干旱区生态环境知识资源中心

Desert plants exposed to salt stress undergo changes in extreme environment. The ability of plants to detoxify radicals under conditions of salt stress is probably the most critical requirement. Many salt-tolerant species accumulate methylated metabolites, which play crucial dual roles as radical scavengers. Their synthesis is correlated with stress-induced enhancement of photorespiration. It is a temporary and effective desert plant replantation method for defeating the desertification that the desert plant was irrigated by saline water. Apart from plant characteristics, soil composition and drainage characteristics also need to be taken into consideration as they can influence the severity of plant damage by saline irrigation water. This study aims to claim the salt-tolerant and suitable salt concentration of Haloxylon ammodendron through saline water irrigation experiment. The results indicated that the linear relationship between the physiological indices (such as the chlorophyll, proline, and MDA content and membrane permeability) with the salt content of soil. According to modeling of the experimental results, the best conditions of salt content and the salt threshold for growth indices of Haloxylon ammodendron is 4.65 +/- 0.23 g /100 g.