Analysis on physiological and biochemical characteristics of four afforestation trees species during recovering stage

The experimental materials were nutritional bowl seedlings planted 55 days in the same year. Using nutrition tray，grown Populus alba×P. bolleana and Hippophae rhamnoides L.，Ulmus pumila，Xanthoceras sobifolia Bunge seedlings to afforest in growing season from June to August，and the physiological and biochemical characteristics of experimental were measured，to provide a basis for afforestation during recovering stage. The results showed that for U. pumila in the growing season，the differences of each index was not obvious，only Pro content in July planting was significantly higher than that in June and August. When the X. sobifolia Bunge was afforestation in July，its indicators were higher than those in July and August；P. alba×P. bolleana was afforestation in July，its Pro content was significantly higher than that in in June and August，but the soluble sugar and soluble protein content in August were high；X. sobifolia Bunge in July，the indexes were higher than those in June and August；U. pumila，P. alba×P. bolleana could plant in June，July and August，Russian seabuckthorn could plant in June，in July sorbifolia was easier to survive.