BACKGROUND:In the Mediterranean basin, the solar radiation received is very high for many tree species over several hours of the day during the summer. Using a photoselective net can improve the climatic conditions and also modify the quality of light received. OBJECTIVE:This study aimed to evaluate the influence of the colour of photoselective nets on the yield and quality of Actinidia chinensis. MATERIALS:The experiment was carried out in Southern Italy on an orchard of Jintao kiwifruit. Photoselective nets of different colours were used: black, red, yellow, white, and grey. The resulting fruits were compared to those of plants in the open field. A randomised block design was adopted. Environmental, vegetative, and leaf gas exchange parameters; yield; and fruit quality were defined. All data were analysed using the Variance Analysis (ANOVA) and the Principal Component Analysis (PCA). RESULTS:Photoselectivity influenced production. The best results were obtained under the red net in terms of production and fertility indices. Fruit size, maturation indices, and nutraceutical parameters were also higher under the red net. Among the nets, the grey net induced the worst tree productivity results and the worst fruit quality parameters. However, all nets showed better results compared to the open field. CONCLUSION:The photoselective net strongly influenced the yield and quality of Jintao kiwifruit and the better results compared to the open field. The red net proved to be the best performer for the environment where the experiment was carried out.

中文翻译：

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光选择性色网对金桃品种猕猴桃的营养，生产和定性行为的影响

背景：在地中海盆地，夏季一天中的几个小时内，许多树木收到的太阳辐射很高。使用光选择性网可以改善气候条件，也可以改变接收到的光的质量。目的：本研究旨在评估光选择网的颜色对猕猴桃产量和品质的影响。材料：该实验是在意大利南部的金涛猕猴桃果园上进行的。使用了不同颜色的光选择性网：黑色，红色，黄色，白色和灰色。将得到的果实与野外植物的果实进行比较。采用随机区组设计。环境，植物和叶片气体交换参数；让; 和水果的质量被定义。使用方差分析（ANOVA）和主成分分析（PCA）分析所有数据。结果：光选择性影响了生产。在红网下，就产量和生育指数而言，获得了最佳结果。红网下的果实大小，成熟指数和营养参数也更高。在蚊帐中，灰色蚊帐导致最差的树木生产力结果和最差的果实品质参数。但是，与开放领域相比，所有网络都显示出更好的结果。结论：光选择网对金桃猕猴桃的产量和品质有显着影响，与开阔田相比，效果更好。在进行实验的环境中，红色网被证明是性能最好的。在红网下，就产量和生育指数而言，获得了最佳结果。在红色网下，果实大小，成熟指数和营养参数也更高。在蚊帐中，灰色蚊帐导致最差的树木生产力结果和最差的果实品质参数。但是，与开放领域相比，所有网络都显示出更好的结果。结论：光选择网对金桃猕猴桃的产量和品质有显着影响，与开放田相比，效果更好。在进行实验的环境中，红色网被证明是性能最好的。在红网下，就产量和生育指数而言，获得了最佳结果。红网下的果实大小，成熟指数和营养参数也更高。在蚊帐中，灰色蚊帐导致最差的树木生产力结果和最差的果实品质参数。但是，与开放领域相比，所有网络都显示出更好的结果。结论：光选择网对金桃猕猴桃的产量和品质有显着影响，与开阔田相比，效果更好。在进行实验的环境中，红色网被证明是性能最好的。灰色网络导致最差的树木生产力结果和最差的果实品质参数。但是，与开放领域相比，所有网络都显示出更好的结果。结论：光选择网对金桃猕猴桃的产量和品质有显着影响，与开阔田相比，效果更好。在进行实验的环境中，红色网被证明是性能最好的。灰色网络导致最差的树木生产力结果和最差的果实品质参数。但是，与开放领域相比，所有网络都显示出更好的结果。结论：光选择网对金桃猕猴桃的产量和品质有显着影响，与开阔田相比，效果更好。在进行实验的环境中，红色网被证明是性能最好的。