4个造林树种缓苗期生理生化特性分析

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

采用种条培育55d的银×新杨和俄罗斯大果沙棘营养钵扦插苗、白榆和文冠果营养钵播种苗在6、7、8月不同生长季进行造林,测定不同造林时间和不同缓苗期4个树种的生理生化指标,以期为干旱区生长季造林及缓苗期的管理提供依据。结果表明:白榆在生长季不同时间造林时,除脯氨酸含量在7月造林时明显高于6、8月外,可溶性糖和可溶性蛋白无明显差异;俄罗斯大果沙棘在6月造林时,可溶性糖、脯氨酸、可溶性蛋白均高于7、8月造林;银×新杨的脯氨酸含量在7月造林时明显高于6、8月,但可溶性糖和可溶性蛋白含量均表现为8月高;文冠果7月造林时的可溶性糖、脯氨酸、可溶性蛋白含量均高于6、8月。白榆,银×新杨在6、7、8月均可造林,俄罗斯大果沙棘在6月造林、文冠果在7月造林较易成活。

The experimental materials were nutritional bowl seedlings planted 55 days in the same year. Using nutrition tray, grown Populus alba x 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.