新疆机采棉花实现叶片快速脱落需要的温度条件

田景山,张煦怡,张丽娜,徐守振,祁炳琴,随龙龙,张鹏鹏,杨延龙,张旺锋,勾玲

Temperatures of promoting rapid leaf abscission of cotton in Xinjiang region

Jing-Shan TIAN,Xu-Yi ZHANG,Li-Na ZHANG,Shou-Zhen XU,Bing-Qin QI,Long-Long SUI,Peng-Peng ZHANG,Yan-Long YANG,Wang-Feng ZHANG,Ling GOU

表3 喷施脱叶催熟剂后(7.0±1.0) d内实现>55%叶片脱叶速率所需要的温度条件

Table 3 Description of maximum temperature, growing degree days baseline 12°C and minimum temperature for producing more than 55% leaf abscission rate within (7.0±1.0) days after defoliant application

项目 Item 叶片脱落率 Leaf abscission rate > 55% > 60% > 65% 最高温度Maximum temperature (°C) 27.2 28.2 29.2 每日≥12°C有效积温GDD baseline 12 °C (°C day) 7.0 8.3 9.6 最低温度Minimum temperature (°C) 10.8 12.4 13.9