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Study on the Impact of Different Crop Establishment Methods on the Performance of Pre-monsoon/aus Rice in the Coastal Saline Environments in Bangladesh-2006

Dr Manorangan Mondal
SSO
IWMD, BRRI, Gazipur

Abstract/ Executive Summary:

An experiment were set up with the objectives of to document the performance of high yielding varieties (HYV) of Aus rice in coastal saline soil; and to determine the most suitable crop establishment method in Aus season for improving productivity of coastal saline soil in the southwest region of Bangladesh. Yield of BR14 was higher than BR26 in both line sowing and transplanting methods. Average yield of BR14 was around 5 t/ha, obtained higher rice yield in line sowing than transplanting method of rice cultivation. Whereas, higher rice yield of BR26 was harvested in transplanting method (4.5 t/ha) may be because of higher filled grains than the line sowing method.

Rainfall was about 100 mm in May and June, not sufficient to meet crop water requirements for rice. For this reason rice crop in both line sowing and transplanting method suffered from water stress. The stress condition was removed by sufficient rainfall at the later part of June. About 536 mm rainfall was occurred in July and distributed uniformly throughout the month and was responsible for higher yields of rice. Water productivity of BR14 and BR26 was about the same, except in line sowing method of BR 26. Water productivity of BR14 was about 6 kg/ha-mm in both crop establishment method, but BR26 showed different productivity in sowing and transplanting, about 4 kg/ha-mm in line sowing and 6 kg/ha-mm in transplanting method of rice cultivation.Yield of BR14 was higher than BR26 in both line sowing and transplanting methods. Average yield of BR 14 was around 5 t/ha, obtained higher rice yield in line sowing than transplanting method of rice cultivation. Whereas, higher rice yield of BR26 was harvested in transplanting method (4.5 t/ha) may be because of higher filled grains than the line sowing method.

Rainfall was about 100 mm in May and June, not sufficient to meet crop water requirements for rice. For this reason rice crop in both line sowing and transplanting method suffered from water stress. The stress condition was removed by sufficient rainfall at the later part of June. About 536 mm rainfall was occurred in July and distributed uniformly throughout the month and was responsible for higher yields of rice. Water productivity of BR14 and BR26 was about the same, except in line sowing method of BR 26. Water productivity of BR14 was about 6 kg/ha-mm in both crop establishment method, but BR26 showed different productivity in sowing and transplanting, about 4 kg/ha-mm in line sowing and 6 kg/ha-mm in transplanting method of rice cultivation.

Keywords: Coastal zone, Land productivity, Crop establishment method

Location: Fultola village under Batiaghata upazila of Khulna district

Start Date: 01-07-2005

End Date: 30-06-2006

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To document the performance of high yielding varieties (HYV) of Aus rice in coastal saline soil; and
To determine the most suitable crop establishment method in Aus season for improving productivity of coastal saline soil in the southwest region of Bangladesh.

Methodology:

In aus season 2005, the experiment was set-up at Fultola village under Batiaghata upazila of Khulna district in split plot design. Methods of planting were in the main plot and rice variety in the sub-plot and were replicated 5 times. The treatments were: Main plot: (M₁ = Line sowing, M₂ = Transplanting) and Sub-plot:(V₁ = BR14, V₂ = BR26). Two high yielding varieties (HYV) of pre-monsoon rice, BR14 and BR26 were grown under supplemental irrigated condition in Aus season 2005. Rice was grown under direct dry sowing and transplanted methods in 2 m x 10 m plots. Direct dry seeding was done on 12 April 2005 by plowing lands 4 times and with 20 cm line spacing. Transplanting was done on 9 May 2005 with 23 days old seedlings after proper land preparation with the spacing of 15 cm x 20 cm. The fertilizer rate was 135-100-70-60-10 kg urea-TSP-MP-Gypsum-Zinc sulfate per ha. The whole amounts of P, K, Zn and S were applied at the time of final land preparation. Urea was top dressed in 3 equal splits at 10, 25-30 and 40-45 days after emergence in direct seeding method and in 2 equal splits at 13 and 30 days after transplanting rice. Weeding was done 2-3 times synchronizing with the topdressing. Insecticide was applied twice to control insect pest infestation. Initially 60 mm irrigation water was provided in both line sowing and transplanting methods, discontinued supplemental irrigation when canal water salinity increased to more than 4 dS/m (as in previous experiment). The crop was then left to grow under rainfed condition. BR14 was harvested on 12 and 16 August 2005 and BR 26 was harvested on 2 and 5 August 2005 in line sowing and transplanting methods, respectively. Rice yield was determined on the basis of whole plot yield and expressed at 14% moisture content.

Source of Information: Proceedings of BRRI Annual Internal Review for 2006

Article Link (Online Journal):

Funding Source:

1. World Bank

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Yield of BR14 was higher than BR26 in both line sowing and transplanting methods. Average yield of BR14 was around 5 t/ha, obtained higher rice yield in line sowing than transplanting method of rice cultivation. Whereas, higher rice yield of BR26 was harvested in transplanting method (4.5 t/ha) may be because of higher filled grains than the line sowing method. Rainfall was about 100 mm in May and June, not sufficient to meet crop water requirements for rice. For this reason rice crop in both line sowing and transplanting method suffered from water stress. The stress condition was removed by sufficient rainfall at the later part of June. About 536 mm rainfall was occurred in July and distributed uniformly throughout the month and was responsible for higher yields of rice. Water productivity of BR14 and BR26 was about the same, except in line sowing method of BR 26. Water productivity of BR14 was about 6 kg/ha-mm in both crop establishment method, but BR26 showed different productivity in sowing and transplanting, about 4 kg/ha-mm in line sowing and 6 kg/ha-mm in transplanting method of rice cultivation.

Knowledge Management: Report/Proceedings