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应用大白菜自交不亲和系配制一代杂交种 ,在隔离区内花期投放适量的蜂群授粉 ,是提高大白菜杂交制种产量与质量的关键措施。试验证明 :配制大白菜杂交种花期田间蜂群数量的多少 ,直接关系蜂群在田间的稳定性 ;蜂群不足 ,会影响授粉的效果 ,导致产量和质量的严重下降 ;蜂群拥挤 ,会使花粉源不足 ,蜜蜂远飞采粉 ,将隔离区外的杂粉带入制种区内造成混杂。一般长势中等的制种地块每 2亩配置一箱强盛蜂群 ,长势旺盛的制种地块每亩配置一箱强盛蜂群比较合理
It is a key measure to improve the yield and quality of Chinese cabbage hybrid seed by applying the first-generation hybrids with Chinese cabbage self-incompatibility and the proper pollination of pollination during flowering in isolation areas. The results showed that the number of bee colony in the field of Chinese cabbage hybrids was directly related to the stability of bee colony in the field. The lack of colony would affect the pollination effect and lead to the serious decrease of yield and quality. Inadequate pollen sources, bees far fly picking powder, the quarantine outside the impurity into the seed production area causing mixed. The average growth of medium-sized plots of 2 acres of configuration of a box of strong bee colony, growing plots of seedlings per acre allocation of strong bee colony more reasonable