棉花一生概述棉花原产亚热带,是一种多年生短日照作物。在劳动人民长期培育下,逐渐北移到温带,成为一年生作物,春季播种,当年开花结实,到冬季严寒来临时,生命终止,便完成了它的整个生育周期。棉花的一生,可分为四个时期。即:苗期、蕾期、开花结铃期和成熟吐絮期。目前大面积栽培的陆地棉品种,全生育期为135天左右。棉花现蕾以前为营养生长期,此时主要是生长根、茎、叶等营养器官。现蕾以后,进入营养器官生长和蕾、花、铃等生殖 Cotton Life Overview Cotton native subtropical, is a perennial short daylight crop. Under the long-term cultivation of the working people, they gradually moved northward to the temperate zone, becoming annual crops. They were planted in the spring and were strong in that year. When the cold winter came, the end of life was completed and its entire growth cycle was completed. Cotton’s life, can be divided into four periods. Namely: seedling stage, bud stage, flowering bolls and mature boll boll stage. At present, a large area cultivated Upland cotton varieties, the whole growth period of about 135 days. Cotton budding before the vegetative growth period, this time is mainly the growth of roots, stems, leaves and other vegetative organs. After budding, into vegetative organs and buds, flowers, bell reproduction