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2024 Vol.57, Issue 2 Preview Page

Short communication

Growth response of mini-paprika ‘Raon red’ to different EC levels of supply nutrient solution in hydroponics using coir substrates
Seong-Tae Choi1*
,
Bokyung Park1
,
Seo-Hyeon Lee1
,
Chul Geon An2
,
Hae-Suk Yoon1
1Department of Horticulture Research, Gyeongsangnam-do Agricultural Research and Extension services, Jinju 52733, Korea
2Medicinal Resources Research Institute, Gyeongsangnam-do Agricultural Research and Extension Services, Hamyang 50005, Korea
*Corresponding Author
31 May 2024. pp. 118-123
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Abstract

Mini-paprika ‘Raon red’ has been steadily consumed due to its good taste of the fresh fruit since released from Gyeongsangnam-do in 2016. ‘Raon red’ paprika plant is characterized by better fruit set with smaller leaves and thinner stem than common blocky paprika, but EC management of the nutrient solution has not yet been established in the hydroponics. This study was conducted to clarify the supply EC level suitable for ‘Raon red’ through comparing with the EC (control) recommended for blocky paprika. For the control group, EC of the nutrient solution was adjusted to 3.0 dS m-1 from Feb. 27 to April 30 (the first growing period) and 2.8 dS m-1 from May 1 to July 17 (the second growing period) after planting the plants on February 6. For the two experimental groups, -0.4 EC and -0.8 EC, plants were supplied with 0.4 and 0.8 dS m-1 lower nutrient solutions, respectively, than the control EC during the two growing periods. There was no consistent changes or significant differences in growth, yield, fruit weight, and occurrence of blossom-end rot of the plants depending on different EC levels of the supply nutrient solution. Although not significant, soluble solids of fruits decreased by 0.3°Brix to 1.0°Brix in the lower EC treatments. These results confirmed that EC control can affect the quality of fruit, therefore, additional research is needed to set the appropriate EC standards considering the quality of mini-paprika ‘Raon red’.

Yield and fruit characteristics of mini-paprika ‘Raon red’ by EC treatments of supply nutrient solution.
Treatment Yield (kg 10a-1) Fruit
Avg. weight (g) Soluble solids (°Brix) Blossom-end rot (%)
Control1 2,630 ± 2492 n.s.3 59.2 ± 4.0 n.s. 10.2 ± 0.2 n.s. 1.6 ± 0.9 n.s.
-0.4 EC 2,693 ± 70 59.5 ± 4.6 9.9 ± 0.5 0.7 ± 0.5
-0.8 EC 2,663 ± 240 60.5 ± 2.6 9.2 ± 0.6 1.7 ± 1.2

1Control was EC generally recommended for common blocky paprika.

2Values are mean ± SD.

3Not significant by LSD at P = 0.05.

Keywords
Electrical conductivity
Fertilizer
Soluble solids
Sweet pepper
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Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 57
  • No :2
  • Pages :118-123
  • Received Date : 2024-04-02
  • Revised Date : 2024-05-23
  • Accepted Date : 2024-05-28
  • DOI :https://doi.org/10.7745/KJSSF.2024.57.2.118
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