MODELS TO ESTIMATE CHILLING ACCUMULATION UNDER SUBTROPICAL CLIMATIC CONDITIONS IN BRAZIL

Autores

  • Chaiane Goveia Milech Universidade Federal de Pelotas
  • Silvia Scariotto Embrapa Clima Temperado
  • Maximiliano Dini Universidade Federal de Pelotas http://orcid.org/0000-0003-1118-7803
  • Flavio Gilberto Herter Universidade Federal de Pelotas
  • Maria do Carmo Bassols Raseira Embrapa Clima Temperado

DOI:

https://doi.org/10.5380/abclima.v23i0.53086

Palavras-chave:

chilling accumulation, dormancy, temperate fruits.

Resumo

Chilling requirement is a characteristic that limits temperate fruit crops cultivation under subtropical climate. Several mathematic models, differing on the relative value of chilling units have been developed, in order to estimate the chilling accumulation on a given site. The present work compared eight of these models using data from hourly temperatures from May to August, from a period of 11 years, collected in Pelotas, RS, Brazil, aiming to characterize the region regarding the chilling accumulation for the cultivation of deciduous fruit trees and it also had as objective to check if a model using average temperatures is suitable enough to be used when hourly temperatures were not available. The eight tested models were: Chilling Hours (≤7.2°C); Chilling Hours (≤11°C); Utah; Low Chill; Dynamic; Mean Temperatures; Positive Utah and Taiwan. The results showed large differences between years, regardless of the used model. However, the Taiwan and Low Chill models seemed more suitable for the estimation of the accumulation of cold in the Pelotas region. The Medium Temperatures model can be used as a valid option since it has a high correlation with the other models and easy data availability.

Biografia do Autor

Chaiane Goveia Milech, Universidade Federal de Pelotas

Bióloga, Mestra em Agronomia, Fruticultura de Clima Temperado (Programa de Pós-Graduação em Agronomia/PPGA, Universidade Federal de Pelotas/UFPel, Pelotas, RS, Brasil), Doutoranda em Agronomia, Fruticultura de Clima Temperado (PPGA, UFPel, Pelotas, RS, Brasil).

Silvia Scariotto, Embrapa Clima Temperado

Doutora em Ciências, Pósdoutoranda em Embrapa Clima Temperado, Pelotas, RS.

Maximiliano Dini, Universidade Federal de Pelotas

Engenheiro Agrônomo (Universidad de la República, Montevideo, Uruguai), uruguaio, Pesquisador Assistente do INIA Las Brujas, Mestre em Agronomia, Fruticultura de Clima Temperado (Programa de Pós-Graduação em Agronomia/PPGA, Universidade Federal de Pelotas/UFPel, Pelotas, RS, Brasil), Doutorando em Agronomia, Fitomelhoramento (PPGA, UFPel, Pelotas, RS, Brasil).

Flavio Gilberto Herter, Universidade Federal de Pelotas

PhD of Plant Physiology, Professor do Programa de Pós-Graduação em Agronomia/PPGA, Universidade Federal de Pelotas/UFPel, Pelotas, RS. Pesquisador aposentado da Embrapa Clima Temperado, Pelotas, RS.

Maria do Carmo Bassols Raseira, Embrapa Clima Temperado

PhD of Plant Science, Pesquisadora da Embrapa Clima Tempeardo, Pelotas, RS.

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Publicado

2018-09-12

Como Citar

Milech, C. G., Scariotto, S., Dini, M., Herter, F. G., & Raseira, M. do C. B. (2018). MODELS TO ESTIMATE CHILLING ACCUMULATION UNDER SUBTROPICAL CLIMATIC CONDITIONS IN BRAZIL. Revista Brasileira De Climatologia, 23. https://doi.org/10.5380/abclima.v23i0.53086

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