Comparison of methods for estimation of chilling and heat requirements of nectarine and peach genotypes for flowering

Maulión, Evangelina; Valentini, Gabriel Hugo; Kovalevski, Leandro; Prunello, Marcos; Monti, Laura; Daorden, Maria Elena; Quaglino, Marta Beatriz; Cervigni, Gerardo Domingo Lucio

doi:10.1016/j.scienta.2014.07.042

Cited by 40 publications

(22 citation statements)

References 26 publications

(30 reference statements)

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“…For the chill phase, we used the Dynamic Model because of the higher credibility of projections with this model (Luedeling et al, 2011;Darbyshire et al, 2013). Some other models also perform reasonably well (Luedeling et al, 2011) -or even better in non Mediterranean areas (Maulión et al, 2014) -in reproducing observed flowering patterns, but their suitability for climate change projections has been questioned (Luedeling, 2012). Although Darbyshire et al (2013Darbyshire et al ( , 2014,) suggested that the sequential modeling may need improvement, especially in the context of climate projections, and they advocated for more field and laboratory work to validate and define in a better way both chilling and forcing procedures, they also noted that the sequential model composed by the Dynamic chilling model and GDH growth model dominated the best performing models across all the data series in their study.…”

Section: Discussionmentioning

confidence: 99%

Future climate change impacts on apple flowering date in a Mediterranean subbasin

Funes

Aranda

Biel

et al. 2016

Agricultural Water Management

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Section: Discussionmentioning

confidence: 99%

Future climate change impacts on apple flowering date in a Mediterranean subbasin

Funes

Aranda

Biel

et al. 2016

Agricultural Water Management

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“…According to the Low Chill model the mean was 1453 CU for these 11 years. In a study comparing models of cold accumulation, Maulión et al (2014) indicated that the coefficient of variation allows a comparison between the models, assuming that the model most appropriate for a given region should reflect the climatic conditions that occur, with less variation between years and an ability to predict more safely the amount of cold accumulated. The authors tested four models (Chilling Hours, Utah, Positive Utah and Dynamic model), concluding that the most suitable ones were the Chilling Hours (≤7.2°C) and positive Utah models.…”

Section: Resultsmentioning

confidence: 99%

Models to Estimate Chilling Accumulation Under Subtropical Climatic Conditions in Brazil

Milech

Scariotto

Dini

et al. 2018

ABClima

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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.

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“…Essa variabilidade é inerente a variação anual da temperatura do ar, além da atuação dos sistemas meteorológicos predominantes na região, principalmente a entrada de frentes frias, as quais adentram no sul do estado e causam queda brusca nas temperaturas (COSTA; ANDRADE, 2015;FRITZSONS et al, 2008). No entanto, a variabilidade interanual do somatório de frio é prejudicial ao estabelecimento das frutíferas de clima temperado, dificultando a escolha das cultivares para cada região; nos anos de menor acúmulo de frio a brotação e o florescimento podem ser prejudicados e, consequentemente, pode ocorrer redução na produtividade (TANASIJEVIC et al, 2014) e dificuldade de escolha das cultivares com melhor adaptação (MORAIS;CARBONIERI, 2015;MAULIÓN et al, 2014 Médias seguidas pela mesma letra minúscula na linha, não diferem pelo teste Tukey a 5%.…”

Section: Resultsunclassified

Avaliação De Métodos De Estimativa De Número De Horas Frio Para O Sul E Sudoeste Do Paraná

Santos¹,

Leite²,

Martins³

2017

ABClima

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RESUMO:As frutíferas de clima temperado necessitam acumular horas de frio para sair da dormência e iniciar a floração. Essas frutíferas são importantes para o Paraná; que é o quarto estado com maior produção. Por isso, o objetivo desse trabalho é avaliar o desempenho de quatro métodos de estimativa de número de horas de frio (NHF) para as cidades Fernandes Pinheiro, Francisco Beltrão, Guarapuava, Palmas, Pato Branco e Planalto; localizadas na região sul e sudoeste do Paraná relativo ao período de 1980 a 2014. Para selecionar o melhor método de NHF foi realizada a análise de variância, seguida de comparação de médias, pelo teste Tukey (α=0,05), além da correlação (r), raiz do quadrado médio do erro (RQME) e BIAS. Para todas as cidades, o método de Pola e Angelocci foi o mais eficiente em estimar o número de horas de frio para a região estudada, com menores valores de RQME, entre 26,4 a 46,4 horas. O método de Carbone e Schwartz foi o que apresentou os piores resultados em todas as cidades. Palavras-chaves: necessidade de frio, frutíferas de clima temperado, frio de inverno. CHILLING HOURS PERFORMANCE METHODS FOR THE SOUTH AND SOUTHWEST OF PARANÁ STATEABSTRACT: Many temperate fruit require cold temperatures during the dormancy season to initiate flowering and bear fruit. These fruits are important to the Paraná state; which is the fourth most important in the production of this crop. The aim of this study is to evaluate the performance of four chilling hours methods for Fernandes Pinheiro, Francisco Beltrão, Guarapuava, Palmas, Pato Branco and Planalto; located at south and southwest of Paraná, for the period 1980 to 2014. To verify the performance of four methods, the accumulated chilling hours were submitted to analysis of variance followed by Tukey test (α=0.05), Pearson correlation (r), root mean square error (RMSE) and BIAS. The Pola and Angelocci method estimations performed better, with lower RMSE values, 26.4 to 46.4 hours. The Carbone and Schwartz method was the worst chilling hours estimated.

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Comparison of methods for estimation of chilling and heat requirements of nectarine and peach genotypes for flowering

Cited by 40 publications

References 26 publications

Future climate change impacts on apple flowering date in a Mediterranean subbasin

Future climate change impacts on apple flowering date in a Mediterranean subbasin

Models to Estimate Chilling Accumulation Under Subtropical Climatic Conditions in Brazil

Avaliação De Métodos De Estimativa De Número De Horas Frio Para O Sul E Sudoeste Do Paraná

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