Effect of shading on physiology changes and yield of cherry tomatoes in greenhouse
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Abstract
Background and Objective: Nowadays, cherry tomatoes are often grown in greenhouses to minimize the risk of pests and diseases. However, plants grown in a greenhouse might still receive high light intensity. Shading is a way to solve this problem. This experiment aimed to study the effect of shading on the physiology and yield of cherry tomatoes in a greenhouse.
Methodology: The experiment was done by a completely randomized design, with two treatments consisting of non-shading and 10% shading, with 5 replications/treatment. The experiment was conducted in 2 cultivars of cherry tomato ‘Tony TA 104’ and ‘Sweet Boy 1’. Differences between treatments were analyzed by Student’s t-test (P < 0.05).
Main Results: Shading significantly reduced the light saturation and compensation points of cherry tomatoes. Moreover, shading significantly increased the net photosynthetic rate, stomatal conductance, and transpiration rate in cultivar ‘Tony TA 104’, but shading decreased the net photosynthetic rate in ‘Sweet Boy 1’. Shading tended to decrease the fruit weight of ‘Sweet Boy 1’ but did not affect the fruit weight of ‘Tony TA 104’. Additionally, shading tended to increase the lycopene content in ‘Tony TA 104’.
Conclusions: Shading did not affect the total soluble solids and vitamin C content in either cultivar. While shading influenced physiological responses, it did not significantly increase the yield of cherry tomatoes.
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