ha) became uneconomical compared to 150 kg K₂0/ha in both the years. Thus application of 150 kg K₂0/ha is profitable to growers and may be recommended for Ganges River Floodplain soils of Bangladesh.

Knowledge Management: Journal