Seed Quality of Transplanted Aman Rice as Impacted by Rainfed in the Ripening Phase

M. R. Manir *

Farm Management Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

K. P. Halder

Farm Management Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

M. S. Islam

Farm Management Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

M. M. Rashid

Farm Management Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

S. Begum

Farm Management Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

E. Hossain

Administrative Division, Bangladesh Rice Research Institute (BRRI), Gazipur-1701, Bangladesh.

*Author to whom correspondence should be addressed.


Abstract

Rainfall is the main contributor to provide soil moisture for rainfed rice (Transplanted Aman) cultivation. The aim of the study was to investigate the seed quality of different transplanted Aman rice cultivars that are influenced by rainfed during ripening phases. For this, several experiments have been performed during the transplanted Aman season of 2014, 2015, and 2016 at the Bangladesh Rice Research Institute, Gazipur. Two planting dates and three rice varieties were used in the treatment, and the treatments were organized in a randomized complete block design with three replications. T. Aman rice received huge rainfall up to vegetative phage resulting no irrigation demand in all three tested years. In all the parameters of yield and yield components, the association between planting dates and variety was not significant. Also the relationship between planting dates and variety did not greatly affect the germination percentage, seedling vigor index, high density grain shoot dry weight, and root dry weight. Sixteen august planting produced a greater number of tillers m-2, panicles m-2, grain panicle-1, 1000-grain weight, grain and straw yield in the case of yield and yield components. While, the 1000-grain weight of panicles m-2, grain panicle-1, was greatly influenced by the variety. The highest 1000 grain weight and grain yield were produced by BRRI dhan46. The SVI, HDG percent, SDW and RDW were greatly influenced by planting dates in terms of seed quality. All of these criteria were higher for planting on 16 August than for planting on 12 September. Early transplanting received more rainfall in reproductive phase than late planting. Varieties were greatly influenced by all the seed quality parameters. BRRI dhan46 received the highest GM percent, SVI, HDG percent, SDW and RDW. Specific suitable transplanting dates were selected considering minimum irrigation at reproductive phage and maximun seed quality and grain yield. Delay in transplanting demanded more irrigation and reduced seed quality and grain yield.

Keywords: Rice, seed quality, rainfed, ripening phase


How to Cite

Manir, M. R., Halder, K. P., Islam, M. S., Rashid, M. M., Begum, S., & Hossain, E. (2022). Seed Quality of Transplanted Aman Rice as Impacted by Rainfed in the Ripening Phase. Asian Journal of Advances in Agricultural Research, 20(4), 1–9. https://doi.org/10.9734/ajaar/2022/v20i4402

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