著者

三並 めぐる 仁科 弘重 續木 寛子 高山 弘太郎

出版者

生態工学会

雑誌

Eco-Engineering (ISSN:13470485)

巻号頁・発行日

vol.23, no.2, pp.47-55, 2011-04-30 (Released:2011-06-02)

参考文献数

39

被引用文献数

3

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This study analyzed the effects on the psychological state of high school students of having plants in the classroom and of raising plants. Two separate experiments were carried out, using students from three classes of Ehime University Senior High School. Analysis of psychological state was carried out using Semantic Differential Method and Profile of Mood States, along with analysis of brain waves. The subjects also completed a questionnaire. In the first experiment, the three classes were divided into three groups. The classroom of the foliage plant group and the flower group contained foliage plants and live roses placed in the classroom, respectively. As the results, the foliage plant group was evaluated higher for “sense of tranquility” than the flower group and the control group, and more students in the foliage plant group than the flower group felt positive effects. In the second experiment, students were divided into three groups: Group A, no selection of plants and no care of plants; Group B, no selection of plants but care of plants; and Group C, selection of plants and care of plants. A single foliage plant was distributed to every student and students were allowed to place their plants where they liked. As the results, scores were high for the first factor (pleasant) and the second factor (emotional changes) in group. Proactive involvement with plants in the Group B and C increased attachment to and interest in plants, and was effective as a method for relieving stress and increasing communication.

著者

久枝 和昇 高山 弘太郎 仁科 弘重 東 幸太 有馬 誠一

出版者

日本生物環境工学会

雑誌

植物環境工学 (ISSN:18802028)

巻号頁・発行日

vol.19, no.1, pp.19-26, 2007 (Released:2008-04-02)

参考文献数

11

被引用文献数

2 3

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We have been conducting research on the improvement of productivity in large-scale greenhouse tomato production. One of the factors that largely influence the tomato productivity is the rate of CO2 fixation by photosynthesis. The amount of CO2 fixed by the whole plant canopy varies considerably and is known to depend on canopy structure.To date, few studies have analyzed photosynthesis in plant canopies within the context of improving productivity for large-scale tomato production. Consequently, obtaining data and developing analytical methods that are relevant to production is important.The present study investigated the rate of photosynthesis within a plant canopy and the vertical distribution of the amount of CO2 fixed by plants with the aim of increasing CO2 fixation and yield. This was done by analyzing the photosynthetic rate in individual leaves, examining plant canopy structure and measuring light intensity within the plant canopy.It was found that the leaves located in the upper parts of canopies were exposed to higher light intensities, experiencing light saturation and had higher rates of photosynthesis at the point of light saturation than leaves in the middle and lower parts of the plant. It was assumed that this was due to the occurrence of senescence and the development of shade-leaf characteristics in the leaves of the lower parts of the plant. The results implied that removal of the leaves under 150 cm or farther from the apical meristems could increase CO2 fixation and productivity of the plant canopy.The analytical methods developed in the present study can be applied to assess the efficacy of seasonal management methods such as cropping patterns, utilization of lateral buds, and leaf thinning, for maximizing yields.

著者

有馬 誠一 上加 裕子 神村 泰地 仁科 弘重 羽藤 堅治 高山 弘太郎

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2011, pp."1A1-A02(1)"-"1A1-A02(2)", 2011-05-26

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The autonomous driving unit using the regression reflective type laser sensor and the laser range sensor has been developed aiming at automation and robotization of various work in the intelligent greenhouse (harvesting and pest control) and plant diagnosis information measurement. Some study cases of on-board equipped system of harvesting, pest control and plant diagnosis information measurement are reported.