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.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2006年第S2期25-30,共6页
Journal of Beijing Forestry University
基金
Fundedbythe National High Technology Research and Development Project of China (863 Project) and"Integration and Demonstration of IntegratedTechnology Systems of Greenbelt Irritation and Water Conservationin Sub-arid Cities of Northern China"(2002AA2Z4281) .
关键词
“施丰乐”
国槐
水势
耗水量
耗水速率
“Shifengle”, Sophora japonica L., water potential, water consumption, water consumption rate
