Componentes produtivos do trigo afetados pela densidade de semeadura e aplicação de regulador vegetal

Imagem de Miniatura

Data

2014-01-01

Título da Revista

ISSN da Revista

Título de Volume

Editor

Univ Estadual Londrina

Resumo

Improvement on yield potential of plants by crop management is the main research challenge due to the growing of food demand worldwide. The objective of this work was to study physiological and morphological traits and its relationship with yield components and yield of wheat as affected by sowing densities and plant growth regulators. The experimental design was a split-plot design with four replications. The plots were consisted by four sowing densities ( 30, 50 70 and 90 plants m(-1)) and the subplots were consisted by plant growth regulators [control, (IBA+GA+KT), Trinexapac-Ethyl e (IBA+GA+KT) + Trinexapac-Ethyl]. Dry matter accumulation, plant height, source-sink distance, gas exchange and yield were determined. Trinexapac-Ethyl application resulted in decreasing of plant height, source-sink distance and flag leaf length; however, the grain yield was not affected. The number of plants per unit area affected dry matter accumulation. Higher dry matter accumulation showed direct relationship with yield and yield components in lower plant densities.

Descrição

Palavras-chave

Triticum aestivum L., tillering, dry matter accumulation, flag leaf, IBA plus GA plus KT, Trinexapac-Ethyl

Como citar

Semina-ciencias Agrarias. Londrina: Univ Estadual Londrina, v. 35, n. 1, p. 39-53, 2014.