中甘12甘蓝,是中国农科院蔬菜研究所继报春、中甘11之后,又配制成功的一个早熟甘蓝一代杂交种。几年来经各地试验结果,平均亩产3452公斤,比中甘11增产20％以上。据我所1991年品种对比试验,增产效果十分明显,中甘12亩产3779公斤,比中甘11亩产2890公斤增产30％。并在播期试验中证明,中甘12最可贵的一个特点,就是冬性比其他品种都强,不易先期抽薹。如在12月1日播种的抽薹率仅占13.3％,而中甘11则多达33.4％。中甘12在12月21日以后播种的均无抽薹现象,而中甘11必须将播种期推迟到12月21日以后才比较安全。中甘12的植株开展度40～45厘米,外叶13～15 Chinese cabbage 12 cabbage, is the Chinese Academy of Agricultural Sciences Institute of Vegetables following the spring, after the Gan 11, but also the preparation of a successful early generation of cabbage generation hybrids. Over the past few years the test results around the average yield of 3452 kilograms, more than 20% increase in Zhong Gan 11. According to my 1991 variety comparison test, the effect of increasing production is very obvious. The output of 12,700 kg of Zhongmu 12 mu is 30% higher than that of the 2890 kg of 11 mu of Zhonggan. And in the sowing date test proved that the most valuable characteristic of Zhonggan 12 is that winter is stronger than other varieties and is not easy to be pre-bolted. As of December 1, the bolting rate was only 13.3%, while that of Zhongkan 11 was as much as 33.4%. There was no bolting in Zhongkan 12 after sowing on December 21, while Zhongkan 11 had to delay sowing until after December 21. In Gan 12 plant development degree of 40 to 45 cm, the outer leaves 13 to 15