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2019 Vol.28, Issue 1 Preview Page
Effects of Local Cooling and Root Pruning on Budding and Local Heating on Heating Energy Consumption in Forcing Cultivation of Strawberry

딸기 촉성재배 시 국소 냉방 및 단근처리와 국소난방이 화방출뢰와 난방에너지소비에 미치는 영향

Jin Kyung Kwon1*
,
Suk Won Kang1
,
Yee Paek1
,
Jong Pil Moon2
,
Jae Kyung Jang1
,
Sung Sik Oh1
권 진경1*
,
강 석원1
,
백 이1
,
문 종필2
,
장 재경1
,
오 성식1
1Department of Energy and Environment, National Institute of Agricultural Science, RDA, Jeonju 54875, Korea
2Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Science, RDA, Haman 52054, Korea
1국립농업과학원 에너지환경공학과
2국립원예특작과학원 시설원예연구소
*Corresponding author: cen55@korea.kr
31 January 2019. pp. 46-54
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Abstract

Experiments of local cooling and heating on crown and root zone of forcing cultivation of strawberry ‘Seolhyang’ using heat pump and root pruning before planting were conducted. During the daytime, the crown surface temperature of the crown local cooling treatment was maintained at 18 ~ 22°C. This is suitable for flower differentiation, while those of control and root zone local cooling treatment were above 30°C. Budding rate of first flower clusters and initial yields were in the order of crown local cooling, root zone local cooling and control in root pruning plantlet and non pruning plantlet, except for purchase plantlet. Those of root pruning plantlet were higher than those of non pruning plantlet. These trends were evident in the yield of the first flower cluster until February 14, 2018, and the effect of local cooling and root pruning decreased from March 9, 2018. The budding rates of the second flower cluster according to the local cooling and root pruning treatments were not noticeable compared to first flower cluster but showed the same tendency as that of first flower cluster. In the heating experiment, root zone local heating(root zone 20°C+inside greenhouse 5°C) and crown local heating(crown 20°C+inside greenhouse 5°C) saved 59% and 65% of heating fuel, respectively, compared to control(inside greenhouse 9°C). Considering the electric power consumption according to the heat pump operation, the heating costs were reduced by 55% and 61%, respectively.

Keywords
crown
flower differentiation
heating cost
root zone
Seolhyang

히트펌프와 냉온수 배관을 이용한 촉성재배 ‘설향’ 딸 기의 관부와 근권부에 대한 국소 냉난방 시험과 정식 전 딸기묘의 단근처리 시험을 수행하였다. 정식(2017년 8월 31일) 후 주간의 관부 표면온도는 국소냉방구가 18~22°C로 화아분화에 적합한 온도를 유지한 반면 무처 리구와 근권부 냉방구는 화아분화 한계온도인 25°C를 상회한 30°C 이상으로 나타났다. 정식 후 30일 경과 시 의 생육조사 결과 국소냉방처리 간의 생육차이는 없었으 며 단근처리묘에서 초장과 엽병장이 상대적으로 작았으 나 전체적으로 지상부의 생육저하는 크지 않은 것으로 나타났다. 국소냉방 및 단근처리에 대한 화방출뢰율을 조사한 결과 정화방 출뢰율은 구입묘를 제외하고 단근처 리묘와 비단근처리묘에서 모두 관부 국소냉방구, 근권부 국소냉방구, 대조구의 순서로 높게 나타났으며, 대조구, 근권부 국소난방구, 관부 국소난방구 모두에서 단근처리 묘가 비단근처리묘에 비해 높게 나타났다. 정화방 출뢰 율은 관부 국소난방구 단근처리묘가 가장 높았으며 가장 낮은 무처리 비단근처리묘 보다 시기별 최대 3.8배 높게 나타났다. 1차 액화방의 출뢰율은 처리구 간 차이가 정 화방에 비해 크지 않으나 정화방과 동일한 경향을 나타 내었다. 2018년 3월 27일까지의 상품과 수확량은 구입 묘를 제외하고 관부 국소난방구, 근권부 국소난방구, 대 조구의 순서로 나타났으며, 단근처리묘가 비단근처리묘 보다 수확량이 높았다. 이러한 경향은 2018년 2월 14일 까지의 정화방 중심의 초기수확량에서 뚜렷하게 나타났 으며 2018년 3월 9일부터 국소냉방과 단근처리의 영향 은 줄어드는 것으로 나타났다. 난방시험의 경우 근권부 국소난방구(근권 20°C+공간 5°C)와 관부 국소난방구(관 부 20°C+공간 5°C)는 대조구(공간 9°C) 대비 각각 59% 와 65%의 난방유 절감이 가능하였으며, 히트펌프 가동 에 의한 전기소비를 반영하였을 때 난방비는 각각 55% 와 61%가 절감되는 것으로 분석되었다. 히트펌프와 배 관을 이용한 촉성재배 ‘설향’ 딸기의 관부 국소냉난방은 초기수확량 증가와 난방에너지절감 효과를 확인할 수 있 었으나 화아분화 촉진에 의한 화방출뢰의 조진화는 정식 시기, 환경조건, 초기생육이 미치는 영향이 크므로 이와 관련한 추가적인 연구가 필요한 것으로 판단되었다.

키워드
관부
화아분화
난방비용
근권부
설향
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 28
  • No :1
  • Pages :46-54
  • Received Date : 2018-10-05
  • Revised Date : 2019-01-04
  • Accepted Date : 2019-01-09
  • DOI :https://doi.org/10.12791/KSBEC.2019.28.1.46
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