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我国解放以来,油菜面积发展速度较快,以1949年为基数(2273万亩),50和60年代分别扩大了27.7％和13.6％,70和80年代分别扩大了38.2％和145.5％;同期世界其他国家(不含我国)油菜面积分别减少10.0％、19.1％和增加60.0％、62.3％。我国油菜平均亩产提高较慢,以1949年为基数(32.5kg),50和60年代分别降低4.6％和1.5％,70和
Since the liberation of our country, the rapeseed area has been developing at a rapid rate, taking 1949 as the base (22.73 million mu), expanding by 27.7% and 13.6% respectively in the 1950s and 1960s and by 38.2% and 145.5% respectively in the 1970s and 1980s. In the same period, Other countries (excluding China) decreased rapeseed area by 10.0%, 19.1% and 60.0% and 62.3% respectively. The average yield per mu of rape in our country increased slowly, taking 1949 as the base (32.5kg), decreasing 4.6% and 1.5% respectively in the 50s and 60s,