白菜杂交制种,在郑州以北地区,一向采用春播小株制种。产种量低,致使种子价高,影响杂交种的推广,经济效益不理想。从1983年我们开始在藏营试验场探讨大白菜“新杂一号”的秋播制种技术,因种苗不能露地越冬而失败。1984年秋我们又在牛村蔬菜试验场再次试验,获得成功。尽管1984年冬季气温较常年低,但种苗露地越冬 Cabbage hybrid seed production, north of Zhengzhou, has always been the use of spring planting small plant seed. Low production, resulting in high seed prices, affecting the promotion of hybrids, economic benefits are not ideal. From 1983, we started to explore the technique of autumn sowing of Chinese cabbage “Xinza No.1” at the Tibetan Camp Test Ground, failing because the seedlings could not overwinter. In the autumn of 1984, we tried again at Niu Cun vegetable testing ground and succeeded. Although the winter temperatures in 1984 were lower than those in normal years, the seedlings were winter