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五、苗期管理苗期管理的核心是浇水降地温、保全苗、护根系、促壮苗。大白菜播种期和苗期正处在伏天高温阶段,特别是7月份干旱的年份,播后和苗期浇水降地温,保护根系正常发育,是培育壮苗的关键所在,在播种后24小时之内浇一次水,幼芽微露浇第二次水,幼苗出齐浇第三次水,间苗时浇第四次水,定苗时浇第五次水,连续浇水,保持幼苗阶段地温降低
Five, seedling management Seedling management is the core water temperature, preservation of seedlings, protect the root system, and promote strong seedlings. Chinese cabbage sowing and seedling stage is in the high-temperature phase of V day, especially in the dry year of July, sowing and seedling water temperature drop to protect the normal development of the root system is to nurture strong seedlings in the 24 hours after sowing Within a pouring water, sprouting micro-second pouring water, seedlings Qi Qi pour the third water, seedlings when pouring the fourth water, Dingmiao when pouring the fifth water, watering continuously, to maintain the seedling stage to reduce the temperature