改培型蒙古栎生物防火林带的防火效果及其生态环境变化研究

采用人工清理和计划烧除相结合的方法建立并维护改培型蒙古栎生物防火林带，对建设前后防火林带的林分结构、可燃物载量及土壤环境等因子对比分析的结果表明：防火林带内优势树种基本都是耐火树种，建设和维护防火林带的过程中，胸径〉2cm的乔木树种未发生明显变化；林带下土壤物理性质和养分含量未产生显著影响；可燃物载量大幅减少，一般在2t／ha以下；卫生条件有了显著改善，可有效地阻隔低强度地表火和地下火的蔓延，并可以此为依托采取适当措施有效控制高强度森林大火的发生和蔓延。

Research on Fire Effects and Ecological Environmental Changes for Querus mongolicain Biological Fire Belt by Transformed Cultivation

To establish and maintain Querus mongolica biological fire belt by transformed cultivation was constructed by manual cleaning and prescribed burning. The stand structure, loading of forest fuels and soil environmental factors were analyzed. The results showed that most dominant species were refractory tree species, loading of forest fuels was obviously decreasing and forest sanitation was obviously improved. The spread of low - intensity surface fire and underground fire was effective shielded against. The spread of high - intensity surface fire was slow down. The number of tree species above 2m did not change significantly. Construction methods on soil physical properties and nutrient contents did not have a significant impact.