Heat requeriment for inducing budbreaking in different apple cultivars

Authors

  • Gilberto Luiz Putti Epagri/Estação Experimental de Caçador
    • José Luiz Petri Epagri/Estação Experimental de Caçador
      • Marta Helena Mendez UFPel, Instituto de Biologia
        • Gabriel Berenhauser Leite Epagri/Estação Experimental de Caçador

          DOI:

          https://doi.org/10.52945/rac.v19i2.934

          Keywords:

          Malus domestica, termic requirements, chilling requirements, bud breaking

          Abstract

          The heat requirements for bud burst of six apple cultivars were evaluated. Shoots with 20 to 25cm
          length were submitted to 1,150 cold units. After this treatment, shoots were divided in single bud cuttings and treated at different temperatures (5, 10, 15, 20 and 25oC). The mean time of budbreak (MTB), development index, base temperature and degree-days for budbreak for each cultivar was calculated. The increase of temperature after chilling reduced the MTB in all cultivars. The base temperature to calculate the degree-days varied among cultivars, but has not relation with chilling requirement. The development index improves with temperature increase. The heat requirement is stable at temperatures between 10 and 25oC. The heat requirement is independent of the chilling requirement.

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          Published

          2006-05-27

          Issue

          Vol. 19 No. 2 (2006)

          Section

          Scientific article

          License

          Copyright (c) 2006 Agropecuaria catarinense

          Creative Commons License

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

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          How to Cite

          Heat requeriment for inducing budbreaking in different apple cultivars. (2006). Agropecuária Catarinense Journal, 19(2), 71-74. https://doi.org/10.52945/rac.v19i2.934