efeito do frio e do desponte na brotação de gemas em pessegueiro chilling and tipping off pruning effect on budbreak in peach trees

Clicks: 279
ID: 160400
2009
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Abstract
O objetivo do trabalho foi avaliar a resposta de três cultivares de pessegueiro quanto à brotação de gemas, em ramos com ou sem desponte, quando submetidas a diferentes períodos de exposição ao frio. Ramos de ano das cultivares Coral, Eragil e Rubidoux foram submetidas ao frio complementar (0; 312; 624 e 1.248 unidades de frio). Posteriormente, metade dos ramos foram mantidos inteiros e nos demais efetuou-se o desponte, com a retirada da gema apical. Os ramos foram mantidos em câmara de crescimento a 25ºC, sendo avaliado o percentual de brotação de gemas vegetativas e floríferas aos 15 e 30 dias após início da exposição a 25ºC. O desponte incrementou a brotação de gemas vegetativas em todas as cultivares avaliadas. O efeito do desponte sobre a brotação das gemas vegetativas foi variável conforme as unidades de frio aos quais os ramos foram expostos, sendo evidenciado maior efeito do desponte nos tratamentos com maior exposição ao frio.
The objective of this work was to evaluate the behavior of three peach cultivars in relation to budbreak in branches with or without tipping off pruning submitted to different exposition cold periods. One-year-old branches of Coral, Eragil and Rubidoux peach trees cultivars were submitted to chilling supplement (0, 312, 624 and 1248 cold units). After chilling treatments, half of branches were maintained intact and others were tipped off pruning through terminal bud remove. After this, the branches were kept in growth chamber at 25ºC, and it was evaluated the percentage of budbreak in flower and vegetative buds at 15 and 30 days after the beginning of the exposure at 25ºC. Tipping off pruning increased budbreak in vegetative buds in all cultivars studied. The effect of tipping off pruning on budbreak in vegetative buds was variable depending on chilling intensity that the branches were submitted, being evidenced bigger effect of tipping off pruning in higher chilling exposure.
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hawerroth2009revistaefeito Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Fernando José Hawerroth;José Luiz Petri;Gabriel Berenhauser Leite;Flavio Gilberto Herter;Anderson Carlos Marafon
Journal technocom
Year 2009
DOI
10.1590/S0100-29452009000200018
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452009000200018
Keywords
dormancy chilling requirementplant culture

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