进入8月份后,北方棉区往往降雨偏多,雨量偏大,如9月上旬持续阴天。大部分棉田出现僵桃僵瓣,部分棉田贪青晚熟。针对棉田不同生长状况,促早熟、防早衰多措并举,对提高棉花产量尤为重要。一、促早熟视棉田长势选贪青晚熟、后发性较强的棉田,最好80%以上的棉铃,铃期在40—45天的晚熟棉田,采用40%乙烯利催熟;可使棉花提早吐 After entering August, the northern cotton area tends to have heavy rainfall and heavy rainfall, such as continued cloudy in early September. Most stiff martial petals appeared in cotton fields, some cotton fields greedy late maturing. In view of the different growth conditions in cotton fields, promoting precocious puberty and preventing premature senility are both important measures to increase cotton yield. First, as soon as possible familiar with the growing cotton field Select late blooming, late strong cotton fields, preferably more than 80% of the bolls, bolls in 40-45 days of late-ripening cotton fields, the use of 40% ethephon ripening; cotton Early spit