Studies on the low-density and many-thinning management of larch [Larix leptolepis] plantations for long-rotation to obtain large diameter wood
2007
Nakajima, K.(Shinshu Univ., Minamiminowa, Nagano (Japan)) | Hoshina, M. | Ueki, T.
At present, Larch plantation management is having difficulties with short-rotation of conventional model and seeking long-rotation to obtain large diameter wood production. However, since there is short history of Larch plantation, not enough enrichment of this management and systematization efforts have been insufficient. Hence it is important to establish a management system for making long-rotation to obtain large diameter wood production true based on accumulated management. Therefore, in the studies, possible effects of the long-rotation management to obtain large diameter wood, stand structure and stand growth with silvicultural practices were analyzed taking low-density and many-thinning management through fixed point stand survey at Hase, Ina city of Nagano prefecture. The result revealed that large diameter wood over 40cm DBH at relatively early stage 60 years can be cultivated keeping stand density Sr 25% and stem-crown ration 50% having low-density and many-thinning in this management system. Moreover, excellent diameter growth and large timber production can also be expected even after 60 years. In conclusion, low-density and many-thinning management makes possible for long-rotation to obtain large diameter wood.
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