PLANTING TIME AND DENSITY EFFECTS ON PHENOLOGY, THERMAL INDICES, YIELD AND QUALITY OF POPULAR SMALL-GRAIN AROMATIC RICE (CV. GOBINDABHOG) OF WEST BENGAL

DIBYENDU MAHATA¹*, MRITYUNJAY GHOSH², AMITAVA BHATTACHARYA³, BIKAS CHANDRA PATRA⁴, SOUTI MUKHERJEE^5
1Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
²Professor, Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
³Professor, Department of Agricultural Bio-chemistry, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
⁴Professor, Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
⁵Professor, Department of Post-Harvest Engineering, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
* Corresponding Author : dibyendu.mahata@gmail.com

Received : 05-08-2022     Accepted : 27-08-2022     Published : 30-08-2022
Volume : 14     Issue : 8       Pages : 11586 - 11591
Int J Agr Sci 14.8 (2022):11586-11591

Keywords : Aromatic rice, Planting time, Spacing, Yield, Grain quality
Academic Editor : Ronak Mangroliya, Dr R.S. Umakanth, S.M. Chavan
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to RKVY Project on ‘Bengal Aromatic Rice’ for financial support. Authors are also thankful to Department of Agronomy; Department of Agricultural Bio-chemistry; Department of Post-Harvest Engineering; Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia 741252, West Bengal, India
Author Contribution : All authors equally contributed

The influence of four planting dates [10th July (D10J), 25th July (D25J), 10th August (D10A) and 25th August (D25A)] and three spacings [20 × 10 cm (S20×10), 15 × 15 cm (S15×15), and 20 × 15 cm (S20×15)] on small-grain non-Basmati aromatic rice (cv. Gobindabhog) was studied during kharif season at BCKV, West Bengal. Gobindabhog rice planted on 10 July required 152.0 days to maturity, which was reduced by 8.2, 13.3 and 19.7 days for delayed plantings on D25J, D10A and D25A, respectively. Mean accumulated GDD, HTU and PTU for entire life cycle were 2608ºC day, 15554ºC day hour and 31598ºC day hour. With positive correlations (P<0.01) of GDD, HTU and PTU with number of filled grains/panicle at ripening stage, Gobindabhog rice planted on 25th July produced the highest grain yield (3.02 t/ha), which was 4.1, 14.4 and 17.5% greater over D10A, D25A and D10J plantings, respectively. Planting in second fortnight of July could be adopted for better yield (3.02 t/ha), moderate duration (143.8 days), greater head rice recovery (62.7%) and amylose content (18.1%); while square planting (S15×15, 44 hills/m2) improved grain yield (2.89 t/ha) and aroma (score 2.7) over closer (S20×10, 50 hills/m2) and wider spacing (S20×15, 33 hills/m2)

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