Identification of stress factors in soil organic matter dynamics in humid regions and its utilization in agriculture

对引入胁迫因子改变湿润地区土壤有机质动态的可能性进行了试验。在定量评价土壤酸度等胁迫因素对分解过程的影响时，对包括多糖分解过程中的增溶和矿化过程以及底物利用中土壤微生物的两步代谢过程的两步分解模型进行了积极评价，并成功地用Michaelis-Menten动力学描述了单独的分解过程。土壤酸度被认为是显著影响这两个过程的最重要因素之一。

The possibility for introducing stress-factors that could modify the soil organic matter dynamics under humid regions was tested. Two-step decomposition model including both solubilization and mineralization processes in the decomposition of polysaccharides and two-step metabolism by soil microorganisms in substrate utilization were evaluated positively in quantifying influence of stress factors such as soil acidity on the processes ; and the Michaelis-Menten kinetics was successfully applied for describing individual decomposition processes. The soil acidity was considered to be one of most important factors that significantly affected both processes.