不同高梁抗旱品种光合速率及水分利用效率的研究

A Study on photosynthesis rate and water use eficiency of Chinese sorghum culttvars with different drought-resistant specialities

摘要: 研究了不同高粱抗旱品种在水分胁迫条件下光合速率及水分利用效率的日变化。结果表明，抗旱品种(3197B)比不抗旱品种(三尺三)叶片水势高，蒸腾速率低，气孔阻力大．光合速率和水分利用效率高，为抗旱品种选育与旱作栽培提供了科学依据。

Abstract: Two Chinese sorghum cultivars with different drought-resistant specialities are　tested to study the diurnal changes of photosynthesis rate and water use efficiency．The results show that the leave water potential，stomata1 resistance，photosynthesis rate and water use efficiency are higher in 3197B eultivar．And the transpiration rate in 3197B cuhivar is　lower than that in San-Chi-San cuhivar．This provides the background information for crop hreeding and cultivation in arid area．