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Temperature Tolerance of Rice Varieties at Reproductive Stage

Dr. Md. Tariqul Islam
Principal Scientific Officer and Head
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

High atmospheric temperature causes detrimental effects on growth, yield, and quality of the crop varieties by affecting their phenology, physiology, and yield components. An experiment was conducted with eight rice varieties viz. Binasail, Iratom-24, Binadhan-18, Binadhan-5, Binadhan-6, Binadhan-14, Binadhan-10 and Binadhan-17 at pot yard and in plant growth chamber of Bangladesh Institute of Nuclear Agriculture during December 2019 to May, 2020. The temperature (36⁰C) was imposed at flowering and grain filling for 7 days in plant growth chamber. The experiment was laid out in a completely randomized design with three replications. Yield and yield attributes were recorded at maturity. Data were analyzed statistically. Results indicated that high temperature imposed both at flowering stage and grain filling stage had significant negative influence on plant parameters. Number of effective tillers plant^-1, number of grains panicle^-1, 1000-grain wt. and yield plant^-1 were decreased due to high temperature. But plant height and length of panicle was not affected. Amongst the varieties, Binadhan-5 and Binadhan-6 produced higher number of effective tillers plant^-1, Binasail, Iratom-24, Binadhan-18 and Binadhan-10 produced higher number of grains panicle^-1. Binadhan-5 showed the highest yield followed by Binadhan-18 and Binadhan-10. Yield reduction was less in Binadhan-5, Binadhan-6, Binadhan-10 and Binadhan-18 and showed some tolerance to high temperature.

Keywords: Rice, Temperature, Yield

Location: BINA, Mymensingh

Start Date: 01-12-2019

End Date: 31-05-2020

Program Area: Risk Management in Agriculture

Commodity: Rice

Objectives:

To assess the effect of high temperature (36 ⁰C) at flowering and grain filling stage on morpho-physiological parameters and yield of rice varieties and to find out temperature stress tolerant varieties

Methodology:

An experiment was conducted with eight rice varieties viz. Binasail, Iratom-24, Binadhan-18, Binadhan-5, Binadhan-6, Binadhan-14, Binadhan-10 and Binadhan-17 at pot yard and in plant growth chamber of Bangladesh Institute of Nuclear Agriculture (BINA) during December 2019 to May, 2020. The experiment was laid out in a completely randomized design with three replications. Each pot contained 8 kg soil collected from BINA farm. Recommended doses of fertilizers were used. Irrigation and cultural practices were done when required. The temperature (36⁰C) was imposed at flowering and grain filling stage for 7 days in plant growth chamber. Yield and yield attributes were recorded at maturity. Data were analyzed statistically and DMRT test was done to compare the means.

Source of Information: BINA Annual Report: 2019-20

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

High temperature imposed both at flowering stage and grain filling stage had similar significant negative influence on plant parameters. Binadhan-5, Binadhan-6, Binadhan-10 and Binadhan-18 showed some tolerance to high temperature.

Knowledge Management: Report/Proceedings