毛乌素沙地沙柳与柠条根系分布特征对比  

Root distribution characteristics of Salix psammophyla and Caragana Korshinskii in Mu Us sandy land

作　　者：张莉[1] 吴斌[1] 丁国栋[1] 张宇清[1] 

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

出　　处：《干旱区资源与环境》2010年第3期158-161,共4页Journal of Arid Land Resources and Environment

基　　金：国家科技支撑课题(2006BAD26B03)资助

摘　　要：采用土柱法对毛乌素沙地沙柳与柠条的根系进行了研究。研究表明:沙柳与柠条均为主根型植物,沙柳的水平根更为发达。三年生沙柳根系水平分布在距树基160cm范围内的土层中,距树基0～40cm范围内根系分布最多,占总根量的78.73%;柠条根系水平分布在距树基60cm范围内的土层中,占总根量的78.58%。沙柳根系垂直分布在60cm土层以上,而柠条根系垂直分布在30cm至90cm土层之间。This paper covers the researches about the root distribution characters of Salix psammophyla and Caragana Korshinskii in Mu Us sandy land. Research showed： Both Salix psammophyla and Caragana Korshinskii are taproot type plants, and Salix psammophyla has more developed lateral root. For a three - year - old Salix psammophyla, the horizontal range of root system can reach a radius of 160cm, and mainly in 40cm which can account for 78.73% ; The root of Caragana Korshinskii is mainly 60era in radius, and which account for 78.58%. Root of Salix psammophyla is mainly less than 60cm in depth, and for Caragana Korshinskii, there is a mass of root in 30 -90 cm soil layer.

关 键 词：毛乌素沙地 沙柳 柠条 根系 

分 类 号：Q948[生物学—植物学]