The development of heat-treated wood chips as mulching material
2008
Honma, S.(Hokkaido. Forest Products Research Inst., Asahikawa (Japan)) | Takeuchi, T. | Nakamura, T. | Umehara, K. | Takehana, K. | Kasai, A. | Ishihara, S.
For the development of a new wood chip use, the chemical properties after heat-treatment, color changes and examination for use as a mulching material were investigated. The chemical composition and the FT-IR spectrum of the heat-treated wood chips showed changes from pyrolysis of components in comparison with before heat-treatment. On the other hand, the color of the materials clearly changed to dark brown after processing at 235 deg C and 245 deg C, and became blackish brown after processing at 275 deg C. Because the L* and b* values mostly fell with the rise of the processing temperature according to measurement with a colorimeter, it was observed that the luminosity and chroma deteriorated and dark color changes advanced. Effects (restraining of weed outbreak in heat-treated wood chips laying ward, and so on) which were useful for the improvement of appearance of a garden were shown in outdoor-exposure tests.
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