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Image Analysis for Moss Production Under Controlled Environment

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  034097,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14103) @2003
Authors:   Sachi Uemura, Haruhiko Murase, Tsuyoshi Okayama, Katsusuke Murakami
Keywords:   moss Rhacomitrium Canescens, dissolved oxygen concentration

The roof top greening helps reduce the air pollution caused by emitted CO2 and prevents the environmental deterioration resulting from heat island phenomenon. Now, much attention is being paid to the use of moss as a greening plant for building surfaces because of these characteristics. Among all kinds of moss, Rhacomitrium Canescens is the most suitable for the greening of building surfaces. This moss does not need any soil and fertilizer for growing, nor does it add a weight burden to the surface. In addition, it can survive under very dry conditions. Moreover, it is almost maintenance-free. In spite of its popularity, the supply of moss has not satisfied the market demand because of the fact that moss grows very slowly. Therefore, the purpose of this research is to develop a system for making moss grow faster. In this research photosynthetic activities were qualified by using an oxygen-generating rate of moss obtained when photosynthesis photon flux density (PPFD) and temperature was changed.

The oxygen-generating rate corresponded to the gross photosynthesis. It was found that the moss had the most active photosynthesis under a condition of 35 degree centigrade and 200.500mol.m .2.s.1. Correlation coefficients between the factor ratio of RGB and the photosynthesis rate indicated that there was a correlation between the factor of G and the photosynthesis rate. Also we found that photosynthesis can be visualized by using the image information obtained.

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