Influence for Soil Environment by Continuing use of Biodegradable Plastic |
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Authors: | Akihiko Masui Satoshi Ikawa Nobuaki Fujiwara Hiroaki Hirai |
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Institution: | (1) Technology Research Institute of Osaka Prefecture, 2-7-1, Ayumino, Izumi, Osaka 594-1157, Japan;(2) Department of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Sakai, Osaka 599-8351, Japan |
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Abstract: | The influence on soil environment by continuing use of the biodegradable plastic films (biodegradable mulching films) in farmland
was investigated. The difference was not seen in the amount of soil bacteria between mulching film plowing sections and non-plowing
sections. The total bacteria amount did not increase by the effect of plowing the biodegradable mulching film. Poly-(butylene
succinate and adipate) (PBSA) and poly-(ε-caprolactone) (PCL) decomposing bacteria did not increase in PBSA and PCL mulching
film plowing sections comparing polyethylene covering section (PE) and no-film section. Polylactic acid (PLA) decomposing
bacteria were not detected in all sections. Total denaturing gradient gel electrophoresis (DGGE) band patterns did not show
a clear transition of the bacterial community structure in both the cultivating and promoting sections. In usual usage condition
of the biodegradable plastic films, it was hardly influence to the soil environment such as bacterial community structure
in farmland. |
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