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Modelling cherry full bloom using 'space-for-time' across climatically diverse growing environments

Citation

Darbyshire, R and Lopez, JN and Song, X and Wenden, B and Close, D, Modelling cherry full bloom using 'space-for-time' across climatically diverse growing environments, Agricultural and Forest Meteorology, 284 Article 107901. ISSN 0168-1923 (2020) [Refereed Article]

Copyright Statement

2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.agrformet.2020.107901

Abstract

A dataset of cherry full bloom dates across the full diversity of Australian growing regions was compiled and utilised for the first time. The primary data source was from growers located across Australia's major cherry growing districts. Records were of varying length and were used to investigate the potential of using data that substitute 'space-for-time' in phenology assessments. Full bloom timing for three cultivars, Bing, Lapins and Van, were collated. The data showed variation in full bloom time across the sites as well as inter-annual variability within sites. This highlighted the potential benefit of a predictive model for growers to better manage the flowering period. The performance of the sequential and the chill overlap models were evaluated using this data. Both models resulted in good statistical representation of the data with RMSE of 3.2 to 5.3 days and 3.3 to 5.4 days for the training and validating data, respectively. The parameterisations of the models differed with the sequential model estimating higher chilling requirement (65-68 CP) than the chill overlap model (46-48 CP). The sequential model estimated similar heat requirements between the cultivars, with Van marginally higher (7250-8000 GDH). The chill overlap model estimated a larger difference in the minimum heat requirement with Van higher (8223 GDH) than Bing and Lapins (6262 and 6486 GDH, respectively). Collation of grower records proved to be a valuable data source which, in the absence of funded programs, could be better utilised for further research that aligns outcomes with industry needs, such as decision support around polliniser varieties, design of growing systems and use of dormancy breakers to synchronise flowering for optimal fruit set and quality.

Item Details

Item Type:Refereed Article
Keywords:Bing, Lapins, Van, full bloom, Australia, cherry, modelling, space-for-time
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Horticultural Crop Growth and Development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Stone Fruit
UTAS Author:Song, X (Miss Xinxin Song)
UTAS Author:Close, D (Professor Dugald Close)
ID Code:137604
Year Published:2020
Deposited By:TIA - Research Institute
Deposited On:2020-02-21
Last Modified:2020-04-16
Downloads:0

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