不織布ポット栽植によるフェザーの多発した1年生リンゴわい性台木苗の育成(繁殖・育苗)  [in Japanese] A Method of Raising One-year-old Well-feathered Apple Trees on Dwarfing Rootstocks Planted in Non-Woven Fabric Pots(Propagation & Transplant Production)  [in Japanese]

リンゴ'ふじ','秋田紅あかり'とわい性台木'JM7','M.9/マルバカイドウ','M.26/マルバカイドウ'を用い,接ぎ木当年にフェザーの多発した1年生リンゴわい性台木苗を育成しよぅとした.不織布ポットとBAを利用した育苗法によりフェザーの多発した生育の優れる1年生苗木を得られることが明らかとなった.また,不織布ポット栽植の苗木は接ぎ木時期によって新梢長,幹周,フェザー総長,フェザー平均長に差が生じ,接ぎ木時期が早いほど生育が優れた.温室を用いた2月と3月接ぎ木区では,BA処理により'ふじ'で10〜15本,'秋田紅あかり'で5〜13本のフェザー発生苗が育成できた.これらのことから,本実験のリンゴわい性台木苗育苗法により,フェザーが10〜15本発生した1年生リンゴわい性台木苗を育成できることを実証した.

To establish a method of raising one-year-old well-feathered apple trees, 'Fuji' and 'Akitabeniakari' were grafted on JM7, M.9 and M.26 rootstocks or interstems planted in 17 liter volume of non-woven fabric pots. Three different grafting times (February and March in a greenhouse, April in open field) were compared. Shoots were sprayed one to three times with 6-Benzyladenine (BA, 300 or 600 ppm) to induce feathering. Shoot growth, stem girth, total and average feather length of trees grafted in the early season (February and March) showed greater values than those grafted in the later season. Feathering from new shoots was favorable in all grafting time plots, regardless of the number of treatments or concentration of BA. Ten to fifteen feathers grew from the axillary buds of the shoot of 'Fuji', five to thirteen feathers grew from 'Akitabeniakari'. It was shown that one-year-old well-feathered trees could be raised by grafting apple varieties on dwarfing rootstocks or interstems planted in non-woven fabric pots in the greenhouse in February or March with later application of BA to growing shoots.