50%噻苯隆在棉田的应用效果及气候因素的影响

Studies on 50% Thidiazuron on Leaves Shedding and Boll Open Percentage of Cotton and Influence of Climatic Factor

在棉铃吐絮35%～40%时喷施50%噻苯隆可湿性粉剂,研究其对棉花脱叶和吐絮效果的影响,并对气候因素的影响进行了分析。结果表明:该药剂对棉花具有理想的脱叶效果,用药剂量为150～300g/hm2(有效剂量)时,随用药剂量增加脱叶率提高;该药剂能促进棉铃吐絮,提高霜前花比例;用150～450g/hm2剂量处理,对棉花品质没有影响。温度、日照时数对棉花脱叶速度、脱叶率及吐絮率有一定影响。

Field experiment was conducted to study the effect on shed leaves and boll open percentage on climatic factors and 50% thidiazuron WP spraying in 35% -40% boll open stage of cotton. The results showed that the shed leaves percentage became higher along with the increase of application rate at the rate of 150 - 300 g/hm^2. The thidiazuron could increase boll open percentage. At the rate of 150 -450 g/hm^2, the quality of cotton wasn＇t influenced by thidiazuron. The rate of shed leaves and boll open were influenced by temperature and sunlight hours.