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1 材料与方法本实验从多个大白菜品种中选取了6份具有代表性的品种。详见表1。2 试验方法2.1 不同品种大白菜苗期耐低温的田间鉴定选用表1中的品种为试材,4月10日田间播种,每品种设3次重复,然后进行田间苗期耐低温试验。根据所得性状平均值(株高、鲜重)来鉴定品种的耐低温的强弱。2.2 大白菜种子低温发芽能力的鉴定将表1的6份试材种子分别在5℃、10℃、15℃、25℃的条件下进行发芽试验。每个品种设3次重复,3d计算发芽势,7d计算发芽率。
1 Materials and Methods This experiment from a number of Chinese cabbage varieties selected 6 representative varieties. Details are shown in Table 1.2 Test Method 2.1 field identification of different varieties of cabbage seedling low temperature field selection of the varieties in Table 1 as the test material, April 10 sowing in the field, each set three replications, and then field seedling tolerance Low temperature test. According to the average of the traits (plant height, fresh weight) to identify the variety of low temperature resistance. 2.2 identification of Chinese cabbage seed germination at low temperature Table 6 of the test material seeds were 5 ℃, 10 ℃, 15 ℃, 25 ℃ under the conditions of germination test. Each breed set 3 times repeated, 3d calculated germination potential, 7d calculated germination rate.