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一、大白菜采种的重要性及试验目的大白菜是我国原产,为群众所喜食的高产蔬菜。栽培区域至为广阔,北方是我国大白菜的主要产区,山东尤为有名,年产量达数十亿斤,除本省食用外大量运销外地。近年以来,由于人民生活水平提高大白菜已扩展至南方各省,浙江、江苏、福建、四川及贵州等省均有大面积的栽培。因而种子需要量骤增,遂使大白菜采种成为蔬菜生产中的一个重要问题。采用包球坚实的大白菜作种株采种,是生产实践中最常用的采种方法,但是由于病害严重,软腐病及霜霉病交互发生,在管理不当时,病害率常达80％,甚或颗粒无收,因此每年
First, the importance of Chinese cabbage seeds and test purposes Chinese cabbage is China’s origin, for the masses like to eat high-yield vegetables. Cultivation area is vast, the north is the main producing areas of Chinese cabbage, Shandong is particularly famous, the annual output of billions of jins, in addition to a large number of foreign food sales in the field. In recent years, due to the improvement of people’s living standards Chinese cabbage has been extended to all provinces in the south, Zhejiang, Jiangsu, Fujian, Sichuan and Guizhou provinces have large-scale cultivation. Therefore, the sharp increase in the demand for seeds, so that Chinese cabbage seed production has become an important issue in vegetable production. The adoption of solid domestication of Chinese cabbage for seed production is the most commonly used method of seed production in production practice. However, due to serious disease, soft rot and downy mildew occur interactively, and when management is not proper, the disease rate often reaches 80%, or even No crop, so every year