大白菜田间巧管理,是夺取优质高产的关键,在管理中着重抓住“早、好、巧、了”四个字。 一、间苗、定苗要抓“早”。大白菜直播后2～3天需浇一次降温水。出苗6～7天后,开始疏苗,苗距3～5厘米。早疏苗可防止相互遮荫徒长。3～4片真叶时进行二次间苗,苗距以10厘米左右为宜。真叶6～8片时根据品种特性进行定苗。定苗应在中午烈日下进行,此时菜叶发软,在间苗 Clever management of Chinese cabbage field is to seize the key to high quality and high yield, focusing on management to seize the “good morning, good, clever, and” four words. First, Miao Miao, Dingmiao should grasp “early.” Chinese cabbage after 2 to 3 days to be poured once the cooling water. 6 to 7 days after emergence, sparse seedlings began, seedlings from 3 to 5 cm. Early sparse seedlings to prevent shading each other leggy. 3 ~ 4 real leaves when the second seedlings, seedling spacing of about 10 cm is appropriate. True leaves 6 to 8 tablets according to the characteristics of varieties Dingmiao. Dingmiao should be carried out at noon under the hot sun, this time leaves soft, in the seedlings