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Optimization of seedling density as influenced by seed rate for mechanical transplanting

Hossen, M.A., Hossain, M.M., Haque, M.E., Bell, R.W. and Rahman, M.A. (2014) Optimization of seedling density as influenced by seed rate for mechanical transplanting. In: Proceedings of the conference on conservation agriculture for smallholders in Asia and Africa, 7 - 11 December, Mymensingh, Bangladesh pp. 48-49.

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Mechanization of rice cultivation, including transplanting, is spreading in Bangladesh in order to reduce the cost of production, the need for labour and to increase productivity of rice cultivation. Quality seedlings are a key factor for the success of mechanical rice transplanting. Seeding density in the seedling tray has considerable influence on seedling quality, and hence on plant establishment and the percentage of missing hills in the field after transplanting. There are combined effects of seedling adjustment options of the rice transplanter and seedling density on number of plants per hills and percentage of missing hills. Rice grain size and shape in terms of length, breadth and length-breath ratio differs among rice varieties. Based on size and shape, rice grain can be classified as bold, medium and slender, long and extra long (Belsnio, 1992). This study, conducted during the irrigated dry season of 2013-14, aimed to identify the optimum seed rate for quality seedlings production to minimize the percentage of missing hills. In addition, suitable seedling adjustment option of the rice transplanter for different seedling densities were identified to maintain optimum numbers of seedlings per stock (plants/hill) by the rotary picker of the transplanter.

Publication Type: Conference Paper
Murdoch Affiliation: School of Veterinary and Life Sciences
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