Durability of Woody Substance against Aerobic Soil Bacteria

本文研究了好氧土壤细菌对木质物质的生物降解作用以及不同木屑对土壤细菌的耐受性差异，主要结果如下：1。在垃圾（食品相关有机物）等非木质物质存在下，木质物质不易被土壤好氧细菌降解.虽然热水浸出物的含量增加了，而纤维素的含量降低了，但木质素的含量在GADE机运行的三个月内没有发生大的变化.木屑的空隙率、持水率和排水率随木屑颗粒的大小而变化。锯屑在GADE机器中对磨损的耐久性因锯屑颗粒的大小而异。水溶性物质在不同浓度下对细菌生长有影响。

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.