大白菜F_1代杂交制种花期需要蜜蜂等昆虫传粉,才能提高杂交结实率。而莱州市大白菜制种盛花后期(5月20日前)正是刺槐开花期,蜜蜂对刺槐花趋化性强,此时不在大白菜上传粉,明显影响了大白菜制种的产量和质量。为此,我们于1988～1991年进行了人工辅助授粉试验,收到了明显的增产效果。试验方法大白菜盛花后期人工辅助授粉是1988～1990 Chinese F1 cabbage F1 generation hybridization need pollination of bees and other insects, in order to improve the rate of hybrid seed set. The early stage of flowering of Chinese cabbage in Laizhou City (before May 20) is the flowering stage of Robinia pseudoacacia, bees on the chemotaxis of Robinia pseudoacacia, at this time not on the Chinese cabbage powder, significantly affected the yield and quality of Chinese cabbage seed. To this end, we carried out artificially assisted pollination experiments from 1988 to 1991, and have received significant stimulation effects. Test methods Chinese cabbage Shenghua late artificial artificial pollination was 1988 ~ 1990