作　　者： ; (李吉跃）; (齐涛）;

机构地区： 北京林业大学资源与环境学院

出　　处： 《北京林业大学学报》 2006年第S2期25-30,共6页

摘　　要： 采用BP34000精密天平等仪器对喷施不同浓度(10、20、40mg/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=0·0182x2-1·0713x+16·52(R2=0·9987).在相同水分条件下,对照苗木的耗水速率较处理过的高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. Water consumption of Sophora japonica L. sprayed with different concentrations of plant growth regulator “Shifengle' solution of 10, 20 and 40 mg/L (with water as the control) was studied. Leaf water potential was measured using pressure chamber in different phases. It indicated that S. japonica was a low-water-potential, dehydration-resistant, drought-resistant species. The relationship between water potential and soil moisture content could be expressed by the equation y=0.018 2 x^2-1.071 3 x + 16.52 (R^2= 0.998 7). In the same moisture content condition, water consumption rate of the control was 10.2%-82.7% higher than that sprayed by “Shifengle'. With the increase of drought stress intensity, water potential of the control decreased sharply, but the “Shifengle'-treated remained high water potential. “Shifengle' contributed to the reduction of water consumption and the drought-resistance of seedlings.

关 键 词： 施丰乐 国槐 水势 耗水量 耗水速率

领　　域： [农业科学] [农业科学]