Oishita cultivation - Oishita cultivation

Japanese: 覆下栽培 - おおいしたさいばい

A cultivation method in which crops are covered to protect them from the cold and light.
[Vegetable cultivation under an oven]
This refers to the cultivation of turnips, radishes, etc. over the winter by covering the north side of the ridges with a single reed paper roof to protect them from the cold, and has been practiced for a long time in the Kanto region. Turnips and radishes are not damaged for a short period of time even if the temperature drops to a few degrees below zero and the cells freeze, so they can be cultivated outdoors over the winter, but they grow faster and the quality of the harvest is better when protected from the cold with a single reed paper roof. However, with the recent spread of plastic film, tunnel cultivation using tunnels has become more common instead of Ohishita cultivation.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

作物を防寒や遮光の目的で覆いをし，その下で行う栽培方法。
［野菜の覆下栽培］
　防寒のためにうねの北側によしずの片屋根をかけて，カブやダイコンなどの越冬栽培を行うことをいい，関東地方で古くから行われている。カブやダイコンは気温が零下数℃に低下して細胞が凍結しても，短時間ならば障害を受けないので，露地でも越冬栽培ができるが，よしずの片屋根で防寒したほうが生長が速く，収穫物の品質もよい。しかし，近年プラスチックフィルムの普及につれ，覆下栽培に代わり，トンネルを利用したトンネル栽培が増えている。

出典　株式会社平凡社世界大百科事典第２版について　情報

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