不同造林时间对3个树种幼苗叶片光合特性的影响  

Photosynthetic Characteristics of Seedling Leaves of Three Tree Species in Different Afforestation Time

作　　者：李丕军[1] 王文月[1] 艾吉尔.阿不拉 贾瑞琪[1] 宁虎森[1] 

机构地区：[1]新疆林业科学院造林治沙研究所,新疆乌鲁木齐830063

出　　处：《河南农业科学》2014年第11期113-116,共4页Journal of Henan Agricultural Sciences

基　　金：新疆科技计划项目(201254112)

摘　　要：采用培育55 d的银新杨、白榆和文冠果营养钵苗在生长季6月、7月和8月不同时间进行造林，测定缓苗期3个树种叶片的光合指标，以期为幼苗缓苗期的管理提供依据。结果表明：3个树种的光合指标均存在显著差异。同一树种不同造林时间的净光合速率无显著差异，蒸腾速率、气孔导度、胞间CO2浓度则存在差异，以7月的值最大。3个树种在不同造林时间的光合特性变化基本一致，净光合速率、蒸腾速率、气孔导度与胞间 CO2浓度在栽后1～3 d出现持续下降，4 d开始回升，5～7d内恢复到栽前水平。3个树种在不同造林时间的缓苗期为5～7d，此时应该加强土壤水分的管理，保证水分供应充足，确保幼苗尽快度过缓苗期，提高造林成活率。The Populus alba × Populus bolleana,Ulmus pumila,Xanthoceras sobifolia Bunge nutrition seedlings were planted in June,July and August growing season,the photosynthetic characteristics of three species were measured at rej uvenation period,so as to provide a basis for afforestation management at recovering stage. The results showed that photosynthetic characteristics of three tree species were significantly different;for the same tree species,net photosynthetic rate was not significantly different in different afforestation time,transpiration rate,stomatal conductance and intercellular CO2 concentration were different,the maximum value appeared at July.The variation of photosynthetic characteristics of three species was basically same in different afforestation time,net photosynthetic rate,transpiration rate,stomatal conductance and intercellular CO2 concentration continued to decline from 1 d to 3 d after transplanting,began to rise at 4 d after transplanting,restored to the level before planting from 5d to 7d after transplanting.The recovering stage of three different tree species was from 5 d to 7 d after transplanting,at this point the management of soil moisture should be strengthened and adequate water should be supplied to ensure the seedlings spend recovering stage as soon as possible,and increase the survival rate.

关 键 词：银新杨 白榆 文冠果 造林时间 净光合速率 蒸腾速率 气孔导度 胞间CO2 浓度 

分 类 号：S792.11[农业科学—林木遗传育种]