HARVEST TIME AND PHYSIOLOGIC QUALITY OF SEEDS IN IRRIGATED RICE (Oryza sativa cv. BRS RORAIMA)

Authors

  • Oscar José Smiderle
  • Carlos Tadeu dos Santos Dias Esalq-USP

Keywords:

Physiologic quality, whole grain, humidity

Abstract

Harvest time is one of most important factors influencing rice seed characteristics for purpose of either planting or milling. With the objective to determine a proper harvesting  time, irrigated rice seeds of cultivar BRS Roraima were harvested at 15, 22, 29, 36, 43 and 50 days after flowering (DAF), and assessed according to humidity, viability, dry mass of 1,000 seeds, whole grain yield, productivity and storability. Seeds harvested 29 DAF showed high quality and its productivity was equivalent to the subsequent periods. Seeds harvested 50 DAF showed good performance, except for whole grain yield. Harvests 15 and 22 DAF were unsuitable, reducing the physiologic quality of seeds, mill efficiency and high initial humidity. The adequate harvest time for cultivar BRS Roraima is between 29 and 43 DAF, when seeds present higher yield, dry mass, whole grain yield, physiologic quality and storability.

KEY-WORDS: Physiologic quality; whole grain; humidity.

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Author Biographies

Oscar José Smiderle

[1] Eng.Agr.DSc. Pesquisador Embrapa Roraima. CP 133 CEP 69301-970. Boa Vista RR. e-mail: ojsmider@cpafrr.embrapa.br

Carlos Tadeu dos Santos Dias, Esalq-USP

Professor da Escola Superior de Agricultura Luiz de Queiroz - USP

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Published

2008-09-24

How to Cite

SMIDERLE, O. J.; DIAS, C. T. dos S. HARVEST TIME AND PHYSIOLOGIC QUALITY OF SEEDS IN IRRIGATED RICE (Oryza sativa cv. BRS RORAIMA). Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 38, n. 3, p. 188–194, 2008. Disponível em: https://revistas.ufg.br/pat/article/view/3487. Acesso em: 5 jan. 2025.

Issue

v. 38, n. 3, Jul./Sep. 2008

Section

Research Article

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