牛皮菜耐寒性强、生长快,是冬、春季节中的一种良好青饲料作物。由于来源不同,各个牛皮菜品种的耐寒性和生长、再生长速度,以及抽苔期早晚都有明显差异。这些差异都对利用期的长短、季节产量和总产量有直接影响。为了弄清这个问题,以合理利用各个牛皮菜品种,1976年秋至1977年春我们对来自成都、四川(广西畜牧所供种)、湖南、江苏的四个牛皮菜品种进行了比较试 Cold hardy cabbage and rapid growth, winter, spring is a good green fodder crops. Due to different sources, the cold tolerance and growth of all varieties of Brassica campestris, regrowth speed, and bolting period have obvious differences. These differences have a direct impact on the length of use, seasonal yield and total output. In order to clarify this issue and make rational use of various cultivars of Brassica campestris, we compared the four cultivars of Brassica campestris from Chengdu and Sichuan (for the supply of livestock farms in Guangxi), Hunan and Jiangsu in the autumn of 1976 to the spring of 1977