群馬県利根地方におけるりんごの開花期に関する生態的研究   :   Ecological Studies of Flowering Time of Apple in Tone District. 

作成者 永沢, 勝雄, 佐藤, 三郎
作成者 (ヨミ) サトウ, サブロウ
作成者の別表記 NAGASAWA, Katsuo, SATO, Saburo
日本十進分類法 (NDC) 625
内容 1)りんごの開花期について詳細な知見をもつことは, 各種の管理を合理的に実施する上に重要と考えられるので, 本学利根農場を中心とし, 群馬県利根郡下の主産地につき, その生態的観察を行った.2)利根農場は海抜650〜750m, 年平均気温10.3℃, 年降水量1, 200mm内外, 土壤は榛名火山系浮石質土で, りんご栽培に好適すると考えられる.3)3月の気温はその年のりんごの開花期に関係し, 高温な場合に早く開花する.4)標高と開花期との間には一定の関係があり, x=at+r(x:開花期, a:標高, r:1月1日から開花日までの日数)によって表わすことができる.標高100m高くなるにつれて, 祝は2.35日, 旭2.25日, 紅玉2.5日, ゴールデンデリシャス2.36日, 国光1.63日のおくれを示している.5)枝の種類によって開花期に差があり, ゴールデンデリシャスは差を認めがたいが, 他の品種では短果枝が早く開花し, 開花期間も短かい.6)大きい花芽の花は早く開花し, 貧弱な花芽の花はおそく, しかも開花期間が長い.7)沼田地方のりんご栽培では霜害防止に留意する必要がある.
It seems to be very important probem to have particular knowledge of the ecological variation on the flowering time of apple tree in order to carry out the various cultural practices, so we did the ecological observations of the apple trees in several chief places located in Tone District of Gumma Prefecture, especially Tone-high land farm which belongs to our Faculty of Chiba University. Results of study were summarized as follows. 1) Tone-high land farm is located 650〜750 meters above the sea level. The anual mean temperature is about 10℃, and the precipitation is about 1, 200mm. Soil consits of loam with gravel which is organized by Haruna volcano zone. Therefore, that district seems to be suitable for the economical culture of apple tree. 2) The temperture of March effects to the flowering time of apple in that year. When the temperature is high in that month, the apple flower opens earlier than usual. 3) There exists close relation between flowering time of apple and the latitude. The relation is shown by such a formula; x=at+k x: flowernig time, a: sea level (m) k: total days from 1st of Jan. Iwai (American Summer Pearmaiin): x=0.02353a+107 Asahi (McIntosh Red): x=0.0225a+110 Kogyoku (Jonathan): x=0.025a+110 Golden Delicious: x=0.0236a+109.5 Kokko(Rails): x=0.0163a+122 4) The flowering time of apple differs according to the kinds of branches. We can scarecely find it in Golden Delicious, but in others, short bearing branches come into bloom earlier than other branches, besides the duration of the flowering time is short. 5) The size of fruit bud of apple tree is various, and the flower introduced from large bud comes into bloom earlier than small one, and the flower of poor bud comes later than vigorous one, moreover duration of that is quite long. 6) As we found a case of frost damage at the flowering time of apple at Numata District, we should be careful about the protection against the damage of frost.

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.6 page.97-104 (19581230)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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