戦前まで房総半島北部でおこなわれた湿田農法に関する立地生態的分析 Locational and Ecological Analysis Regarding the Ill-Drained Paddy Farming System That Had Been Practiced until the Prewar Period in the Northern Part of Boso

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房総半島北部の下総地方で, 近世から昭和戦前期までみられた湿田農法について検討した. 江戸期の下総地方の湿田では, 唐籾とよばれたインド型赤米が広範に摘田(つみた)という湛水直播法により栽培された. 栽培された水田は, たいとう土とよばれた黒泥・泥炭土壌の強湿田であった. この強湿田で日本型水稲を移植栽培すると, 夏・秋落ちして生育が著しく抑制された. 湛水直播栽培は, わずかに広がる土壌表層の酸化的条件を利用した栽培法であり, これに唐籾の草型特性が結びついた. これより湿田の程度がやや軽い下総地方の夏・秋落ち田では, 昭和戦前期まで小苗・密植栽培が行われた. 小苗・密植栽培は排水不良・生育制御が困難な湿田で穂数を確保するための栽培法であった. 土地改良の遅れた下総地方では戦前まで湿田農法が残った.

I discussed the ill-drained paddy farming system that was used from the modern age until the prewar Showa era in the northern part of Boso Peninsula. In ill-drained paddy field in Shimousa district during the Edo era, the Indica-type rice called Tomomi was broadly cultivated by "Tsumita" (direct sowing in a flooded paddy). Tomomi was cultivated in a heavy ill-drained paddy field of muck soil/peat soil called "Taito-tsuchi". When Japonica-type rice was cultivated by transplanting in "Taito-tsuchi" paddy, its growth was significantly restrained to result in heavy "natsuochi/akiochi". Direct sowing in a flooded paddy is a cultivation method utilizing the oxidative surface soil layer. The cultivation method was related to the plant type of Tomomi. In paddy field where "natsuochi/akiochi" was moderate, dense planting of small seedlings was performed until the pre-war Showa era. Dense planting of small seedlings was a cultivation method to secure the number of ears in ill-drained paddy fields where drainage and growth control were difficult. The ill-drained paddy farming system remained until the prewar period in the Shimousa district where land improvement had been delayed.

収録刊行物

  • 日本作物學會紀事

    日本作物學會紀事 77(3), 288-298, 2008-07-05

    日本作物學會

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各種コード

  • NII論文ID(NAID)
    110006792300
  • NII書誌ID(NCID)
    AN00189888
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00111848
  • NDL 記事登録ID
    9574762
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産)
  • NDL 請求記号
    Z18-342
  • DOI
    10.1626/jcs.77.288
  • データ提供元
    CJP書誌  NDL  NII-ELS  J-STAGE  JASI 
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