@article{oai:kpu.repo.nii.ac.jp:00004907,
 author = {本城, 尚正 and Honjyo, Takaaki},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Oct},
 note = {スギ育林学上の重要な問題は優良個体の増殖である。増殖方法は種子による増殖とクローンによる繁殖の二つがあるが, 優良木のほとんどは老齢のものが多く, 一般には結実量が少なく, またさし木による発根が困難で増殖の大きな障害となっている。したがってこの問題を解決する一手段として, まずつぎ木を行ないそれを利用することによって, さし木の発根能力の向上をはかることを目的として, 1960年以来本研究に従事してきた。つぎ木は林木増殖の有効な手段としてきわめて重要な位置をしめているにもかかわらず, 部分的な現象のみが強調され, 総合して確立されたものではなかった。この研究は, まずスギのつぎ木によるゆ合現象を形態学的, 生理学的な面から明らかにし, 早期ゆ合と早期生長に対してもっとも適切と思われるつぎ木方法を確立させ, さらに品種間の親和性からつぎ木材料を検討し, そしてつぎ木をくり返すことによって発根能力をどの程度高められるかを総合的に究明しようとしたものである。, Some reasons why there are difficulties in propagating SUGI (Cryptomeria japonica D. Don), are because most of the superior seed trees are old so that they generally don't bear a good many seeds and we can't expect a good rooting on cuttings, either. As one of the efficient steps to solve these problems, this research started in 1960 to increase the rooting ability of cuttings, using clone of the seed tree which had been grafted once before. This paper deals with the synthetical study of the technical method and various conditions to get an optimum result for grafting trees. 1) Six different types of grafting, (Cleft-Grafting, Wrinkle-Grafting, Bark-Grafting, Veneer-Grafting, Side-Grafting and Inarching-Grafting) which was considered to be effective for the purpose of this research, were used and the propriety of these steps were investigated. Consequently, the Cleft-Grafting method showed the best record in the survival percentage and the growth of the scion after grafting. Soft X-ray photograph of the coalescent condition of the grafted part also showed the same result. 2) To find out the necessary and the sufficent condition for the survival of scion, relation between the growth of the callus and these factors such as moisture content, transpiration and suction amount of the scion and the water movement traced by P^<32> were investigated and it was considered that 2-3 weeks after grafting were the most important period for survival so that successful grafting depend on how to care the tree on that period. It was presumed to be the optimum condition for grafting to control the environment as the temperature around 25℃, the humidity above 70%, and the relative illumination around 50%. 3) High survival percentage and the maximum growth of scion after grafting was generally obtained when the scion was taken from the young seed tree under 50 years of age or from the lately grown part of the old mother tree and cut it into 5 to 10cm long and prune the lateral branches of the scion into 50% length. Latest grown part of the 2-3 years old seedling plant about 30 to 70cm height was found to be the best kind of stock when 30% of total length of the lateral branches were pruned from the top or 50% of each branches were pruned. Besides that, it was recognized that the lateral branches of the stock were indispensable on and after the second year after grafting. 4) Generally speaking, compatibility between the scion and the stock was always at issue but among 12 varieties which were used in this research, these four such as Sanbu-Sugi, Yanase-Sugi, Yaku-Sugi and Yamaguni-Sugi, which had wide insertion angle, made bigger growth in height whether they were used as scions or as stocks. This was due to the differences of the photosynthetic amount. 5) It was proved when the scion was taken from the old seed tree which was about 200 years of age, rooting percentage was only 10% but if the scion was taken from the branch which had been grafted once before, rooting rate became high, up to 50%. However, this was also pointed out that these grafting and cuttings combination was useful only for the first time and it was no use doing it over again to make the rooting percentage much igher.},
 pages = {89--141},
 title = {スギ苗のつぎ木増殖に関する基礎的研究(林学部門)},
 volume = {24},
 year = {1972},
 yomi = {ホンジョウ, タカアキ}
}