Abstract
This study was conducted to improve light environment of oriental melon cultivation in winter season. Three polyolefin foreign films (J-1, J-2, J-3) and three polyethylene domestic films (K-1, K-2, K-3) with different film thickness, ultraviolet ray interception and infrared ray absorption were used. As the result of this experiment, soluble solid of oriental melon fruit in K-3 was $14.3^{\circ}Brix$, those in J-3 and J-2 were higher by 1.3 and $0.8^{\circ}Brix$, respectively. Chromaticity (a value) of pericarp in K-3 was 0.5, those in J-3, J-1 and J-2 were higher by 3.3, 2.3 and 1.9, respectively. Especially, fermented and malformed fruit rates in J-1, J-2 and J-3 were decreased and marketable fruit rates were increased. Marketable yield in K-3 was 1,622 kg per 10a, those in J-1, J-3 and J-2 were increased by 31.2%, 23.8% and 18.5% compare to K-3, respectively. In this study, Polyolefin films (J-1, J-2, J-3) with thickness and infrared ray absorption ratio keeping higher heat conservation, therefore, soluble solid and chromaticity of fruit were increased, fermented fruit rate was decreased, and marketable fruit rate and yield were increased.
참외 재배시설의 광 환경 개선을 위하여 필름두께, 자외선 차단율, 적외선 흡수율이 다른 PO계 필름 3종(J-1, J-2, J-3), PE 필름(K-1, K-2, K-3)을 비교하여 참외를 재배한 결과는 다음과 같다. 재배지역과 품종에 따라 다소의 차이는 있으나 오복꿀참외의 경우, K-3의 당도는 $14.3^{\circ}Brix$이고 J-3, J-2에서는 이보다 각각 $1.3^{\circ}Brix,\;0.8^{\circ}Brix$ 정도 높은 경향이었다. 과피의 색도(a 값)는 K-3의 0.5에 비하여 J-3, J-1, J-2에서 각각 3.3, 2.3, 1.9 정도 더 높았다. 또한 J-1, J-2, J-3 처리구에서 발효과율 및 기형과율이 감소하였고 상품과 율은 증가하였다. 10a당 상품수량은 K-3의 1,622 kg에 비하여 J-1, J-3, J-2에서 각각 31.2%, 23.8%, 18.5%증가하였다. 이상의 결과로 볼 때 J-1, J-2, J-3등의 polyolefin계 필름은 필름두께가 두껍고 적외선 흡수율이 높아 보온효과가 우수하였으며 이로 인하여 과실의 당도가 증가하고 색도가 우수한 것으로 생각된다. 또한 발효과 발생이 감소하고 상품과율이 증가하는 등 품질이 향상되었고 수량도 증가되었다.
