不同浓度盐碱胁迫对4个树种幼苗生长的影响

Effects of Saline-alkali Stress of Different Concentrations on the Growth of Young Trees of 4 Species

为研究盐碱胁迫对不同树种幼苗及生理特征的影响,以水杉、中山杉、榉树和栾树实生苗为试验材料,设置4个模拟盐碱浓度,研究4个树种幼苗的生长、保护酶活性变化。结果表明,随着盐碱浓度的增加,各树种的生长量呈逐渐降低趋势,SOD.POD和CAT活性呈先升高后降低的变化趋势。总体而言,在盐碱胁迫下栾树的保护酶活性最高,是盐碱地生态修复的推荐树种。

In this paper,in order to study the effects of saline-alkali stress on the seedlings and physiological features of different tree species,seedlings of Metasequoia glyptostroboides,Taxodium hybrid'zhongs hans haZelkova serrata and Koelreuteria paniculata were used as test materials with 4 simulated saline-alkali concentrations designed to study the changes of growth and protective enzyme activities of these seedlings.The results showed that,with the increase of saline-alkali concentration,the growth of all the 4 species decreased gradually and the activities of SOD,POD and CAT showed a rise-fall trend.In general,Koelreuteria paniculata had the highest protective enzyme activity under saline-alkali stress and could be recommended for ecological restoration in saline-alkali land.