在我国北方地区大白菜种植面积约占全年蔬菜种植面积的三分之一左右。但是,由于大白菜是典型的异花授粉作物,目前人们对适宜授粉季节的环境条件掌握不准,品种培育和良种繁育及生产均受到严重影响。针对这一问题,我们对大自菜适宜授粉时间及温度做了三年的探讨。现简结于后: In northern China, the planting area of ​​Chinese cabbage accounts for about one-third of the annual vegetable planting area. However, since Chinese cabbage is a typical cross-pollinated crop, people are currently not allowed to control the environmental conditions suitable for the pollination season. The cultivation of varieties and the breeding and production of breeding seeds are seriously affected. In response to this issue, we have done three years of research on the suitable pollination time and temperature for growing vegetables. Now concludes: