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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators.
Autores:  ALVAREZ, R. de C. F.
CRUSCIOL, C. A. C.
NASCENTE, A. S.
RODRIGUES, J. D.
HABERMANN, G.
Data:  2012-12-05
Ano:  2012
Palavras-chave:  Condutância estomática
Arroz
Oryza sativa
Transpiração vegetal
Fotossíntese
Estatura da planta
Gas
Resumo:  The objective of this work was to evaluate gas exchange rates, plant height, yield components, and productivity of upland rice, as affected by type and application time of plant growth regulators. A randomized block design, in a 4x2 factorial arrangement, with four replicates was used. Treatments consisted of three growth regulators (mepiquat chloride, trinexapac.ethyl, and paclobutrazol), besides a control treatment applied at two different phenological stages: early tillering or panicle primordial differentiation. The experiment was performed under sprinkler.irrigated field conditions. Net CO2 assimilation, stomatal conductance, plant transpiration, and water.use efficiency were measured four times in Primavera upland rice cultivar, between booting and milky grain phenophases. Gas exchange rates were neither influenced by growth regulators nor by application time. There was, however, interaction between these factors on the other variables. Application of trinexapac.ethyl at both tillering and differentiation stages reduced plant height and negatively affected yield components and rice productivity. However, paclobutrazol and mepiquat chloride applied at tillering, reduced plant height without affecting rice yield. Mepiquat chloride acted as a growth stimulator when applied at the differentiation stage, and significantly increased plant height, panicle number, and grain yield of upland rice.

2012
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  31705

http://www.alice.cnptia.embrapa.br/handle/doc/941332

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/71475/1/gas.pdf
Editor:  Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 10, p. 1455-1461, out. 2012.
Relação:  Embrapa Arroz e Feijão - Artigo em periódico indexado (ALICE)
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