Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Grain Growth Pattern and Yield Performance of Some Transplanted Aman Rice Cultivars in Relation to Moisture Stress

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

R. Gretzmacher
Professor
University of Agricultural Sciences, Vienna, Austria

Abstract/ Executive Summary:

Two pot experiments were conducted at the Bangladesh Institute of Nuclear Agriculture Mymensingh, in 1997 and 1998, to observe the morpho-physiological changes of nine rice genotypes under water stress and to identify stress tolerant genotype. Field capacity (30% ) was maintained at booting and flowering and 100% FC was maintained in the control plants. Separately 30% FC and 100% FC were maintained for grain growth. Plant height, panicle number panicle length, 1000-grain weight, harvest index (HI), total dry matter (TDM) and yield were suppressed with the stress. Dry weight and water content grain^-1 decreased with water stress. Grain dry weight increased significantly from panicle emergence to 18 days thereafter no increase was observed. But water grain^-1 increased from panicle emergence to 6 days thereafter it gradually decreased to 18 days. Grain dry matter at different harvests was negatively correlated with water content grain^-1 under control and water stress conditions. Gram dry matter accumulation from panicle emergence to 21 days was positively correlated with grain size under both conditions. Binasail showed the best performance under water stress producing the highest TDM HI and yield compared to other genotypes. G-67 ranked second in respect of stress tolerance.

Keywords: Grain growth, Rice, Yield, Moisture stress

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 01-07-1997

End Date: 31-12-1998

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The objectives of the study were to observe the morpho-physiological changes of rice genotypes under water stress as well as to identify stress tolerant genotype.

Methodology:

Two experiments were conducted in pots at the Bangladesh Institute of Nuclear Agriculture, Mymensingh during the period from July to December of 1997 and 1998. The soil was sandy loam in texture. Three treatments viz. 30% FC at booting stage, 30% FC at flowering stage and control (100% FC) and 9 rice genotypes were included in this study. Grain growth studies were also performed from plants under the stress of 30 FC and control (100% FC) during panicle emergence to maturity. Each pot contained 4 kg of sun dried soils. Nine rice gentoypes, viz. BR 22, BRRI dhan31, BRRI dhan32, Nizershail, Binashail, Binadhan-4, BINA-163, local cultivars G-32 and G-67 were used. The stress treatments were imposed by adding measured amount of water. Urea, TSP, MP and Zinc sulphate at the rate. 432 mg, 132 mg, 200 mg and 72 mg, respectively, in each pot, which were 2.5 times higher than the normal rate of 60 kg N, 18 kg P₂O₅, 36 kg K₂0, 8 kg Zine sulphate ha^-1 were used. One seedling of 30 days old was transplanted on 21 August to each and maintained a similar level of 100% FC. FC (100%) of the soils was determined through gravimetric method. Required amount was added daily to maintain 30% FC during stress imposition period. At the end of each growth stage, stress was discontinued. From panicle emergence to maturity, 10 grains were harvested from selected panicles of the plants under control and stress treatments at 3 days' intervals. Data on plant height, number of panicles plant^-1, length of panicles, number of grains panicle^-1, 1000-grain weight, yield, TDM and HI were recorded. Finally data were statistically analyzed following SAS programme and regression lines were made through Sigma Plot programme. Student Newman Keuls (SNK) test was performed to compare means.

Source of Information: Bangladesh J. Nuclear Agric. 16&17 : 21-28, 2001

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Grain dry weight of the rice genotypes increased significantly from panicle emergence to 18 days thereafter no increase was observed. But water grain^-1 increased from panicle emergence to 6 days thereafter it gradually decreased to 18 days. After 18 days the decrease in water content was not significant but the rate of decrease was higher than the grain dry matter accumulation. Grain dry matter at different harvests was negatively correlated with water content grain^-1 under control and water stress conditions. Gram dry matter accumulation from panicle emergence to 21 days was positively correlated with gram size at maturity under control and water stress conditions. Binasail showed the best performance under water stress producing the highest TDM, HI and yield compared to other genotypes. G-67 ranked second in respect of stress tolerance.

Knowledge Management: Journal