Effects of using light reflecting sheet in high bench culture on yield and quality of strawberry ‘Amaou’
2020
Uto, S. (Fukuoka Agriculture and Forestry Research Center, Chikushino, Fukuoka (Japan)) | Masuda, R. | Saiki, Y. | Sato, K. | Sueyoshi, T. | Miyahara, K. | Goto, D.
In winter, the duration of sunlight is short for the intensive cultivation of strawberries in Fukuoka Prefecture, Japan, and the facilitation of photosynthesis during this time of the year is a significant problem in strawberry production. Therefore, this study investigated the effect of a light reflection sheet under crown heating conditions on the yield and quality of the strawberry cultivar ‘Amaou’ in order to improve the light enviromnent for its intensive cultivation. The photosynthetic rate of ‘Amaou’ leaf surface and leaf back was the same when the light intensity ranged from 0 to 1,000 μmol /square m/s. The installation of a light reflection sheet on the net placed to support the weight of the fruit in an elevated cultivation of ‘Amaou’ resulted in an increase in the reflection of sunlight by approximately 20%, and the irradiation of the underside of leaves by the reflected light led to an improvement of the light environment for strawberry canopies, thus increasing the photosynthetic mass of each individual. As a result, it was clarified that the maturity of the top fruit bunches was shortened and the number of harvested fruit increased, leading to an increase in January to February and the total yield. However, no effect was observed on the sugar content and acidity of the ‘Amaou’ fruit, in spite of the reduced number of days for its maturation. The present apparatus in which the light reflecting sheet is installed in the ball receiving net portion is simple to install and low in cost.
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