二次世界大战后日本营造的人工林,现已达到需要进行抚育间伐的时期,且其面积正在与日俱增。但是,过去所实施的下层抚育间伐,由于伐出多为径级小和质量差的木材,不仅用处不大,在经济方面也不上算。因此,人工林抚育间伐作业不得不停顿下来。为进一步寻求获得经济效益的抚育间伐对策,根据一些民有林经营者倡议,在高知营林局的主持、笔者的参与设计下,进行了一种既要考虑眼前间伐的木材能有销路,得到收益,又要体现出保留的林分将来为生产创造更大价值的择伐或抚育间伐木。这种间伐方法的特点,就是从间伐第一次开始直到主伐为止,经多次间伐,均以林分中优势木 Plantations built in Japan after the Second World War have now reached a period of need for tending and thinning and are growing in size. However, in the past, the lower tending and thinning of the past was not only economically ineffective but also uneconomical due to the fact that most of the lumber was cut into small and poor quality timber. Therefore, plantation tending thinning operations had to pause. In order to further seek the tending and thinning measures to obtain economic benefits, under the initiative of some private forest managers, under the auspices of the Kaohsiung Forestry Bureau and the author’s participation in the design, a plan was put in place to sell timber for immediate consideration and benefit , But also to show that the reserve will create more value for production in the future or to cultivate thinning logs. This thinning method is characterized by the first time from thinning until the main cut, after many thinning, are in the dominance of wood