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Prospect of Growing Summer Cotton in Saline Area of Bangladesh

Md.Akhteruzzaman
Additional Director (Research and Planning)
Cotton Development Board,Room No:523,4th Floor,3rd Building,Khamarbari,Farmgate,Dhaka-1215

Md. Abu Elias Miah
Deputy Director
Cotton Development BoardCGA Building-1, Agrabad,Chittagang

Abstract/ Executive Summary:

This experiment was conducted in a farmer’s field at Tala Upzilla on 2009-2010 to evaluate cotton yield in saline soil under two sowing methods and time. The experiment was arranged in Factorial Randomized Complete Block Design (FRCBD) including four treatments such as, Direct Seed Sowing in December (DSSD); Polybag Seed Sowing in December (PSSD); Direct Seed Sowing in February (DSSF); Polybag Seed Sowing in February (PSSF) with three replications. Significant variation among the treatments were observed for plant shoot elongation rate, no. of vegetative branches per plant, single boll weight, days to first flowering and days to first boll splitting. Significant differences among the treatments were not seen for no. of primary fruiting branches per plant, effective bolls per plant and for seed cotton yield. Better plant establishment was exhibited in PSSD and PSSF where polybag-seedlings were transplanted. DSSF and PSSF showed higher seed cotton yield (2.17 - 2.25 ton/ha) with earliness due to higher rate of initial plant shoot development up to 71 days after sowing (DAS) and with lowest values of vegetative branches per plant, days to first flowering and days to first boll splitting. Here the time of sowing was mainly responsible to make the result significant.

Keywords: Cotton yield, Saline soil, sowing methods, sowing time.

Location: This experiment was conducted in a farmer’s field situated in the village of Nolta at Tala Upazilla under Satkhira district of Bangladesh

Start Date:

End Date:

Program Area: Knowledge Management

Commodity: Cotton

Objectives:

1)To know the proper time of sowing for better yield of cotton in coastal saline soil.

2)To know the proper method of sowing for well plant establishment of cotton in saline area.

Methodology:

The experiment was arranged in Factorial Randomized Complete Block Design (RCBD) including four treatments such as, Direct Seed Sowing in December (DSSD); Polybag Seed Sowing in December (PSSD); Direct Seed Sowing in February (DSSF); Polybag Seed Sowing in February (PSSF) with three replications. Unit plot size was 4x10 square meter including five cotton lines and plant spacing provided 40 cm from plant to plant and 80 cm from line to line. Sowing of seeds was done in DSSD and PSSD on 14, December, 2009 and in DSSF and PSSF on 4, February, 2010. Transplantation in PSSD and PSSF were done on 1st January, 2010 and 26, February, 2010 respectively. Final harvesting was done on 28, June, 2010. Delinted cotton seed of the variety Rupali-1 and other inputs were supplied by Supreme Seed Company LTD, was sown in this experiment. In case of PSSD and PSSF, 50% field soil and 50% full-decomposed cow dung were properly mixed together at first and then used into the poly bags for seedling production.Both chemical and organic fertilizers were used in this experiment.The crop was infested by Aphid, Jassid and Spodoptera at the vegetative 3 and flowering stages which were controlled by proper application of insecticides as per recommendation of Cotton Development Board (CDB). Other intercultural operations such as thinning, gap-filling, weeding, mulching, earthling-up etc were done properly whenever those were needed. Soil salinity was managed by applying frequent irrigation (STW) water and mulching was done by half decomposed leaves available at that locality, to reduce the evaporation. Data on seed germination was collected and expressed in percentages. All other data were statistically analyzed and estimated ANOVA according to Zaman, et al. 1982.

Source of Information: SAARC J. Agri.,9 (2) : 101-105 (2011)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results of this experiment indicated that well plant establishment of cotton is comparatively easy through seedling plantation than direct seed sowing in saline soil.Seedling production through poly bags may be an important tool during the month of December and January. Direct seed sowing or seedling transplantation of cotton in February, increases plant elongation rate that leads positively of it’s earliness with better yield in saline soil. These results are also supported by Sharma,A.B.(2004).Based on these results, it could be concluded that February sowing of summer cotton is found promising irrespective of sowing method in saline area of Bangladesh.

Knowledge Management: Journal