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Joon-Kook Kwon,Kyoung-Sub Park,Hyo-Gil Choi,Sun-Yi Lee,K. Bekhzod,Mi-Ran Hwang,Nam-Jun Kang 경상대학교 농업생명과학연구원 2013 농업생명과학연구 Vol.47 No.1
This experiment was carried out to determine the effect of different spectrum conversion greenhouse films (red, blue, red+blue) to changing microclimate and subsequent effect on growth and quality of lettuce (Lactuca sativa L.), tomato (Solanum lycopersicum L.), and melon (Cucumis melo L.) Transmission of PAR (photosynthetic active radiation, 400-700 nm) under red, blue, and blue+red (BR) films was higher by 7.2, 7.6, and 5.8%, respectively, as compared with control greenhouse film. Light transmission in the 300-1100 nm wave band was 91.6% and 91.3% under red and blue films, respectively, compared to 86.4% under control film. Mean daytime temperature in greenhouse was slightly higher in red and blue film and mean night time temperature was higher in BR film. There were no significant differences in relative humidity among the films. Number of leaves and plant fresh weight of lettuce were higher under BR film. Total number of marketable tomato fruits was greater under blue and BR film and fruit weight was heavier under red and blue film compared to control film. Under BR and red film melon fruit weight was increased by 140 g and 80 g respectively, as compared to control film. Sugar content in melon and tomato fruits was not affected by covering films.
Joon Kook Kwon,Bekhzod Khoshimkhujaev,Kyoung Sub Park,Hyo Gil Choi,Jae-Han Lee,In Ho Yu 한국생물환경조절학회 2014 생물환경조절학회지 Vol.23 No.4
소형 비닐하우스에 2종류의 기능성 필름과 관행의 PE 필름을 피복하고 청치마, 적치마, 치커리 등 3종의 엽채류를 재배하여 기능성필름의 특성을 검토하였다. 2종류의 기능성 필름은 PO(polyorefine)계수지로 만들어졌으며, 엽채류는 흙과 펄라이트를 혼합한 배지에서 육묘하였다. 필름의 광학적 특성에 있어서 기능성 필름은 관행의 PE 필름과 비교하여 광합성 유효광(400-700nm)의 투과율이 높고 자외선(300-400nm)의 흡수율이 높았다. 피복 3개월 후의 광합성 유효광 투과율의 감소 수준은 기능성필름이 PE필름보다 작았다. 이 같은 요인으로 인해 엽채류의 생육과 수량이 기능성 필름을 피복한 하우스에서 높았다. Three leaf vegetables, namely green lettuce, red lettuce (Lactuca sativa) and red-veined chicory (Cichorium intybus) were grown in minigreenhouses covered with two new functional films and conventional polyethylene film (PE). Seedlings of leaf vegetables were transplanted in a plastic troughs filled with soil-perlite mixture. Two functional films were made from polyolefin (PO) material. Measurement of optical characteristics showed that polyolefin films have better transmittance for the photosynthetic active radiation (PAR, 400-700nm) and higher absorptance for the ultraviolet radiation (UV, 300-400nm) in comparison with the conventional PE film. After three months of utilization higher loss in PAR transmittance was observed for conventional PE film. Leaf vegetables growth was enhanced and yield was increased in greenhouses covered by new functional films.
Joon-Kook Kwon(권준국),Kyoung-Sub Park(박경섭),Hyo-Gil Choi(최효길),Sun-Yi Lee(이선이),K. Bekhzod(벡조드),Nam-Jun Kang(강남준) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.4
본 연구는 비닐하우스 피복재인 폴리오레핀(PO)계 필름의 효과를 구명하고자 관행의 피복필름(PE + EVA)과 비교하여 피복재별 물리적 특성과 상추와 오이의 생육 및 수량을 검토하였다. 인장강도, 인열강도 등 피복재의 물리적 특성은 일반필름보다 PO필름이 우수하였다. 400~700 ㎚의 광합성유효광의 투과율은 일반필름에 비해 PO필름이 4.1% 높았고, 전체 광선투과율(300~1,100 ㎚)도 PO필름이 4.3% 높았다. 하우스 내의 주간 평균기온은 일반필름보다 PO필름이 1.5℃ 높았고, 야간 평균기온도 PO필름이 0.8℃ 높게 유지되었다. 주야간 상대습도는 필름 간에 유의적 차이가 없었다. 엽록소 함량은 오이의 경우 필름 간 유의적 차이는 없었으나 일반필름에 비해 PO필름이 엽록소 a가 약간 높았으며, 상추는 PO필름이 일반필름보다 유의하게 높았다. 수확기 오이 생육에 있어서 초장, 엽면적, 생체중 및 건물중 모두 일반필름보다 PO필름을 피복한 하우스에서 크고 무거웠다. 수확한 오이의 과실 수량은 일반필름에 비해 PO필름이 14.0% 높았고, 상추 수량도 일반필름보다 PO필름이 13.6% 높았다. This study evaluated the effect of polyolefine greenhouse covering film on growth of lettuce and cucumber. The growth of lettuce and cucumber plants under conventional film (polyethylene plus ethylenevinyl acetate, PE + EVA) and polyolefine (PO) film were evaluated in a greenhouse. The physical qualities of PO film, such as tensile strength and tear strength, were stronger than conventional PE + EVA film. PO film showed 4% higher transmission performance in photosynthetic active radiation (PAR) than PE + EVA film. The average day and night temperature in greenhouse under PO film were 1.5oC and 0.8oC higher but there was no significant difference in relative humidity compared with conventional film. Chlorophyll content of lettuce and cucumber plants grown under PO film were higher than conventional film. Growth characteristics; plant height, leaf area, fresh weight and dry weight of cucumber was shown better for PO film. The yields of cucumber and lettuce was increased 14.0% and 13.6% respectively, when the crops were grown under PO covering film greenhouse.