近几年来,由于不断改进制种技术,使制种单产逐年上升.尤其1987年实现了面积,单产双突破.全省制种面积11.2万亩,比1986年扩大3.33万亩,平均单产首次突破一百公斤大关,达到106.7公斤,比1986年亩增22.2公斤,增长26.3%.虽然成绩不小,但与其他兄弟省相比,还有较大的差距. In recent years, as a result of continuous improvement of seed production techniques, the yield per unit of production has been rising year by year, especially since the area was realized in 1987 with a double breakthrough in yield per unit area. The province’s seed production area is 112,000 mu, an increase of 33,300 mu over 1986, The one-kilogram mark reached 106.7 kilograms, 22.2 kilograms more than the increase in 1986, an increase of 26.3%. Although the result is not small, there is still a big gap compared with other fraternal provinces.