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对包头市14种外来园林树种的光合速率、气孔导度和水分状况测定研究表明:净光合速率水势补偿点和气孔导度变化临界点水势可作为评价树木对水分胁迫适应性的指标。应用净光合速率水势补偿点、气孔导度变化临界点水势、初始失膨点总体渗透势3个耐旱性指标对14个树种进行聚类分析,结果树种可分为5组,耐旱性由强到弱依次为:金山绣线菊;金焰绣线菊、水蜡、金叶复叶槭、金叶山梅花;金叶风箱果、紫叶矮樱、金边复叶槭、花叶复叶槭;金叶裂叶接骨木、紫叶锦带、金叶莸、花叶锦带;红王子锦带。
Studies on photosynthetic rate, stomatal conductance and water status of 14 exotic garden tree species in Baotou showed that the compensation potential of net photosynthetic rate and the critical point of stomatal conductance could be used as indicators to evaluate the adaptability of trees to water stress. The results showed that the tree species could be divided into five groups according to the three waterlogging compensation points, the water potential at net photosynthetic rate, the water potential at the critical point of stomatal conductance, and the overall osmotic potential at the initial water loss point. Strong to weak in turn as follows: Jinshan Melastomataceae; gold flame spirella, water wax, gold leaf compound leaf maple, gold leaf mountain plum; gold leaf bellows fruit, purple leaf dwarf cherry, Phnom Penh compound leaf maple, leaf mosaic leaves Maple; leaf gold elm elm, purple leaf band, gold leaf 莸, mosaic leaf belt; red prince Jin belt.