植物生长调节剂对国槐蒸腾耗水的影响

采用BP3400精密天平等仪器对喷施不同浓度（10、20、40 mg/L）“施丰乐”溶液（对照喷施清水）的当年生国槐的实际蒸腾耗水状况进行研究，用压力室法分阶段测定了苗木的叶水势. 结果表明:供试国槐属于低水势忍耐脱水耐旱树种，其叶水势与土壤含水量关系的方程为y = 0.018 2 x2-1.071 3 x+ 16.52（R2= 0.998 7）. 在相同水分条件下，对照苗木的耗水速率比处理过的高10.2%～82.7%. 随着干旱胁迫的发生，对照苗木的叶水势急剧下降，而处理的苗木则维持着较高的叶水势. 从而得出植物生长调节剂“施丰乐”的喷施对减少苗木耗水，延缓苗木干旱起着重要的作用. 

Influence of plant growth regulator on transpiring water consumption of Sophora japonica L

Factual water consumption status of Sophora japonica L.sprayed with different concentrations of plant growth regulator Shifengle" solution including 10,20 and 40 mg/L(water is control) was studied by using BP3400 Precision Balance etc.Leaf water potential was measured using pressure chamber in different phases.It was indicated that S.japonica L.was low_water_potential,dehydration_resisted,drought_resisted species,and the equation of the relation between water potential and soil moisture content was y = 0.018 2 x~2-1.071 3 x 16.52(R~2= 0.998 7).Under the same moisture content conditions,water consumption rate of control was 10.2%(--)82.7% higher than that sprayed by "Shifengle".With the drought stress increasing,water potential of control sharply diminished,but the treated remained high water potential.