Agronomic performance of lowland rice (Oryza sativa L.) PSB Rc82 under different nursery management and seedling age at transplanting

Abstract

Nursery management and age of seedlings at transplanting affects growth and yield of lowland rice. A field experiment was conducted at the experimental area of the Department of Agronomy, Visayas State University, Baybay, Leyte to: (1) evaluate effects of nursery management and seedling age on the growth and yield of lowland rice PSB Rc82; (2) determine the appropriate nursery management and seedling age for optimum yield; and (3) evaluate the profitability of PSB Rc82 production under different nursery management and seedling age. Different nursery management were designated as the mainplot and age of seedlings as the subplot. Wetbed method of nursery management, irrespective of seedling age resulted in earlier heading and maturity, higher crop growth rate at 21-42 DAT, more filled spikelets and consequently higher grain yield (2.18 t ha-1). Using 25 -day old seedlings at transplanting resulted in earlier heading and maturity, higher harvest index and net assimilation rate at 21-42 DAT. Older seedlings gave more filled grains per panicle resulting in higher grain yield than younger seedlings. Thus, this study recommends 25-day old seedlings at transplanting under wetbed method for PSB Rc82 lowland rice production.

Keywords

• crop growth rate,dapog method,harvest index,net assimilation rate,wetbed method

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