2019 Volume 12 Issue 1 Pages 8-15
We used an infrared light shading net to lessen any high-temperature damage such as to the fruit quality in passion fruit. The effects of several shading levels on vine growth and fruit quality of passion fruit were investigated. Shading treatments lowered the air temperature and leaf-surface temperature. Under low shading (shading level of about 30%), there was no influence growth on but the highest sugar/acid ratio of juice was observed among all treatments. However, middle shading (shading level of about 40%) resulted in a shade-avoidance syndrome on the vine, which under heavy shading (shading level of about 60%), the leaves showed that shade leaf and flowering was inhibited. Furthermore, delay of the maturation of fruit, fruitlets, and low sugar/acid ratio of juice were observed, indicating that a shading level of about 30% was optimal for shading; increasing the photosynthetic rate and improving the fruit quality of passion fruit.
