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我国黄淮海区和长江流域棉区,一般年份棉花在8月下旬到9月上旬进入吐絮期。今年由于棉花生育的前、中期,气温偏低,阴雨天较多,造成棉花的播种出苗期、现蕾期、开花期,均比常年推迟6～10天。致使今年大面上棉花的早桃少、晚桃多,预计成熟期将比常年推迟一周以上。棉花成熟期的推迟,会直接影响到棉花的产量和品质。多年的生产实践证明:晚熟棉田,正确喷施乙烯利催熟,不仅可使棉铃提前7～10天吐絮,霜前花率增加9.5%～18.8%,增产6.4%～10.2%,亩增收26～40元,而且还有利于小麦等下茬作物的播种和生长。但如果乙烯利使用不当,不但不增产,反而会造成减产减收。要正确施用乙烯利,必须严格掌握好以下几点:
Huanghuai China and the Yangtze River cotton area, the general year of cotton in late August to early September into the boll opening period. This year due to cotton before and during childbirth, the temperature is low, more rainy days, resulting in cotton sowing seedling, budding, flowering period, postponed 6 to 10 days than usual. As a result, there will be fewer early peaches and more late peaches in cotton this year. The mature period is expected to be delayed by more than one week from the normal year. Postponement of cotton maturation will directly affect the yield and quality of cotton. Years of production practice has proved that the correct application of ethephon ripening in late-maturing cotton fields can not only cause cotton bolls to weep flocs 7 to 10 days in advance, but the flower yield before frost increases 9.5% to 18.8% and the yield increases 6.4% to 10.2% 40 yuan, but also conducive to the next crop of wheat and other crops sowing and growth. However, if ethephon is used improperly, not only it will not increase production, but it will result in a decrease in production and income. To properly use ethephon, we must strictly grasp the following points: