Apple production accounts for 60–65 % of all fruit production in Hungary, as one of the most important areas of the fruit production sector. Extreme weather conditions in the continental climate can cause significant problems in apple production. The most important solutions to decrease their effects are irrigation and hail net. In addition to protection against hail damage, the hail net has effect on microclimatic factors, its shading effect has a positive effect on the growth of fruit trees and it reduces the risk of sunburn and transpiration. The aim of our research was to evaluate the effect of hail net on the water balance of Early Gold and Golden Reinders microclimatic factors on the basis of thermal imaging, water potential measurement, canopy dry matter content and to analyze the effect on pigment content. The research was carried out on a weekly basis in July and August 2019 at the Horticultural Unit of Pallag, University of Debrecen, Hungary. Based on our results, the air temperature was 2.91 % lower (p = 0.150) and the relative humidity was 3.16 % higher (p = 0.0001) under the hail net. Results also revealed that the foliage temperature was 7.28 % lower (p = 0.006), the water potential value of the foliage was 20.80 % higher (p = 0.399) under the hail net, while the dry matter content of the leaf was 4.76 % lower than in orchards outside the hail net. Canopy chlorophyll concentration was 10.24 % (p = 0.066) higher and carotenoid values were also higher (16.24 %, p = 0.004) in hail net protected circumstances. Based on the results, the hail net has a favorable effect on the water balance of apple orchards and pigment content of apple leaves through microclimatic conditions, partially offsetting the negative effects caused by summer heat and drought stress.

在匈牙利，苹果生产占水果总产量的60-65％，是水果生产领域最重要的领域之一。大陆性气候的极端天气条件可能会给苹果生产造成重大问题。降低灌溉效果的最重要解决方案是灌溉和冰雹网。除防止冰雹破坏外，冰雹网还影响微气候因素，其遮荫作用对果树的生长具有积极作用，并减少了晒伤和蒸腾的风险。我们的研究目的是在热成像，水势测量，冠层干物质含量的基础上，评估冰雹网对早期金和金制拒绝者微气候因子的水平衡的影响，并分析其对色素含量的影响。该研究于2019年7月和2019年8月在匈牙利德布勒森大学Pallag园艺部门每周进行一次。根据我们的结果，在冰雹笼罩下，气温降低了2.91％（p = 0.150），相对湿度升高了3.16％（p = 0.0001）。结果还显示，在冰雹网下，树叶温度降低了7.28％（p = 0.006），树叶的水势值提高了20.80％（p = 0.399），而树叶的干物质含量降低了4.76％比在冰雹网以外的果园里要多。在冰雹网保护的情况下，冠层叶绿素浓度高10.24％（p = 0.066），类胡萝卜素值也高（16.24％，p = 0.004）。根据结果​​，