【摘要】 为探寻最适合桉树人工林及林下植被生长的林地清理方式,选择福建省华安县西陂国有林场不同林地清理方式(全面清除、全树收获、商业收获、采伐剩余物加倍和常规处理)的桉树人工林,进行3年定位观测研究.结果表明:(1)不同林地清理方式对桉树人工林树高、胸径和单株材积均有显著影响,造林半年后,全面清除处理的桉树人工林树高、胸径和单株材积生长明显优于其他林地清理方式;造林第1年,采伐剩余物加倍处理的桉树人工林树高、胸径和单株材积生长量最高;造林1.5年到第3年,商业收获处理的桉树人工林树高、胸径和单株材积生长优势明显,商业收获>全树收获>采伐剩余物加倍>全面清除>常规处理.(2)商业收获处理在增加林下植被数量上有较大优势,商业收获>全树收获>常规处理>全面清除>采伐剩余物加倍.(3)造林1.5年和第3年,商业收获处理的林下植被丰富度、群落盖度、Shannon-Wiener多样性指数、Simpson多样性指数和Pielou均匀度指数也最大.表明采用商业收获进行林地清理更有利于桉树人工林及林下植被的生长.更多还原

【Abstract】 In order to explore the most suitable ground clearance for Eucalyptus plantation and understory vegetation, different ground clearance methods(total clearance, whole tree harvest, commercial harvest, double residue and routine treatment) were applied to Eucalyptus plantation in Xipi state-owned forest farm of Hua’an County in Fujian Province. Orientation observation was conducted for 3 years. The results showed that different ground clearance methods exerted significant impacts on the tree height, DBH and individual volume of Eucalyptus plantation. After 6 months of afforestation, the growth of the tree height, DBH and individual volume of Eucalyptus plantation from thorough clearance were obviously better than those of other methods. While at the end of the first year, the tree height, DBH and individual volume of Eucalyptus plantation with double residue reached the highest among all methods. In the 1.5-3.0 years of afforestation, all 3 indicators of Eucalyptus plantation with commercial harvest were obviously advantageous over other methods. And the overall growth status of Eucalyptus plantation in a descending order was followed by commercial harvest, wholel tree harvest, double residue, total clearance, routine treatment. Moreover, commercial harvesting resulted in the most varieties of understory vegetation, which was followed by whole tree harvest, routine treatment, total clearance, double residue. In the 1.5-3.0 years of afforestation, richness, community coverage, Shannon-Wiener diversity index, Simpson diversity index and Pielou evenness index were also the highest among all methods. Therefore, commercial harvest is more beneficial for the growth of Eucalyptus plantation and understory vegetation.更多还原