万全县引种早熟白菜“丰白５４２”成功杨秀军万全县孔家庄镇政府农技办公室　０７６２５０早熟“丰白５４２”杂交白菜是１９８９年北京农作物品种审定委员会审定的一个新品种。１９９０年引进我镇试种，现已成为早熟白菜的当家品种。该品种在我区一般生长期５５—６０天... Wanquan County introduced the success of “Fengbai 542” precocious cabbage Yang Xiujun Office of Agricultural Science and Technology, Kongjiazhuang Town, Wanquan County 076250 Early-maturing “Feng-bao 542” hybrid cabbage is a new variety approved by the Beijing Crop Variety Approval Committee in 1989. Introduced in my town in 1990 trial, has now become the ripe varieties of cabbage. The species in my area general growth period 55-60 days ...