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上海郊区西部的松江、青浦、金山等县,五十年代初期实行单季晚稻一熟制和麦(油、肥)—稻两熟制并存,五十年代中后期至六十年代中期,随着水利条件的改善,逐步增加了麦类种植面积,形成麦(油、肥)—稻两熟制,六十年代末期开始试行麦(油、肥)—稻一稻三熟制与麦—棉轮作,自七十年代以来,形成以麦(油、肥〕—稻一稻三熟制为主与麦—棉轮作;上海郊区东部的奉、南、川、上、宝等县,五十年代初期实行麦(油、肥)—中籼稻(或早籼稻)两熟制与棉花轮作,五十年代中后期至六十年代中期,进行籼稻改粳稻、中稻改晚稻的品种改革,六十年代后期以来,
In the early 1950s, the single-season late rice-one-cropping system and wheat (oil and fat) -two rice double-cropping system coexisted. From the mid-late 1950s to the mid-1960s, along with counties of Songjiang, Qingpu and Jinshan in the suburbs of Shanghai, Improvement of water conservancy conditions, and gradually increase the area planted with wheat, the formation of wheat (oil, fertilizer) - rice two cooked system, the late sixties trial began wheat (oil and fat) - rice and rice three cooked and wheat - cotton rotation , Since the seventies, wheat (oil, fertilizer) - a rice-rice three-cooked system and wheat - cotton rotation; the eastern suburbs of Shanghai Fengnan, Sichuan, Shangbao county, the early 1950s Implementation of wheat (oil, fertilizer) - indica rice (or early indica rice) two ripening and cotton rotation, the mid-late fifties to the mid-sixties, the indica rice to change late rice, late rice varieties of reform, from the late sixties ,