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一、麦、稻、豆三熟制的演变及其评价 旧街地区位于湖北省新洲县东北部,属平缓丘陵区,气候温和,雨量充沛,年平均气温16.8℃,无霜期245天,常年降雨量1215毫米,人多地少,适宜发展一年三熟制。历史上以麦、稻、豆和油、稻、豆一年三熟制为主,约占水田面积75％上下;其中小麦、中稻、泥豆占45％左右,油菜、中稻、泥豆占30％左右,实行麦、油轮换种植。近
First, the evolution of wheat, rice, beans, three-cooked system and evaluation of Old Street area is located in the northeast of Xinzhou County, Hubei Province, is a gentle hilly region, mild climate, abundant rainfall, the annual average temperature of 16.8 ℃, frost-free period of 245 days, perennial rainfall The amount of 1215 mm, less people, suitable for the development of three systems a year. The history of wheat, rice, beans and oil, rice, beans cooked three times a year, accounting for about 75% of paddy fields up and down; of which wheat, medium rice, mud beans accounted for about 45%, rape, medium rice, mud beans accounted for 30 About%, the implementation of wheat, oil for planting. near