长绒棉(海岛棉 Gossypium barbadense L.)纤维细长,品质优良,是高级纺织品必需的品种。目前我国只有少量栽培,远远不能满足工业需要。近年来上海等地区自力更生,推广、发展种植。长绒棉生长期长,一般要140天左右。成熟晚,特别是吐絮成熟期拖得很长,经常到霜后,年底也难收完。碰上播种失时、晚发、施肥不当、气候反常等情况,有些田块甚至延迟到春节前后收花,不少青铃在低温下一直不能正常开裂吐絮,成为“无效铃”。 Long staple cotton (Gossypium barbadense L.) slender fiber, high quality, is an essential textile varieties. At present, only a small amount of cultivation in our country can not meet the industrial needs. In recent years, Shanghai and other regions rely on their own efforts to promote, develop and plant. Long-term growth of long-staple cotton, generally about 140 days. Mature late, especially boll flow maturity dragged a long time, often to the cream, the end is also hard to close. Encountering sowing loss, late, improper fertilization, climate anomalies, etc., some plots and even delayed until the Spring Festival to close the flowers, many blue bell at low temperatures has not been able to crack the mouth opening normal, as “ineffective bell.”