摘要
通过观测夏季温室不同灌溉条件下草皮的冠层温度、气温、大气湿度以及土壤含水量等因素,利用Isdo经验模式确定了冠气温差的下限方程。通过观察不同水分处理条件下草皮CWSI的日变化,得出了利用CWSI诊断草皮水分状况的最佳时机。研究分析了作物水分胁迫指数与其他一些反映作物水分状况的指标,包括土壤含水量、叶片蒸腾速率以及叶片含水量之间的关系,CWSI验理论模式与上述这些指标关系良好,表明其很好地反映了作物的水分胁迫特征。
Through measuring canopy temperature, air temperature, humidity and soil water content under different irrigation condition in greenhouse in summer, the lower limit equation for canopy temperature is confirmed through the experiential Isdo mode. By observing the day variation of CWSI under different water treatment conditions, the best time to diagnose the water conditions of the lawn is gained. The relationship between CWSI and other parameters, which can reflect the water content condition, including soil moisture, leaf transpiration, and leaf water potential, is analyzed. The close correlation between them shows that the experimental CWSI is a good indicator for water stress of crop.
出处
《节水灌溉》
北大核心
2008年第8期29-31,共3页
Water Saving Irrigation
基金
江苏省农业基金资助项目:丘陵地区经济作物节水关键技术及设备研制(BE2005316)
关键词
冠气温差
土壤含水量
水分胁迫指数(CwSD
canopy-ambient difference in temperature
soil water content
crop water stress index （CWSI）
