| 散孔材和环孔材树种叶水分传输能力及其与抗旱性的关系 |
| |
| 引用本文： | 李俊辉,李秧秧. 散孔材和环孔材树种叶水分传输能力及其与抗旱性的关系[J]. 西北植物学报, 2011, 31(7): 1441-1446 |
| |
| 作者姓名： | 李俊辉 李秧秧 |
| |
| 作者单位： | 1. 中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨陵,712100;中国科学院研究生院,北京,100039
2. 中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨陵,712100 |
| |
| 基金项目： | 国家自然科学基金项目(31070541); 国家林业局林业公益性行业科研专项经费(200904056) |
| |
| 摘 要： | 选取树龄相同的3种散孔材(杨树、梧桐和樱花)和3种环孔材(刺槐、合欢和白蜡)树种,用3种不同方法(解剖法、加压法和水容法)研究了其叶水力导度的差异及与抗旱性(PV曲线参数)的关系.结果显示:解剖法估算的最大叶水力导度高于加压法和水容法,加压法和水容法在6个树种中的5个上测定值完全一致,3种散孔材与环孔材树种的叶最大水力导度无显著差异.3种散孔材树种的饱和渗透势和膨压损失点渗透势与3种环孔材相比差异不大,但膨压损失点的相对含水量则低于环孔材树种,质外体含水量高于环孔材树种,导致其综合抗旱性指数也高于3种环孔材树种.研究表明,散孔材和环孔材树种的叶最大水力导度与其抗旱性之间并无显著相关关系.
|
| 关 键 词： | 散孔材 环孔材 叶最大水力导度 抗旱性 |
Leaf Water Transport Capabilities in Diffuse-porous and Ring-porousTree Species and Its Relationship with Drought Resistance |
| |
| LI Jun-hui,LI Yang-yang. Leaf Water Transport Capabilities in Diffuse-porous and Ring-porousTree Species and Its Relationship with Drought Resistance[J]. Acta Botanica Boreali-Occidentalia Sinica, 2011, 31(7): 1441-1446 |
| |
| Authors: | LI Jun-hui LI Yang-yang |
| |
| Affiliation: | LI Jun-hui1,2,LI Yang-yang1,3(1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,CAS & MWR,Yangling,Shaanxi 712100,China,2 Graduate School of Chinese Academy of Sciences,Beijing 100039,3 Institute of Soil and Water Conservation,Northwest A&F University,China) |
| |
| Abstract: | Leaf maximum hydraulic conductance(measured with three methods:anatomic,pressuring and capacitance method) and its relationship with drought resistance(PV curves) were studied in three diffuse-porous species(Populus tomentosa,Platanus hispanica,Prunus lannesiana) and three ring-porous species(Robinia pseudoacacia,Albizzia julibrissin,Fraxinus chinensis).The results indicated that leaf maximum hydraulic conductance measured by anatomic method was higher than those by pressuring method and capacitance method.... |
| |
| Keywords: | diffuse-porous species ring-porous species leaf hydraulic conductance drought resistance |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
