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首页> 外文期刊>International Journal of Fruit Science >Fruit Set and Berry Weight of Four Rabbiteye Blueberry Cultivars Following Exposure to Sub-Freezing Temperatures During Flowering
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Fruit Set and Berry Weight of Four Rabbiteye Blueberry Cultivars Following Exposure to Sub-Freezing Temperatures During Flowering

机译：开花期间暴露于亚冰冻温度下的四个兔眼蓝莓品种的坐果和浆果重

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摘要

Two spring freezes in Griffin, Georgia during the flowering period in 2008 provided an opportunity to monitor freeze-damage effects on fruit set and fruit weight of four rabbiteye blueberry cultivars under field conditions. Minimum temperatures of −4.2 and −3.5°C occurred on March 9 and March 25, respectively. The estimated dates of 50% open flowers for the cultivars were: Climax, March 23; Alapaha, March 30; Tifblue, April 2, and Ochlockonee, April 10. Initial visual damage estimates (i.e., corolla browning) 3 to 4 days following the last freeze suggested nearly a total crop loss for ‘Climax’ and ‘Alapaha’, and moderate to severe crop loss for ‘Tifblue’ and ‘Ochlockonee’. However, more quantitative estimates of fruit set after counting several thousand flowers and fruit for each cultivar revealed different results than initially anticipated. ‘Climax’ and ‘Tifblue’ did suffer great reductions in fruit set, averaging <8% fruit remaining 6 to 8 weeks after flowering. However, ‘Alapaha’ managed to maintain fruit set of more than 36%, and ‘Ochlockonee’ fruit set was greater than 50%. There were no apparent effects of the freeze on remaining fruit weights. These data indicate that there are differences in fruit set of rabbiteye cultivars following spring freezes during flowering. Hence, growers may want to consider the more cold hardy cultivars in their planting operations if their growing areas are subject to freezes in early to mid-spring.
机译：佐治亚州格里芬（Griffin）在2008年开花期发生了两次春季冻结，这为监测田间条件下对四种兔眼蓝莓品种的坐果和果实重量的冻害影响提供了机会。最低温度分别为3月9日和3月25日达到4.2和3.5摄氏度。估计50％的开花日期为：Climax，3月23日； Climax。 3月30日，阿拉帕哈； Tifblue（4月2日）和Ochlockonee（4月10日）。最初的视觉损害估计（即花冠褐变）在最后一次冻结后的3到4天表明“ Climax”和“ Alapaha”的农作物几乎全部损失，以及“ Tifblue”和“ Ochlockonee”的中度至重度作物损失。但是，对每个品种数以千计的花朵和果实计数后，对坐果的更多定量估计显示出与最初预期不同的结果。 “ Climax”和“ Tifblue”的结实率确实降低了很多，开花后6至8周平均仅剩下8％的果实。但是，“ Alapaha”设法保持了超过36％的坐果率，而“ Ochlockonee”坐果率则超过了50％。冷冻对剩余果重没有明显影响。这些数据表明在开花期间春季冻结之后，兔眼品种的果实结实存在差异。因此，如果种植者的生长区域在早春至中春结冰，则种植者可能希望在种植过程中考虑使用较耐寒的品种。

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  • 来源
    《International Journal of Fruit Science》 |2012年第3期|p.256-260|共5页
  • 作者

    D. Scott Nesmith;

  • 作者单位

    Department of Horticulture, University of Georgia–Griffin Campus, Griffin, Georgia, USA;

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