ISHS Acta Horticulturae 488: XI International Symposium on Apricot Culture
ESTIMATION OF ‘SUNDROP’ APRICOT FRUIT VOLUME AND FRESH WEIGHT FROM FRUIT DIAMETER |
| Authors: | K. Arzani, S. Lawes, D. Wood |
| Keywords: | Apricot, Prunus armeniaca L. cv. 'Sundrop', Fruit growth, Mathematical model, days after full bloom (dafb), Statistical Analysis System (SAS) |
| Abstract:
Fruit growth is a function of volume (or weight) increase, and diameter by itself is generally a poor measure of fruit growth because it is not linearly related to volume or weight. In experimental work to evaluate changes in fruit growth and size the transformation of non-destructive fruit diameter data to fruit volume is desirable from mature 'Sundrop' trees. Destructive fruit sampling throughout two seasons produced a model to estimate apricot fruit volume and fresh weight from non-destructive fruit diameter data. There were 24 (1990–91) and 32 (1991–92) trees. On each tree two fruit from the middle canopy zone were randomly sampled at weekly intervals from 30 days after full bloom until fruit harvest in both seasons. Fruit diameter, volume, and fresh weight were measured in both seasons. Data was used to build up a model for estimating fruit volume and fruit fresh weight from non-destructive fruit diameter measurements. Strong relationships were observed between fruit diameter, fruit volume and fruit fresh weight in both seasons (r2=0.98). | |
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