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Tillering Dynamics, Grain Growth and Yield Performance of Four Rice Varieties

M.T. Islam
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh.

S.E. Akter
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh.

Abstract/ Executive Summary:

Tiller number is the key determinant of rice plant architecture and panicle number and consequently controls grain yield. In today’s crop production systems with high yield outputs, improvement in grain filling has become more challenging than ever before. A field experiment was carried out with four rive varieties viz. Binadhan- 5, Binadhan-8, Binadhan-10 and Binadhan-14 during Boro season 2020-21 at BINA farm, Mymensingh. For grain growth studies, ten spikelets were harvested from the middle of the panicles of three plants of each variety at 3-day intervals starting from fertilization to maturity. Results showed that tillering pattern of all the varieties was similar up to 22 DAT. Binadhan-14 produced the higher number of tillers than Binadhan-5. In the end, Binadhan-8 had a lower number of tillers than other varieties due to its lower number of secondary tillers. Grain dry weight accumulation was the highest in Binadhan-8 followed by Binadhanb-10. Binadhan-5 and Binadhan-8 showed lower grain dry weight accumulation. Grain dry weight was significantly increased up to 24 days thereafter it is not increased significantly. Although all the varieties had some differences in morphological parameters, however, the varieties did not show significant differences in grain yield.

Keywords: Tillering, Grain growth, Yield, Rice

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh.

Start Date: 00-00-2000

End Date: 00-00-2021

Program Area: Variety and Species

Commodity: Rice

Objectives:

To compare tillering and grain growth patterns and yield performance of the rice varieties.

Methodology:

A field experiment was carried out with four rive varieties viz. Binadhan-5, Binadhan-8, Binadhan-10 and Binadhan-14 during Boro season 2020-21 at BINA farm, Mymensingh. The experiments were laid out following a randomized complete block design with three replications having a unit plot size of 4 m × 5 m. Row to row and plant to plant distances were 20 cm and 15 cm, respectively. Recommended doses of fertilizers were applied and cultural practices were done whenever required. Ten spikelets were harvested from the middle of the panicles of three plants of each treatment at a 3-day interval starting from fertilization to maturity. Eight harvests were made from fertilization to maturity at every 3-day interval. Dry weights of those grains were recorded. The grain weight sample was dried at 80^oC for 72 hours. Yield data were harvested when 80% of spikelets attained maturity. Total tillers^-1, effective tiller hill^-1 (number), filled and unfilled grains panicle^-1 (number), 1000-grain weight (g), grain yield, and straw yield hill^-1 (g) were recorded. Data were recorded at harvest from 10 randomly selected plants of each plot and grain yield was taken from the whole plot and converted into ton ha^-1.

Source of Information: Int. J. Sustain. Crop Prod. 16(3):1-4(August 2021)

Article Link (Online Journal): http://ggfjournals.com/e-journals archive

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Binadhan-5, Binadhan-8, Binadhan-10, and Binadhan-14 had some differences in morphological parameters but did not show significant differences in grain yield.

Knowledge Management: Journal