シラカシ択伐施業に関する研究(第3報) : 下山佐択伐林の萌芽について(1) : 当年生明芽の成長

その他

In the first report in 1960, the authors reported a remarkably great productivity of a selection coppice forest practised by O. Yamane. Ever since we continued studying of this forest, especially of sources of the high productivity. This papers will report the growth of the current year sprouts as a study on the regeneration of this forest. This forest consists of coppiced "Shirakashi" trees which are standing on stumps of various sizes. A stump become very large after repeated regenerations. We studied the growth and the number of current year sprouts shooted from stumps after a cutting of old sprouts.
We observed as follows.
1. A number of sprouts seems to be alike and indifferent of whether a size or a height of stump is large or small. A length of sprouts is alike, regardless of a size or a height of a stump, and also nearly the same at any position in a stump.
2. The more increases D. B. H. of a old sprout to be cut, the more shall stand a number of regenerated sprouts from this cut stump, neverthless, a length of sprout shall not so differ at any cut stump.
We are now coming to an opinion that we may carry on a repeating reproduction in this selection coppice forest, giving a primary ccnsideration to the disposition and the dimension of standing sprouts to be cut, among many factors affecting the crops in this stands.