Root structure of slope protection plants in a high-grade highway

• 作 者: WANG Jing-hong LI Xing-tao LIU
• 机 构: College of Landscape Architecture
• 出 处: 林业研究（英文版）
• 发表日期: 2004年期
• 关键词: seasonal frost area slope protection plant root structure
• 基金项目: Natural Science Fund Project of Heilongjiang Province

Root length and root length density of Lespedeza bicolor,Amorpha fruticosa,and Sea buckthorn were investigated in a country highway-TongSan highway (Tongjiang to Sanya) in Heilongjiang Province,China.The root lengths were divided into five root orders according to Pregizter sequence classification method.Results show that sea buckthom roots are dominated by coarse roots in the horizontal growth,while L.bicolor has a large proportion of fine roots in vertical conical growth and A.fruticosa is in depth growth.Root length density of L.bicolor in all the root sequences is higher than that of sea buckthom and A.fruticosa.On the basis of the root structure,it is inferred that L.bicolor roots mainly absorb the surface soil moisture for its normal growth; in contrast,A.fruticosa has good uptake ability to deep soil water.The root structure of sea buckthom implies that it has a strong drought resistance.