ISHS Acta Horticulturae 276: II International Symposium on Computer Modelling in Fruit Research and Orchard Management
COMPUTER SIMULATION OF THE CARBOHYDRATE ECONOMY OF PEACH CROP GROWTH |
| Authors: | T.M. DeJong, R.S. Johnson, S.P. Castagnoli |
| Abstract:
A peach crop production computer simulation model is described and field validation data are presented. The simulation model contains two submodels, one for estimating daily peach fruit growth potential and photosynthate demand and the other for estimating daily photosynthate availability for fruit growth. Field validation of the model consisted of adjusting the fruit growth submodel for early, mid-season and late clingstone peach cultivars (cvs. Carson, Andross and Starn, respectively) using field data from early-thinned trees with minimal crop load. We then tested the ability of the model to predict fruit growth and yield of grower managed trees. The model predicted the seasonal pattern of fruit growth and final yield of the early cultivar (Carson) very well, not quite as well for the mid-season cultivar (Andross) and poorly for the late cultivar (Starn). The data indicates that the overall concept of the model appears to be functional, however more specific information is needed concerning the fruit growth characteristics of late season cultivars and canopy photosynthesis. | |
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