大白菜杂交制种田应选择排灌方便、较肥沃的中性沙质生茬地块,四周2000米内不能有任何油菜及其他大白菜留种,以防串花影响纯度。一、建苗床在每年的封冻前,选择背风、向阳、有水浇条件、便于管理和定植的地方建好苗床。育苗床要东西向,每亩制种田需苗床 Chinese cabbage hybrid farming system should choose to facilitate irrigation and drainage, more fertile neutral sandy stubble plots, surrounded by 2000 meters can not have any rape and other Chinese cabbage to keep the flowering in order to prevent the impact of purity. First, seedbed In the annual freeze before the choice of leeward, sunny, watering conditions, easy to manage and planting built seedbed. Nursery bed to the east-west, farming system per mu need seedbed