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

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.