大白菜从出土到包心收获,叶部颜色有4次转绿4次褪黄的变化,这个变化几乎不受天气、土壤和品种的影响,并与发芽期、幼苗期、抽桶期和结球期有节奏地衔接。转绿褪黄的时间和色泽受品种特性、当时气温、光照和土壤肥力水平的影响。一、四绿四黄变化的特点从1975年开始,在大同市南郊区的小南头、寺儿村、西韩岭、落里湾和米庄等大队,对中青麻叶、小青麻叶、玉青、抱头青、 Chinese cabbage from unearthed to the heart of the harvest, leaf color 4 times turn green 4 yellowing changes, the change is almost not affected by the weather, soil and variety, and with the germination, seedling stage, draw bucket and knot The ball period rhythmically convergence. The time and color of greenish yellowing are affected by the variety characteristics, temperature, light and soil fertility at that time. One, four green Four yellow changes in characteristics Since 1975, in the southern suburbs of Datong, Xiaonan head, Temple Village, West Han Ridge, and Bay of Mile Zhuang and other brigade, the green linen, small green linen leaves , Jade green, hold the head green,