Soybean morphological and productive characteristics influenced by meteorological parameters and sowing dates

Autores

  • Felipe Schwerz Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;
  • Braulio Otomar Caron Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;
  • Elvis Felipe Elli Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;
  • Velci Queiróz de Souza Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;
  • Douglas Machado de Oliveira Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;
  • Ana Paula Rockenbach Universidade Passo Fundo – UPF, RS;

DOI:

https://doi.org/10.15361/1984-5529.2016v44n2p121-130

Resumo

The aim of this study was to evaluate the influence of meteorological elements on soybean morphological and productive characteristics in five sowing dates. The randomized block design was used in a 5x5 factorial, with the following five sowing dates during the year 2013: the first (10-15), second (10-30), third (11-15), fourth (30-11) and fifth (12-15, 2013), and the following five soybean cultivars: BMX Alvo RR, BMX Veloz RR, CCGL Tec 5721 IPRO, BMX Tornado RR and CCGL Tec 7849 IPRO, with three repetitions. Total dry biomass, leaf area index, plant height, number of pods per plant, number of grains per plant, 1000-grain weight and yield were assessed. According to analysis of variance, significant difference was found for all variables in the cultivar x sowing date interaction. Soybean cultivars morphological and productive characteristics were influenced by meteorological elements and sowing dates. Leaf area index and total dry biomass had the highest means in 11-15 and 11-30, coinciding with the highest grain yield means, obtained for Veloz and Tornado cultivars, respectively. These results were obtained because these sowing dates had the best conditions, with air temperatures between 13.4 and 34.2 °C, accumulated solar radiation of 3074.009 MJ m-2, accumulated thermal time of 1959.15 °C days and total rainfall of 732.8 mm.

 

Additional keywords: Glycine max L.; leaf area index; solar radiation; thermal time; yield.

Biografia do Autor

Felipe Schwerz, Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;

Departamento de Ciências Agronômicas e Ambientais;Área de agrometeorologia e Produção vegetal;

Braulio Otomar Caron, Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;

Departamento de Ciências Agronômicas e Ambientais;

Elvis Felipe Elli, Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;

Departamento de Ciências Agronômicas e Ambientais;

Velci Queiróz de Souza, Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;

Departamento de Ciências Agronômicas e Ambientais;

Douglas Machado de Oliveira, Centro de Educação Superior Norte – RS, Universidade Federal de Santa Maria;

Departamento de Ciências Agronômicas e Ambientais;

Ana Paula Rockenbach, Universidade Passo Fundo – UPF, RS;

Departamento de Ciências Agronômicas e Ambientais;

Publicado

30/03/2016

Edição

Seção

Agrometeorologia - Agrometeorology