| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a biodegradable mulching film allowing to select a decomposition speed according to the state of use, in spite of being one sheet of film. <P>SOLUTION: This biodegradable mulching film is formed at least from a first layer and a second layer. The first layer and the second layer are made of biodegradable resin. The decomposition speed of the first layer and the decomposition speed of the second layer become different by adding an additive at least either to the first layer or the second layer, or selecting resin component. The first layer and the second layer are each a surface layer of the biodegradable film, and either the first layer or the second layer is spread on soil so as to contact the soil surface. <P>COPYRIGHT: (C)2013,JPO&INPIT |
