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

Samuel Luiz Fioreze; João Domingos Rodrigues

doi:10.5433/1679-0359.2014v35n1p39

Yield components in wheat affected by sowing density and growth regulators

Authors

Samuel Luiz Fioreze Universidade Federal de Santa Catarina
João Domingos Rodrigues Universidade Estadual Paulista Júlio de Mesquita Filho

DOI:

https://doi.org/10.5433/1679-0359.2014v35n1p39

Keywords:

Triticum aestivum L., Tillering, Dry matter accumulation, Flag leaf, IBA GA KT, Trinexapac-Ethyl.

Abstract

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.

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Author Biographies

Samuel Luiz Fioreze, Universidade Federal de Santa Catarina

Engº Agrº, Prof. Auxiliar, Universidade Federal de Santa Catarina, UFSC, Deptº de Ciências Agronômicas, Curso de Agronomia, Curitibanos, SC.

João Domingos Rodrigues, Universidade Estadual Paulista Júlio de Mesquita Filho

Engº Agrº, Prof. Titular, Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Deptº de Botânica, Instituto de Biociências. Distrito de Rubião Júnior, Botucatu, SP.

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Published

2014-02-26

How to Cite

Fioreze, S. L., & Rodrigues, J. D. (2014). Yield components in wheat affected by sowing density and growth regulators. Semina: Ciências Agrárias, 35(1), 39–54. https://doi.org/10.5433/1679-0359.2014v35n1p39

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Issue

Vol. 35 No. 1 (2014)

Section

Articles

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