棉花从出苗到现蕾的一段时间,称为苗期。同一品种,苗期的长短,因播种期的早迟与田间管理的好坏而有不同,如播种期偏早,苗期的土温和气温偏低,则苗期相应增长,反之,播种期偏迟,苗期的土温和气温偏高,则苗期相应缩短;在同一播种期内如管理得好,苗期相应缩短,反之,如管理不当,则苗期相应增长,从汉阳棉区的情况 Cotton from emergence to budding period of time, known as the seedling stage. The same species, seedling length, due to the early and late sowing and field management is good or bad, such as sowing earlier, the soil temperature and seedling temperature is low, the corresponding increase in seedling stage, on the contrary, the sowing period Late and seedling soil temperatures and high temperatures, the corresponding shortened seedling; in the same sowing period, such as well managed, the corresponding shortened seedling stage, on the contrary, if not properly managed, the corresponding increase in seedling stage, from Hanyang cotton area situation