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Performance of Drought Tolerant Nerica and Green Super Rice Genotypes in Different Seasons and Locations of Bangladesh

MD. SIRAJUL ISLAM, PhD
Program Head, Agriculture and Food Security Program, BRAC
BRAC Centre, 75 Mohakhali, Dhaka 1212, Bangladesh. Phone: +88 02 9881265 Ext: 3357, Cell: +88 01714 106 525, Email: sirajul.i@brac.net

Abstract/ Executive Summary:

An experiment was carried out at BARDC, Gazipur during Aman 2011 and Boro 2012 and in Rajshahi during Boro 2012 to evaluate the performance of NERICA and GSR genotypes under drought condition. NERICA materials are said to be drought tolerant. On the other hand, GSR genotypes are designed in a way that they are much more capable in drought situation. Hence, artificial drought was created by withdrawing irrigation water at key growth stages. Five drought tolerant rice genotypes were used as experimental materials. These were N4, N10, N20, GSR IRRI I 2 and GSR IRRI I 40. The experiment was laid out in randomized complete block design with 3 replications. The rice genotypes differed significantly (P<0.05) with respect to plant height, panicle production, spikelet panicle^-1, filled grain panicle^-1, spikelet fertility, thousand grain weight and yield. Spikelet panicle^-1 and spikelet fertility was the highest in GSR IRRI I 40 in both Aman 2011 and Boro 2012 seasons in Gazipur. In Rajshahi, panicle m^-2 was the highest in GSR IRRI I 40 and spikelet fertility was the highest in GSR IRRI I 2 during Boro 2012. The Highest grain yield was observed in GSR IRRI I 40 in both seasons and locations.

Keywords: NERICA, Green Super Rice, Genotypes, Yield

Location: BRAC Agricultural Research and Development Centre (BARDC), Gazipur and Rajshahi

Start Date: 15-03-2011

End Date: 15-05-2013

Program Area: Variety and Species

Commodity: Rice

Objectives:

To find a suitable drought tolerant genotype for rainfed and irrigated ecosystem in Bangladesh under artificial drought situation

Methodology:

The experiment comprised of five genotypes viz. N4, N10, N20, GSR IRRI I 2, GSR IRRI I 40. The experiments were laid out in randomized complete block design with three replications. The row to row distance was 20 cm and plant to plant distance was 15 cm where the unit plot size was 20 m² (5m x 4m) in three locations. Firstly, the land was puddle thoroughly by ploughing and cross ploughing two times by power-tiller followed by laddering. Urea, TSP, MOP, Gypsum and ZnSO₄ fertilizer were applied at the rate of 180, 80, 70, 60, and 10 kg ha^-1 during Aman season and 270, 130,120, 60 and 10 kg ha^-1 during Boro season. The whole amount of triple super phosphate, gypsum, zinc sulphate, two third of murate of potash and one third of urea was mixed properly and applied as basal application. The rest amount of MOP was applied before flowering stages for uniform flowering. The remaining urea was applied in two equal splits at 20 DAT and the third dose was applied 5 days before flowering. Gap filling and weeding was done accordingly. In Aman season, no supplementary irrigation was given in the whole crop cycle except before fertilization and in Boro, artificial drought stress was created by withdrawing irrigation till the soil became cracked with visual observation. Irrigation was given two times before urea split application. To avoid the infestation of stem borer at the growth stage and flowering stage, insecticide was sprayed two times in the experimental field. Other agronomic management was taken as and when necessary.

Source of Information: Islam M.S., M.M. Rashid, M.A. Kabir and M.R. Karim. 2013. Performance of drought tolerant NERICA and Green Super Rice genotypes in different seasons and locations of Bangladesh. Bangladesh Agron. J. 16(1): 45-50.

Article Link (Online Journal):

Funding Source:

1. Department for International Development (DFID)	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

Genotype GSR IRRI I 40 had the best agronomic performance for grain yield and other yield parameters in both the seasons and locations, whereas lowest yield showed by N4 during Aman 2011 in Gazipur, N10 during Boro 2012 in Gazipur and N20 during Boro 2012 in Rajshahi. As we have shortage of drought tolerance variety, so genotype GSR IRRI I 40 might be a potentials suitable genotype for drought prone areas.

Knowledge Management: Journal