Comparison of heat units methods and calendar date in predicting development stages of sunflower crop

Authors

  • Luis Sangoi
  • Paulo Regis Ferreira da Silva

DOI:

https://doi.org/10.1590/S1678-3921.pab1986.v21.14941

Keywords:

temperature degree summations, development stages, helianthus annuus, inflorescence bud differentiation, anthesis

Abstract

The efficiency of three heat units methods and calendar date in predicting development stages of two sunflower cultivars, Contisol and Contisol 711, were evaluated. Heat units methods were more efficient than calendar date in predicting the stages of emergence to inflorescence head differentiation and emergence to beginning of anthesis. Differences were not observed among heat units methods.

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How to Cite

Sangoi, L., & Silva, P. R. F. da. (2014). Comparison of heat units methods and calendar date in predicting development stages of sunflower crop. Pesquisa Agropecuaria Brasileira, 21(9), 901–908. https://doi.org/10.1590/S1678-3921.pab1986.v21.14941

Issue

v.21, n.9, set. 1986

Section

AGROMETEOROLOGY