北疆机采棉化学打顶技术与气象条件特征探讨

Discussion on the Characteristics of Chemical Topping Technology and Meteorological Conditionsfor Mechanical Cotton Harvesting in Northern Xinjiang

通过研究北疆石河子地区机采棉合理喷施化学打顶整枝剂技术,特别是针对棉花喷施化学打顶剂前后的温度、降水等气象条件对打顶效果的影响。结果表明:喷施化学打顶剂省工省时、成本低、棉株快速塑形和抑制主茎顶部和果枝顶部生长、提高了成铃率,同时减少了人工打顶造成顶部的损伤。新疆北部地区以6月中下旬根据天气条件用“安定封”90 g/hm^2和180 g/hm^2分两次喷施较好。

This paper studied the reasonable spraying of chemical topping agent for mechanical cotton picking in Shihezi area in northern Xinjiang,especially the influence of temperature,precipitation and other meteorological conditions before and after the spraying of chemical topping agent on topping effect.The results showed that chemical topping agent could save labor and time,reduce cost,shape cotton plant quickly,inhibit the growth of the top of main stem and fruit branch,improve the boll rate,and reduce the damage of the top caused by manual topping.It was better to spray 90 g/hm^2 and 180 g/hm^2 in northern Xinjiang in the middle and late of June according to the weather conditions.