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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >The effects of leaf removal and of modifying temperature set-points with solar radiation on tomato yields
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The effects of leaf removal and of modifying temperature set-points with solar radiation on tomato yields

机译：脱叶和利用太阳辐射改变温度设定点对番茄产量的影响

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摘要

An experiment was conducted to assess whether the severity of leaf removal or modifying night temperature set-points based upon the amount of solar radiation intercepted the previous day could affect tomato yields. A night temperature set-point of 16degC increasing linearly by 3 K for every 1000 klx h (_67 mol m-2 d-1) was compared with a 19degC set-point which decreased by 5 K for every 1000 klx h. Similar mean diurnal temperatures were achieved in these two regimens and consequently there was littleeffect on the pattern of yield or cumulative yields for the whole season. When leaves were removed every week up to two trusses above the ripening truss (high leaf removal: HLR), fruits were warmer during the day and cooler at night, and ripened 1.2 daysearlier than those on plants where leaves were removed up to two trusses below the ripening truss (low leaf removal: LLR). The leaf removal treatments had a similar pattern of yield and there was no significant difference in the cumulative yields for the season. This was despite the fact that the HLR plants probably had only 50% of the leaf area of LLR plants. This lack of response was primarily attributed to the poor light penetration in the canopy, which meant that lower leaves contributed little tothe net canopy photosynthesis. The effects of leaf removal on fruit quality and water usage are presented and discussed in relation to the best leaf removal strategy to use for commercial tomato production.
机译：进行了一项实验，以根据前一天截获的太阳辐射量评估除叶的严重性或修改夜间温度设定点是否会影响番茄的产量。将夜间温度设定点16degC每1000 klx h（_67 mol m-2 d-1）线性增加3 K，将19℃设定点每1000 klx h降低5K。在这两种方案中，日平均温度都达到了相似的水平，因此对整个季节的产量模式或累计产量几乎没有影响。每周从成熟的桁架上方移出最多两个桁架的叶片（高叶片去除率：HLR）时，白天的果实较温暖，夜晚则凉爽，并且比除去以下最多两个桁架的植物的果实早1.2天成熟成熟的桁架（低叶去除率：LLR）。除叶处理具有相似的产量模式，该季节的累计产量没有显着差异。尽管事实是，HLR植物可能仅占LLR植物叶片面积的50％。这种缺乏响应的主要原因是冠层的光穿透性差，这意味着较低的叶片对冠层的净光合作用几乎没有贡献。介绍并讨论了脱叶对水果质量和用水的影响，并讨论了用于商业番茄生产的最佳脱叶策略。

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