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首页> 外文期刊>Acta Horticulturae >Two experiences of frost damage control in vineyards with selectively extraction of coldest air: Alto Valle, Argentina and Napa Valley, California, USA.
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Two experiences of frost damage control in vineyards with selectively extraction of coldest air: Alto Valle, Argentina and Napa Valley, California, USA.

机译：有选择地抽出最冷空气的葡萄园在霜冻危害控制方面的两种经验：阿根廷的上阿托山谷和美国加利福尼亚的纳帕谷。

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摘要

Temperatures below 0 degrees C during spring is a restrictive factor for the production in temperate zone for fruit species with early budbreak. Temperatures below -2 degrees C during the first grapevine developing leaves, results in a significant loss of yield for that season. The SIS - Selective Inverted Sink - operates during nights with radiation frosts, by selectively extracting the cold air. Due to its higher density, cold air locates in lower layers, closer to the ground and when the SIS extracts the said lower layers this allows the hottest air from the higher layers, to reach the crop. The objective of this research was to evaluate the space and time temperature distribution during radiation frost nights with and without cold air drain by the SIS. The temperature during these nights in low vineyard areas shows the influence of SIS operation. Once the cold air started to be drained the valley temperature initiated to increase to reach high temperatures. The SIS system increased the temperature with 2 degrees C in zones with high frost risk in vineyards of the Napa Valley, California, USA and Alto Valle, Rio Negro, Argentina. The modification of the crop microclimate and the agronomic significance of the increased temperatures is discussed.
机译：春季低于0摄氏度的温度是温带产芽较早的水果品种的限制因素。在第一批葡萄生长的叶子期间，温度低于-2摄氏度，导致该季节的产量显着损失。 SIS-选择性倒置水槽-在夜晚有辐射霜的情况下运行，通过有选择地抽取冷空气来进行。由于其较高的密度，冷空气位于靠近地面的较低层中，并且当SIS提取所述较低层时，这允许来自较高层的最热空气到达农作物。这项研究的目的是通过SIS评估在有霜和无霜的情况下辐射霜冻夜晚的时空温度分布。在低葡萄园地区，这些夜晚的温度显示了SIS运行的影响。一旦开始排出冷空气，谷底温度便开始升高以达到高温。 SIS系统在美国加利福尼亚州纳帕谷和阿根廷里约内格罗的上瓦尔的葡萄园中，将高霜风险区域的温度提高了2摄氏度。讨论了农作物微气候的改变和温度升高的农学意义。

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