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研究伞伐更新法对赫卡尼亚森林系统中森林再生和林分结构的影响。在伊朗北部优势种为山毛榉(Fagus orientalisLipsky)的硬木林,采取伞伐更新法和非伞伐更新法方法设计实验区。结果表明,在山毛榉(F orientalis Lipsky)林中采用伞伐更新法处理,明显影响林下草本植物种的频度和密度。伞伐更新法处理后,林堇菜(Viola silvestris Lam.)、车叶草(Asperula odorata L.)、苔草(Carex spp.)和悬钩子(Rubushyrcanus Juz)的种频度明显增加。在对照区,树种的胸高直径(57.50±2.15cm)大于被处理区(50.67±1.88cm)的树种的胸高直径(50.67±1.88 cm),但对照区和处理区的树种的高度值相似。在1995-2005年间,波斯铁木(Parrotia persica)苗木数量增加到13.2%,而山毛榉(F orientalis)和欧洲鹅耳枥(Carpinus betulus)的苗木数量却明显减少。总之,应该利用其它育林方法,如,带状择伐作业,而不是伞伐更新法培育赫卡尼亚森林中山毛榉林。
Study on the Effect of Umbrella Cutting and Regeneration on Forest Regeneration and Stand Structure in Hecania Forest System. In the hardwood forest of Fagus orientalis Lipsky, the dominant species in northern Iran, the experimental area was designed by the method of umbrella cutting and non-umbrella cutting. The results showed that the use of umbrella regeneration method in the F orientalis Lipsky forest significantly affected the frequency and density of understory herbaceous species. The frequency of Viola silvestris Lam., Asperula odorata L., Carex spp. And Rubushyrcanus Juz increased significantly after the treatment with the umbrella cutting method. In the control area, the thoracic diameter (57.50 ± 2.15cm) of tree species was larger than that of the tree species (50.67 ± 1.88cm) in the treated area (50.67 ± 1.88cm), but the tree species in the control area and the treatment area had similar height values. Between 1995 and 2005, the number of seedlings in Parrotia persica increased to 13.2%, while the number of seedlings in F orientalis and Carpinus betulus decreased significantly. In conclusion, other methods of plantation should be used, such as striping and selective cutting, instead of beehive regeneration to cultivate beech forests in the Hachania forest.