Durability of Woody Substance against Aerobic Soil Bacteria

研究了好氧土壤细菌对木本物质的生物降解以及木屑对土壤细菌的耐久性差异。研究结果总结如下：木质物质在垃圾（与食物有关的有机物）等非木质物质存在的情况下，受到好氧土壤细菌的攻击，木质物质不易被好氧土壤细菌降解。虽然热水提取物的含量增加了，而全纤维素的含量减少了，但在gademine运行三个月期间，木质素的含量没有发生明显变化。随着木屑颗粒的大小，木屑的空隙率、保水率和排水性都发生了变化。在GADE机器中，锯末对磨损的耐久性取决于锯末颗粒的大小。不同浓度的水溶性物质对细菌的生长有影响。

Biodegradation of woody substance by aerobic soil bacteria and difference in the durability of sawdusts against soil bacteria have been studied.The results are summerized as follows:1. Woody substance has not easily been degraded by aerobic soil bacteria when they are attacked by aerobic soil bacteria in the presence of non-woody substances such as garbage (food related organic substances).2. Although the contents of the hot water extracts have increased and the contents of the hollocelluloses have decreased, the contents of the lignin have not changed drastically during the oeration of a GADEmachine for three monthes.3. Vacant space, water retention, and water drainage of sawdusts have changed according to the size of the particles of the sawdusts.4. Durability of the sawdusts against the abrasion in the GADE machine is different in the size of the particle of the sawdusts.5. Water soluble substances have effected on the growth of the bacteria in different concentarations.