福岡県農業総合試験場研究報告14（1995） pp 61 - 63
ナスの３年栽培における主枝本数，台木品種が収量・品質に及ぼす影響
小野剛士・山本幸彦・豆塚茂実・月時和隆
長ナスの周年生産を目的として，促成栽培収穫終了時に更新せん定し３年間栽培を行い，主枝本数，台木の種類が収量，品質に及ぼす影響について明らかにした。収量は，２本仕立てが４本仕立てよりも多く，台木についてみると，ヒラナス台がトルバム台よりも多かった。年間の総収量は，２年次において最大となり，３年次の収量は初年次よりも低下した。収穫果実の上中物率は，２年次までは初年次とほとんど変わらず約６０％であったが，３年次は，著しく低下した。不良果の発生は，年次を追うごとに増加したが，主枝本数，台木品種間の差はみられなかった。不良果の中でも，特に首細果は２年次の１２月以降多くなった。以上のことから，従来の促成栽培の収穫期間を延長して収穫する場合は，ヒラナスを台木として主枝を２本仕立てにし，２年次の年内まで収穫することが適当であることが明らかとなった。
［キーワード：ナス，更新せん定，促成栽培，台木品種，主枝本数］
Effects of Primary Scaffold Branch Number and Root Stock Variety on Yield and Quality of Eggplants During the Three Years Culture. ONO Takashi, Yukihiko YAMAMOTO, Sigemi MAMETSUKA and Kazutaka TSUKIJI (Fukuoka Agric. Res. Cent. , Chikushino, Fukuoka 818, Japan) Bull. Fukuoha Agic.
Res. Cent. 14 : 61-63 (1995)
The effects of primary scaffold branch number and root stock varieties on yield and quality of egg plants in forcing culture were investigated. In this experiment,plants prunned for renovation after the last yield were cultured every year. Yields of plants with 2 branchs were higher than plants with 4 branchs every year during three years. Yields of plants with 'HIRANASU' were higher than plants with Toruvam. In all treatments, the yield of the second year was highest among three years culture, the yield of the third year was lower than that of the first year. The ratio of high and mid quality friuts was about 60% through two years, but that in the third year remarkably decreased, the number of bad shaped friuts increased year after year. This tendency was the same within all treatments. And the slim-neck shaped fruits increased after December in the second year. In conclusion that plants with 2 branchs on 'HIRANASU' was suitable for the culture extended after the last yield of forcing culture, and harvest time was recommended from August to December in the second year.
[Key words : Eggplant, Renovation-pruning, Forcing culture , Root stock variety, Branch number]
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