辽宁省朝阳地区油松天然更新影响因子调查研究

对朝阳地区油松更新的现状及影响因子进行了调查研究。实验共设置60块临时标准地,采用50m^2样圆法进行调查。通过对不同坡向、坡位、土层厚度、郁闭度条件下油松天然更新情况的调查,得出如下结论：在阴坡、半阴坡生长的油松的天然更新情况较好,半阳坡、阳坡更新情况不好;下覆生长的幼树明显比中覆和上覆好;在郁闭度中等（0.3～0.6）的林分中,油松的天然更新效果最好,郁闭度过大（〉0.6）或过小（〈0.3）都不利于油松的天然更新;土层厚度较厚的地区油松更新要好于土层中等和较薄的地区。这些研究结论,为朝阳半干旱地区油松的天然更新工作提供了理论依据。

Survey Research on Natural Regeneration Impact Factors of Chinese Pine in Chaoyang District of Liaoning Province

This paper makes survey research on natural regeneration impact factors of Chinese pine in Chaoyang District of Liaoning Province,and setting 60 temporary sample plots and adopting 50 m2 round quadrat for investigation on the natural regeneration of Chinese pine under the conditions of different slope direction,slope position,soil thickness and canopy density,draws the conclusions that:the natural regeneration of Chinese pines growing on the shady slope and semishady slope is better,the natural regeneration...