流动沙丘沙埋对沙柳生长特性的影响  

The Impacts of Sand Burial on the Growth Characteristic of Salix Psammophila in Mobile Sand Dune

作　　者：原鹏飞[1] 丁国栋[1] 赵奎[1] 

机构地区：[1]教育部水土保持与荒漠化防治重点实验室,北京林业大学水土保持学院,北京100083

出　　处：《水土保持研究》2008年第4期53-55,共3页Research of Soil and Water Conservation

基　　金：国家“十一五”攻关项目沙区农田和草场风蚀防控与人居环境安全保障技术研究(2006BAD26B03)

摘　　要：对毛乌素沙地流动沙丘上沙柳的根系分布、冠层特征进行研究,结果表明:沙柳在不同的环境中其生长状况有所差异。沙柳遭流沙掩埋后,被掩埋的枝条发展为根系,且萌发新的不定根,有效的增加了沙柳地下部分的深度、广度和生物量,增强了沙柳根系吸收水分和养分的能力。从而引起地上部分的覆盖面积和生物量较未沙埋沙柳都有了明显的增加。Based on investigating the root distribution and canopy characteristics of Salix Psammophila in mobile sand dune in Maowusu Hinterland,the results show that there are some differences about the growth status of the Salix psammophila in different environment.After Salix psammophila was buried in sand,the sand-burying wattles become to the root,and bourgeon the new adventitious root.So that effective increase the depth,scope and biomass in the ground layer of Salix psammophila.Then it enhanced the capability that the root system absorbs water and nutrient,which lead to the significant increase of covered area and biomass on the overground layer contrasted with no sand-burying Salix psammophila.

关 键 词：沙埋沙柳 不定根 生物量 

分 类 号：S792.12[农业科学—林木遗传育种] X171.1[农业科学—林学]