55个珍贵树种稳定凋萎含水量与耐旱力评价分析

Evaluation of Stabilized Languish Containing Water Volume and Drought Tolerance Ability of 55 Rare Species

通过盆栽试验,测定评价了55个树种的稳定凋萎含水量及其耐干旱能力.①55个树种的初始凋萎含水量和稳定凋萎含水量分别变化在4.81%~11.05%和1.85%~5.87%,稳定凋萎含水量出现时间平均为24.99 d,变化在7.00 d^42.30 d,初始凋萎含水量与稳定凋萎含水量出现的时间平均相差11.11 d,变化在3.20 d^30.60 d;②初始凋萎含水量、稳定凋萎含水量出现的时间、初始凋萎含水量至稳定凋萎含水量出现的时间差随光照强度的减少而增加,而稳定凋萎含水量的变化不明显;③单因素评价与多因素综合评价结果有趋同性,但在树种的排序上存在差异.单因素评价和多因素综合评价结果可分别用于不同干旱类型环境,有些耐旱力较强的树种同时也有较强的耐涝性,有的则相反.

Through potted planting experiments,55 kind of trees were put in a drought-resistant environment to measure the drought-resistant capacity of subtropical trees.Results show that the initial and stabilized wilting water content changed between 4.81% and 11.05%,1.85% and 5.87% respectively,the average appearing time of stabilized lwilting water content is 24.99 days,changed between 7.00 and 42.30 days,the average time between the initial and stabilized is 11.11 days,changed between 3.20 days and 30.60 days;the time from initial to stabilized wilting water content was increased with the reduction of light intensity.The result of single element evaluation is the same as the muli-factor evaluation,but has differences in the compositor of tree species;the results of single element evaluation and muli-factor evaluation can be applicable to the different drought circumstances,some stronger drought-resistant tree species have stronger flooding tolerance,some trees have opposite results（while some not）.