不同盐分胁迫对美洲红树耐盐性和耐旱性的影响

Effect of Different Salt Stress on Saline Tolerance and Drought Resistance of American Mangrove

为了提高树木对干旱、盐碱环境的适应性,苗木时期人为制造一定程度的不良环境,锻炼苗木对不良环境的适应能力,从而提高造林后林分的效益和稳定性。该试验分为前处理和本处理,前处理设淡水区、1/2海水区(含盐1.7%)和海水区(含盐3.4%),生长45 d后,进行本处理,统一用含盐浓度7%的盐水进行浇灌。结果表明:经过前处理的1/2海水区中生长的苗木其叶、茎、根的生长量均超过淡水区中生长的苗木。说明一定程度的耐盐锻炼能够增强苗木对盐碱、干旱环境的适应能力。

in order to increase the adaptability of trees on environments of drought and saline, poor environment was made artificially in seedling stages, which could build up adaptability of seedlings to poor environment. That could increase stand benefit and stability after forestation. The experiment included pre-processing and present treatment. Pre-processing set up freshwater zone and half of seawater zone （ salt concentration 1.7% ） and seawater （ salt concentration 3.4% ）. After growing for 45 days, present treatments were made （ irrigating with 7% concentration of salt water）. Results showed that the amount of growth of leaves and stems and roots of seedlings growing in half of seawater with pre-processing was superior to that growing in freshwater zone. Results showed that saline tolerance training with certain degrees could increase adaptability of seedlings on environment of drought and saline.