植物生长调节剂对国槐蒸腾耗水的影响  

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

作　　者：何茜[1] 李吉跃[1] 齐涛[2] 

机构地区：[1]北京林业大学资源与环境学院 [2]四川省林业厅种苗站

出　　处：《北京林业大学学报》2007年第1期74-78,共5页Journal of Beijing Forestry University

基　　金："863"国家高新技术研究发展计划项目(2002AA2Z4281)

摘　　要：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=0．0182x^2-1．0713x＋16．52（R^2=0．9987）．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．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.

关 键 词：“施丰乐” 国槐 水势 耗水量 耗水速率 

分 类 号：S792.26[农业科学—林木遗传育种] S718.43[农业科学—林学]