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Tillering Behavior of Young and Aged Seedling for Short and Long Duration Rice Varieties in Winter Season.

Md. Abdullah-Al-Mahbub
Scientific officer
Plant Physiology Division, BRRI, Gazipur

Dr. Serajul Islam
CSO and Head
Plant Physiology Division, BRRI, Gazipur

Abstract/ Executive Summary:

Tiller number of aged seedling was slightly higher than younger seedling at initial stage up to 35 DAT and younger seedling produced higher tiller than aged seedling up to maturity for BRRI dhan28. In case of BRRI dhan29, the tiller number of all the seedling ages was more or less same up to 42 DAT and then younger seedling produced higher tiller than aged seedling up to maturity. The number of different types of tillers was greatly influenced by seedling age and varietal different was also visible. It found that primary tiller gradually decreased and secondary and tertiary tiller increased gradually with the increased of seedling age for short duration variety like BRRI dhan28. Mother tiller of BRRI dhan28 remained same up to 50 days old seedling but 70 days old seedling, none survived. Mother tiller of aged seedling of short duration variety flowed just after transplanting or sometimes in seedbed and it died thereafter. Contrary, the mother, primary and secondary tiller of long duration variety remained similar up to 70 days old seedling, only the tertiary tiller significantly increased at 70 days old seedling. Relationship was found among tiller type, shoot weight of individual tiller, filled grain/tiller, 100 grain Weight and sterility. Irrespective of variety and seedling age, the shoot weight of variety of tertiary tiller was lower than the other tillers and it was more remarkable when 70 days seedling were transplanted for both the varieties resulted in lower filled spikelet, 100 grain weight and higher percentage of sterility. Grain weight slightly decreased, filled spikelet/tiller significantly decreased and sterility increased significantly with the increase of seedling age for both the varieties. The contribution of different tillers was greatly influenced by seedling age for BRRI dhan28 but it was more or less same in all seedling aged treatments for BRRI dhan29. In case of short duration variety, BRRI dhan28, the contribution of mother and primary tiller gradually decreased, secondary and tertiary tiller gradually increased with the increase of seedling age. In case of BRRI dhan29, the contribution of mother and primary tiller were 10.11% and 47.01% of the total tillers respectively in 30 days old seedling while these values were 0 and 29.16% of the total tillers respectively in 70 days old seedling which were 100% and 38% lower than 30 days old seedling. Grain yield: Grain yield of BRRI dhan28 was also influenced significantly by seedling age in case of BRRI dhan29, it was statistically insignificant up to days old seedling. In case of BRRI dhan28, the highest grain yield (5.79 t/ha) was found in 30 days old seedling and the lowest grain yield (5.01t/ha) was found in 70 days old seedling that was 0.78 ton lower than 30 days old seedling.

Keywords: Rice, Tillering behavior, Short and long duration rice varieties, Winter season,

Location: Plant Physiology Division, BRRI, Gazipur

Start Date: 01-07-2004

End Date: 30-06-2005

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To find out the amount of C and their contribution to grain yield.

Methodology:

The study was conducted at BRRI, Gazipur. Test Variety of this study : BRRI dhan28 and BRRI dhan29. Seedling age: 30, 40 and 70 days. Design: RCB with 3 replications. Method of data collection: Four hills were selected just after transplanting in each treatment for counting different types of tillers. Selected hills observed daily and new tiller when it emerges was ringed by aluminum wire. The selected hills were collected at physiological maturity stage and individual tillers were counted. The contributed of individual tiller and its yield component data were calculated separated. Grains of six sq. meter areas were collected for grain yield adjusted it into ton/ha at 14% moisture content.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2004-2005 (Held on 18-22 December 2005). Bangladesh Rice Research Institute (BRRI). Gazipur -1701.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Regarding the tillering behavior/contribution, 30-50 days old seedling may be use for short duration variety BRRI dhan28 and 30-70 days old may be use for long duration variety like BRRI dhan29. But for getting the highest yield, 30 days old seedling and 50 days old seedling should be used for BRRI dhan28 and BRRI dhan29 respectively.

Knowledge Management: Report/Proceedings