摘要
根据ＰＶ曲线主要水分参数测定数据，进行了黄土区６ 个乔、灌木树种抗旱性季节变化趋势和树种间抗旱性指数排序分析。结果表明，树种抗旱性指数在生长季（５～１０ 月）呈具有阶段降低的持续增大趋势，仅在雨季中后期（ 即树木年第２生长高峰期）略有减小。在年生长季土壤严重干旱阶段，树种的抗旱性指数大小排序为： 海红＞ 河北杨＞ 柠条＞ 小叶杨＞ 北京杨＞
The seasonal and interspecific changes of drought resistance were studied in 6 species of trees in the Loess Plateau based on the data of main water parameters measured by using pressure-volume technique. The result showed that the drought resistance index (DI) value of the tested species was in a steady increase during the annual growing season except in the middle of annual rainy period, i.e. the second peak period of tree growth. During the period of serious water stress of soil profile, the DI values of 6 species had following order from big to small: Malus micromalus, Populus hopeiensis, Caragana korshinskii, Populus simonii, Populus beijingensis, Robinia pseudoacacia .
出处
《植物研究》
CAS
CSCD
北大核心
1999年第3期341-346,共6页
Bulletin of Botanical Research
基金
山西省自然科学基金
山西省留学回国人员基金
关键词
树种
水分参数
抗旱性指数
压力-体积技术
Tree species
Pressure-volume analysis
Water parameters
Drought resistance index
