Flower thinning method affects mineral composition of 'Braeburn' and 'Fiesta' apple fruit
| Autor: | R. K. Volz, I. B. Ferguson |
|---|---|
| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | The Journal of Horticultural Science and Biotechnology. 74:452-457 |
| ISSN: | 2380-4084 1462-0316 |
| DOI: | 10.1080/14620316.1999.11511136 |
| Popis: | SummaryFruit mineral concentrations measured at harvest can have major effects on apple fruit quality on the tree or during storage. Orchard practices must therefore seek to optimize fruit mineral composition. The purpose of this study was to describe and elucidate the effects of hand thinning on whole trees and individual spurs on apple fruit mineral composition. Two methods of flower and fruitlet thinning were compared with no thinning on `Braeburn' and `Fiesta' apple trees. Alternate whole flower/fruitlet clusters or all but one flower/fruitlet within every cluster were removed at full bloom or 14±21 d after full bloom. Alternate-cluster thinning reduced final fruit numbers per tree and fruit Ca concentrations by up to 22%, while increasing final fruit size by up to 21%, compared with no thinning. These effects on fruit Ca concentrations were also measured across a range of fruit size classes. Within-cluster thinning at full bloom or up to 21 d after full bloom also reduced fruit numbers per tree but i... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|