Variation in the full bloom date of peach tree as a function of endo- and ecodormancy temperatures

a theoretical model

Authors

  • Augusto Carlos Pola Epagri/ Estação Experimental de Urussanga
  • Emílio Della Bruna Epagri - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina
  • Henrique Belmonte Petry Epagri - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina
  • Alexsander Luis Moreto Epagri/ Estação Experimental de Urussanga

DOI:

https://doi.org/10.52945/rac.v36i1.1538

Keywords:

Prunus persica, dormancy, chill hours

Abstract

This study evaluates the influence of thermal variables, before and after the estimated date of ecodormancy onset, on the variation in average full bloom dates (DMPF) of peach trees in Urussanga, Santa Catarina, Brazil. Theoretical endodormancy phase lasted approximately 70 days. Average maximum temperature of the last 30 days of endodormancy and the average of the first 20 days of ecodormancy showed the highest correlations with DMPF, with R = 0.88 (P ≤ 0.01) and R = −0.69 (P ≤ 0.05), respectively. A linear regression model with the maximum temperatures of the theoretical endodormancy phase and the average temperatures of the first 20 days of echodormancy explained 96% of the observed DMPF variations. Temperatures below 16oC in the first 40 days of endodormancy, below 22oC in the last 30 days, and above 13oC in the first 20 days of ecodormancy showed negative correlations with DMPF and together explained 93% of the observed variations. Median temperatures (13ºC to 19oC) in the final endodormancy stage had a greater influence on DMPF anticipation than temperatures below 13oC.

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Author Biographies

Augusto Carlos Pola, Epagri/ Estação Experimental de Urussanga

Graduated in Agronomic Engineering at the Centro de Ciências Agroveterinárias (Lages-SC) in 1984. Master's in Agrometeorology at the Escola Superior de Agronomia "Luiz de Queiroz" in 1987.

He is currently a researcher at Epagri/Estação Experimental de Urussanga, Santa Catarina, Brazil.

Emílio Della Bruna, Epagri - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina

Gratuated in Agronomic Engineering from the Universidade Federal Santa Catarina (1982) and a master's degree in Microbiology from the Universidade Federal de Viçosa (1985). Specialized in public administration by FAAP (Fundação Armando Alvares Penteado). He is currently a scientific researcher at the Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri). He is a technical reviewer for the Revista Brasileira de Fruticultura e Agricultura Catarinense. He has experience in plant genetic improvement in plum, grape and peach crops, in fruit production, producer organization and agribusiness management.

Henrique Belmonte Petry, Epagri - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina

Graduation in Agronomy from the Universidade Federal do Rio Grande do Sul (2009), a Master's in Plant Science from the Universidade Federal do Rio Grande do Sul (2012) and a PhD in Plant Science from the Universidade Federal do Rio Grande do Sul (2014). He is currently a researcher at the Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri), at the Estação Experimental de Urussanga. He currently leads projects in passion fruit cultivation for the State of Santa Catarina.

Alexsander Luis Moreto, Epagri/ Estação Experimental de Urussanga

Agronomist with a PhD in Genetics and Plant Breeding from the Universidade Federal de Lavras, Brazil (2008)
Researcher at the Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri), Brazil.

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Published

2023-04-29

How to Cite

Pola, A. C., Della Bruna, E., Petry, H. B., & Moreto, A. L. (2023). Variation in the full bloom date of peach tree as a function of endo- and ecodormancy temperatures: a theoretical model. Agropecuária Catarinense Journal, 36(1), 81–86. https://doi.org/10.52945/rac.v36i1.1538

Issue

Vol. 36 No. 1 (2023)

Section

Scientific article

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Copyright (c) 2023 Augusto Carlos Pola, Emílio Della Bruna, Henrique Belmonte Petry, Alexsander Luis Moreto

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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