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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >The influence of growing season on fruit yield and quality of greenhouse melon (Cucumis melo L.) grown in nutrient film technique in a Mediterranean climate
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The influence of growing season on fruit yield and quality of greenhouse melon (Cucumis melo L.) grown in nutrient film technique in a Mediterranean climate

机译：营养季节技术对地中海气候下生长季节对温室瓜果实产量和品质的影响

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摘要

The influence of growing season on some physiological and biochemical variates related to fruit yield and quality was investigated in melon (Cucumis melo L.) plants cultivated in nutrient film technique in a greenhouse located at Pisa, Central Italy, from mid-March to mid-June, or from mid-July to mid-September. Compared with spring, the plants grown in summer exhibited faster growth and development, but produced fewer fruits of larger size and poorer quality due to reduced sucrose content. Growing season did not affect total leaf area, but dry-matter production and partitioning to the fruits was significantly lower in summer than in spring. Summer fruit ripened within 30-35 d after anthesis, about 14 d fewer than in spring. Higher average temperature was presumably responsible for earlier fruit maturation in summer, as in both seasons all melons were harvested after 450-500 degree-days (base temperature of 12 deg C) from anthesis. Fruit swelling did not account for the reduction of sucrose content in summer-grown fruits, which instead was due to shortage of photoassimilate supply and inadequate sucrose synthesis, as suggested by the rate of leaf gas exchange and the activity of sucrose phosphate synthase in the fruit flesh, as determined during the final stages of fruit development. Lower solar radiation was presumably responsible for the reduced leaf carbon assimilation in summer, as growing season did not affect leaf turgor, stomatal conductance, mineral status and chlorophyll content.
机译：从3月中旬到3月中旬，在意大利中部比萨的温室中，采用营养膜技术栽培的甜瓜（Cucumis melo L.）植物，研究了生长季节对某些与果实产量和品质相关的生理和生化变量的影响。 6月，或从7月中旬到9月中旬。与春季相比，夏季生长的植物显示出更快的生长和发育，但是由于减少了蔗糖含量，因此产生了较少的大尺寸果实和较差质量的果实。生长季节不影响总叶面积，但夏季的干物质生产和向果实的分配显着低于春季。花期后30-35 d，夏季果实成熟，比春季少14 d。夏季较高的平均温度可能是导致果实较早成熟的原因，因为在两个季节中，所有甜瓜都在花后450至500度日（基温12摄氏度）后收获。水果膨大并不能说明夏季种植的水果中蔗糖含量的减少，这是由于光同化供应不足和蔗糖合成不足所致，正如叶片气体交换速率和水果中蔗糖磷酸合酶活性所表明的那样。果肉，在果实发育的最后阶段确定。夏季较低的太阳辐射可能是导致叶片碳同化减少的原因，因为生长季节不影响叶片的膨大，气孔导度，矿物质状态和叶绿素含量。

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