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天正夏白1号、夏白2号是山东省农科院蔬菜所承担国家“九五”科技攻关项目期间育成的夏季专用大白菜新品种。夏白2号于2002年3月通过山东省农作物品种审定委员会审定。一、品种特征特性 1.天正夏白1号株高34 cm,开展度为40 cm×40 cm,白帮,叶色绿,叶球卵圆形。单球重1～1.5 kg,净菜率64.5%,软叶率60.7%,品质佳。生长期50～55天。2001年省级区域试验结果,666.7 m~2产净菜4 500kg左右,比对照品种鲁白13号增产52.9%。田间表现抗病毒病、霜霉病和软腐病,三者的病情指数分别为0.0、6.4、4.3,达到国家统一抗病级水平。 2.天正夏白2号株高30 cm,开展度
Tianzheng Xiabai 1 and Xiabai 2 are summer special cabbage cultivars cultivated during the “95” scientific and technological project of Shandong Academy of Agricultural Sciences. Xiabai 2 passed the approval of Shandong Crop Variety Approval Committee in March 2002. First, the characteristics of the characteristics of varieties 1. Tianzheng Xiabai No. 1 plant height of 34 cm, the development of 40 cm × 40 cm, white gang, leaf green, leaf ovoid. Single ball weight 1 ~ 1.5 kg, net vegetable rate of 64.5%, soft leaf rate of 60.7%, good quality. Growth period of 50 to 55 days. In 2001, the results of the provincial level test showed that the net food yield of 666.7 m ~ 2 was about 4 500 kg, an increase of 52.9% over the control variety Lu Bai 13. Field performance of antiviral, downy mildew and soft rot disease, the three disease index were 0.0,6.4,4.3, reaching the level of national unity disease resistance. 2. Tianzheng summer white 2 plant height of 30 cm, the degree