Effect of Shade Screen on Sap Flow, Chlorophyll Fluorescence, NDVI, Plant Growth and Fruit Characteristics of Cultivated Paprika in Greenhouse

Kyeong Ho Kim, Md Rayhan Ahmed Shawon, Jin Hee An, Hyoun Jin Lee, Dong Jae Kwon, In-Chul Hwang, Jong Hyang Bae and Ki Young Choi ()
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Kyeong Ho Kim: Department of Agriculture and Industries, Kangwon National University Graduate School, Chuncheon 24341, Korea
Md Rayhan Ahmed Shawon: Division of Future Agriculture Convergence, Department of Controlled Agriculture, Kangwon National University, Chuncheon 24341, Korea
Jin Hee An: Department of Agriculture and Industries, Kangwon National University Graduate School, Chuncheon 24341, Korea
Hyoun Jin Lee: Department of Agriculture and Industries, Kangwon National University Graduate School, Chuncheon 24341, Korea
Dong Jae Kwon: Catalonix, Director R&D Lab, A-906,114 Beopwonro, Songpa-gu, Seoul 05854, Korea
In-Chul Hwang: Department of Electrical and Electronics Engineering, Kangwon National University, Chuncheon 24341, Korea
Jong Hyang Bae: Department of Horticulture Industry, Wonkang University, Iksan 54538, Korea
Ki Young Choi: Department of Agriculture and Industries, Kangwon National University Graduate School, Chuncheon 24341, Korea

Agriculture, 2022, vol. 12, issue 9, 1-17

Abstract: The aim of this study was to investigate the effect of shade screens on the physiological activity, growth parameters and fruit characteristics of the paprika ( Capsicum annuum L.) plant. Plants were grown in a protected greenhouse and treated under two different shade screens, S1 (single screen) and S2 (double screens; 10% low light intensity compared to S1), during summer at a particular time of the day. The results revealed that the plant height was significantly enlarged by the S2 treatment. However, the number of leaves, leaf fresh weight and leaf dry weight were significantly decreased under S2-treated plants compared to those grown in the S1 treatment. The stem diameter and shoot fresh weight were not significantly different between the treatments. The sap flow and normalized difference vegetation index (NDVI) were higher in S1-treated plants than in those grown in the S2 treatment. The chlorophyll fluorescence fluctuated in both treatments. The fruit fresh weight, number of fruits, fruit pericarp thickness, fruit firmness, fruit volume, sugar content and acidity were significantly higher in S1-treated plants than in S2. Hunter values a and b were significantly higher in S2-treated plants. Moreover, the fruit length and width were not significantly different between the two treatments. The sugar content and acidity of paprika showed a positive correlation. These results suggest that, compared to a double screen for shade in the greenhouse, a single screen is suitable for the growth of paprika plants and enhanced their fruit production.

Keywords: leaf temperature; light intensity; number of leaves; number of fruits; fruit firmness; Hunter value (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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