Supply electrical conductivity (EC) concentration of the nutrition solution is an important factor in the absorption of nutrients by plants and the management of the root zone, as it can control the vegetative/reproductive growth of a plant. Paprika usually undergoes its reproductive and vegetative growth simultaneously. Therefore, ensuring proper growth of the plant leads to increased yield of paprika. In this study, growth characteristics of paprika were examined according to the EC concentration of a coir and a rockwool substrate. The supply EC was 1.0, 2.0, and 4.0 mS·cm-1 applied at the initial stages of the growth using the rockwool (commonly used by paprika farmers) and the coir substrate with a chip and dust ratio of 50:50 and 70:30. For up to 16 weeks of paprika growth, EC concentrations of 1.0 and 2.0 mS·cm-1 were found to have a greater effect on the growth than EC at 4.0 mSꞏcm-1. The normality (marketable) rate of fruit, the soluble solid content, and paprika growth showed that the coir was generally better than the rockwool regardless of the supply EC concentration. The values of the yield per plant at an EC concentration of 4.0 mS·cm-1 was mostly similar at 1.6 kg (coir 50:50), 1.5 kg (coir 70:30) and 1.5 kg (rockwool), but the yield of the rockwool was 88%, which was lower than 98% and 94% yield of the coir substrate. Therefore, this concludes that coir substrate is more effective than rockwool at improving paprika productivity. The results also suggest that the use of coir substrate for paprika has many benefits in terms of reducing production costs and preventing environmental destruction during post-processing.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 파종 및 양액 관리
    2.2. 양액 EC 및 배지 처리
    2.3. 생육, 과실 및 근권조사
    2.4. 통계분석
3. 결과 및 고찰
    3.1. 생육 특성
    3.2. 과실 특성
    3.3. 배지 내 뿌리 상태
4. 결 론
REFERENCES

• 정선옥(충남대학교 바이오시스템공학과) | Sunok Chung (Department of Biosystems Machinery Engineering, Chungnam National University)
• 이상규(농촌진흥청 국립농업과학원 농업공학부) | Sanggyu Lee (Department of Agricultural Engineering, National Institute of Agricultural Science, RDA)
• 백정현(농촌진흥청 국립농업과학원 농업공학부) | Jeonghyun Baek (Department of Agricultural Engineering, National Institute of Agricultural Science, RDA)
• 이재수(농촌진흥청 국립농업과학원 농업공학부) | Jaesu Lee (Department of Agricultural Engineering, National Institute of Agricultural Science, RDA) Corresponding author
• 홍영신(농촌진흥청 국립농업과학원 농업공학부/충남대학교 바이오시스템공학과) | Youngsin Hong (Department of Agricultural Engineering, National Institute of Agricultural Science, RDA/Department of Biosystems Machinery Engineering, Chungnam National University)