실내조명에 따른 무궁화 ‘백단심’의 경관구성요소별 특징 및 도입방안

Abstract

This study was conducted to find an efficient introduction plan by examining the landscape characteristics of each indoor light source in order to introduce Mugunghwa, which has high symbolism as a national flower, into the indoor space. As an experimental plant, Hibiscus syriacus 'Paektanshim known to have relatively strong shadow tolerance characteristics among Mugunghwa varieties, was selected, and experiments were conducted at four types of light sources, including fluorescent lamp, LED lamp, three wave lamp, and optical fiber, and at 500, 750, 1500, and 2,500lux for seven months. Leaf length, leaf width, plant height, number of leaves, number of fallen leaves, joint internode length, and chlorophyll were investigated as landscape measurements of plants. Photosynthesis rate(Pn), CO2 absorption rate(CO2), intercellular CO2 concentration(Ci), atmospheric CO2 concentration(Ca), pore conductivity(Cs), and increasing amount(Tr) were measured as physiological factors of plants. In addition, stomatal density was observed to confirm whether photosynthesis rate was well performed, and the blooming rate of each light source and the color difference meter were used to investigate. The experimental results and introduction plans are as follows. First, among the landscape components of plants, the number of leaves showed a statistically significant difference in all light sources. The number of leaves affects the width of the tree's crown and tree shapes along leaf length and leaf width, and the higher the luminosity, the more leaved, and the most leaved under fiber optics 1,500lux. The higher the luminosity, the larger the size of the leaf length and leaf width. Second, Mugunghwa has unique leaves, but its flowers are beautiful and symbolic, so it is preferred, but Hibiscus syriacus 'Paektanshim blooms from August to October. Looking at the optical conditions of each light source for the purpose of viewing flowers, it was identified as 750lux to 2,500lux for fluorescent lamp, 1,500lux to 2,500lux for LED lamp, 750lux to 2,500lux for three wave lamp, and 1,500lux to 2,500lux for fiber optics. The most effective light source and light intensity were found to be 1,500lux and 2,500lux of optical fibers. Third, the freshness of the leaves can also be measured by the amount of photosynthesis rate and the stomatal characteristics of the leaves, and the higher the luminous intensity, the higher the photosynthesis rate. The stomatal frequency by light source was 7 to 28, and the largest stomatal frequency was found in 1,500 lux of LED lights and 1,500 lux of optical fiber. Fourth, as a result of color difference analysis, the flower color was closer to light green than pink and showed a color close to blue. The value of L* was found to be very bright as it showed a value of 90 or more. Finally, considering the growth condition, growth volume, and flowering rate, it is judged that the optimal light source of the Hibiscus syriacus 'Paektanshim is 1,500lux of optical fiber. However, it is necessary to improve the utilization value and utilization area of the national flower Mugunghwa by identifying the appropriate light source and appropriate light intensity for more Mugunghwa varieties in the future and adding experiments on the flowering rate by age.