Journal article

Using several flowering phenology models to statistically determine 'Cripps Pink' apple chilling requirement

R Darbyshire, I Goodwin, KS Pope, E Costes (ed.)

X INTERNATIONAL SYMPOSIUM ON MODELLING IN FRUIT RESEARCH AND ORCHARD MANAGEMENT | INT SOC HORTICULTURAL SCIENCE | Published : 2017

Abstract

Accumulation of sufficient winter chill under anthropogenic climate change may be a constraint for the future production of fruit and nut crops. To evaluate potential impacts and to implement adaptation strategies, reliable estimates of varietal chilling requirements (CR) are needed. Often CRs are estimated statistically as parameters in flowering phenology models. As such, estimated CR may differ depending on model or analysis choice. To test this, historical records of flowering phenology for 'Cripps Pink' apple were obtained from growing districts across southern Australia. These data were used to estimate CR via the sequential model, partial least squares (PLS) regression and the chill o..

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