大白菜新品种“北京新四号”和“北京新五号”是我中心最新育成的抗病、丰产、品质优良的晚熟一代杂种。生长期８５－９０天，株形半直立，叶球高桩叠抱，在北京地区于立秋前后播种，１１月初收获，近年在北京试种反映良好，现将其性状简介如下。 北京新四号（ ９７－９）：株 The new Chinese cabbage varieties “Beijing New No. 4” and “Beijing New No. 5” are the late-generation hybrids newly developed by our center which are disease-resistant, high yield and good quality. Growing 85-90 days, the plant-shaped semi-erect, leaf pile of high pile, in the Beijing area before and after planting autumn, harvest in early November, in recent years in Beijing to test good, now the trait is as follows. Beijing New Fourth (97-9): strains