“上油2号”原名“宁油5号23系”,是上海县莘庄乡种子场汤凤祥于1979年从“宁油5号’冲系统选育而成的甘蓝型早中熟油菜新品种。自1983年起(指收获年)连续三年参加上海市油菜区域试验,表现较突出。它具有耐寒性强、冬春双发、生长稳健、整齐、丰产、稳产等特点。近几年来,“上油2号”推广面积迅速扩大。据统计,1986年“上油2号”夏收面积巳达28.4万亩,占油菜总面积的24.5％,“上油2号”巳被列为上海市“七五”期间重点推广的油菜良种之一。一、产量水平 “Oil on the 2nd,” formerly known as “Ningyou 5 23 Series” is a seedling market in Xinzhuang Township, Shanghai Tang Fengxiang in 1979 from the “Ningyou 5” red system breeding of cabbage early maturing new varieties of rape. Since 1983 (referring to harvest year) for three consecutive years to participate in Shanghai rapeseed area test, the performance is more prominent.It has the characteristics of strong cold hardiness, winter and spring, steady growth, neat, high yield, stable yield.In recent years, According to statistics, in 1986, the area of ​​summer harvesting of “No. 2” reached 284,000 mu, accounting for 24.5% of the total canola area. The “Number 2” of oil was listed as “ During the ”Seventh Five-Year" period, one of the key rapeseed varieties is popularized