ISHS Acta Horticulturae 326: International Symposium on Pre- and Postharvest Physiology of Pome-fruit
FRUIT SET REGULATION AND QUALITY |
| Authors: | R. Schumacher, W. Stadler |
| Abstract:
The abcission of young apples after fertilization and during fruit fall has as its basis a competition for nutritive substances and assimilation products between the young fruits. The aim of our growers is to bring the trees into a physiological balance. This condition is only reached if there are sufficient non-bearing spurs and the leaves can produce enough assimilation products. The individual shoots with fruit buds do not at first obtain any assimilation products and nutritives substances from the adjoining parts of the tree. A shifting of the assimilation products takes place only gradually inside the tree. With defoliation and thinning experiments we attempted to find out when such transport of assimilation products takes place and to what extent the natural fruit fall, the forming of flower buds and the fruit quality are influenced. | |
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