Eficiência de uso da radiação e propriedades óticas da cultura do amendoim
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Data
2008-09
Título da Revista
ISSN da Revista
Título de Volume
Editor
João Batista Duarte
Resumo
An experiment was conducted with peanut (Arachis
hypogaea L.), cv. IAC-TATU-ST, in Botucatu, São Paulo State,
Brazil; in the period from 11 February through 03 June 2001. In
all plant development stages, the photosynthetically active
radiation (PAR), the incident PAR, the reflected PAR, and the
transmitted PAR were monitored, as well as the growth and the
weekly phytomass production and the accumulated chemical
energy in the roots, stems, leaves, fruits and seeds. The objective
of the study was to determine the radiation extinction coefficient
(k), the radiation use efficiency (RUE), the radiation conversion
efficiency (RCE), and the crop harvest index (HI). The results
showed that k has been equal to 0.66. Peanuts, at the final stage,
intercepted 628 MJ m-² and absorbed 592 MJ m-² of the PAR,
accumulating 803 g m-² of dry matter and storing 14.8 MJ m-² of
chemical energy with RUE equal to 1.28 g MJ-¹ and RCE equal
to 2.5%. The observed yield was 4.4 t ha-¹ of peanut in pods,
corresponding to 3.3 t ha-¹ of peanut seeds. The HI was equal to
0.58 MJ MJ-¹, in energy basis, and 0.41 g g-¹ in dry matter basis.
Descrição
Palavras-chave
Análise de crescimento, Índice de área foliar, Interceptação da luz, Growth analysis, Leaf area index, Light interception
Citação
ASSUNÇÃO, Hildeu Ferreira da; ESCOBEDO, João Francisco; CARNEIRO, Marco Aurélio Carbone. Eficiência de uso da radiação e propriedades óticas da cultura do amendoim. Pesquisa Agropecuária Tropical, Goiânia, v. 38, n. 3, p. 215-222, jul./set. 2008. Disponível em: <https://www.revistas.ufg.br/pat/article/view/3307/4065>.