Soybean yield as a consequence of harvest delay and environmental conditions

Authors

  • Rodrigo Yoiti Tsukahara Fundação ABC, Pesquisa e Desenvolvimento Agropecuário, Setor de Agrometeorologia, Rodovia PR‑151, Km 288, Caixa Postal 1003, CEP 84165‑970 Castro, PR, Brasil.
  • Inês Cristina de Batista Fonseca Universidade Estadual de Londrina, Departamento de Agronomia, Campus Universitário, Caixa Postal 6001, CEP 86051‑990 Londrina, PR, Brasil
  • Marcelo Augusto de Aguiar e Silva Universidade Estadual de Londrina, Departamento de Agronomia, Campus Universitário, Caixa Postal 6001, CEP 86051‑990 Londrina, PR, Brasil
  • Edson Giovanni Kochinski Fundação ABC, Pesquisa e Desenvolvimento Agropecuário, Setor de Agrometeorologia, Rodovia PR‑151, Km 288, Caixa Postal 1003, CEP 84165‑970 Castro, PR, Brasil.
  • José Prestes Neto Fundação ABC, Pesquisa e Desenvolvimento Agropecuário, Setor de Agrometeorologia, Rodovia PR‑151, Km 288, Caixa Postal 1003, CEP 84165‑970 Castro, PR, Brasil.
  • Juliana Tamie Suyama Fundação ABC, Pesquisa e Desenvolvimento Agropecuário, Setor de Agrometeorologia, Rodovia PR‑151, Km 288, Caixa Postal 1003, CEP 84165‑970 Castro, PR, Brasil.

DOI:

https://doi.org/10.1590/S1678-3921.pab2016.v51.23379

Keywords:

Glycine max, pre‑harvest, rainfall, solar radiation

Abstract

The objective of this work was to evaluate the effect of harvest delay on grain moisture, thousand grain weight, and soybean productivity, as well as to identify the most important meteorological variables during pre‑harvest and to propose empirical algorithms to estimate soybean yield losses. The experiments were carried out in the municipalities of Castro, in the state of Paraná, and of Itaberá, in the state of São Paulo, Brazil, in the seasons from 2011/2012 to 2013/2014, with the soybean cultivar 'NA5909RG', in seven environments. Treatments consisted of eight harvest times of soybean after phenological stage R8.2. The analysis of group of experiments showed a significant interaction between environments and harvest times. Grain moisture and grain yield are directly affected by the number of days with rainfall equal to or higher than 3 mm. At the R8.2 phenological stage, the highest values of productivity are obtained; however, after this stage, there is a decline of productivity as a consequence of harvest delay. The greatest, accumulated losses of productivity occur in environments with high frequency of rainfall, and high temperature and solar radiation. Two algorithms based on agrometeorological variables are proposed to estimate soybean yield loss.

Author Biography

Rodrigo Yoiti Tsukahara, Fundação ABC, Pesquisa e Desenvolvimento Agropecuário, Setor de Agrometeorologia, Rodovia PR‑151, Km 288, Caixa Postal 1003, CEP 84165‑970 Castro, PR, Brasil.

 

Published

2016-10-04

How to Cite

Tsukahara, R. Y., Fonseca, I. C. de B., e Silva, M. A. de A., Kochinski, E. G., Prestes Neto, J., & Suyama, J. T. (2016). Soybean yield as a consequence of harvest delay and environmental conditions. Pesquisa Agropecuaria Brasileira, 51(8), 905–915. https://doi.org/10.1590/S1678-3921.pab2016.v51.23379

Issue

Section

AGROMETEOROLOGY