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棉花开花结铃期间,在人工控制条件下,经同位素~(14)C示踪,当≥33℃高温持续5天以上时,将使五天铃龄的棉铃秕子数增加,纤维重量减轻,从而使子棉重量降低15.7％。10天铃龄的棉铃所受的影响较五天铃龄的轻。高温期间棉田灌水或喷水,有利于~(14)C同化产物向幼铃输送,可减轻高温对棉铃生长发育的影响。在田间小区试验中,可使单铃子棉重量比对照增加7.9％,结铃数增加6.2％。喷洒长风3号抑蒸剂防御高温亦有一定效果。
Cotton flowering bolls, under artificial control conditions, isotope ~ (14) C tracer, when ≥ 33 ℃ high temperature for more than 5 days, will make five-day boll bolls boll number increased, fiber weight loss, Thus reducing the weight of cotton seed 15.7%. The effects of 10 days of bolls of cotton bolls are lighter than those of 5 days of bolls. Irrigation or sprinkling of cotton field during high temperature is beneficial to the transfer of ~ (14) C assimilation product to young bell, which can reduce the effect of high temperature on the growth and development of boll. Field trials in the field, you can make single boll cotton weight increased 7.9% compared with the control, the number of bolls increased by 6.2%. Changfeng spray No. 3 steaming agent to prevent high temperatures also have some effect.