Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Study on the root distribution of Populus tomentosa.

Abstract

The root systems of Populus tomentosa plantations [in Hebei, China] were investigated with respect to form, quantity and density. The root systems were of a combined horizontal and plagiotropic type, with the roots of 14-yr-old trees extending to 4.5 m depth and 8.0 m around the trees. Measured as root weight, root distribution was concentrated at 0-60, 0-100, 0-100 cm depths in 7-, 9- and 14-yr-old trees, respectively, with more than 86% of roots distributed in the 2.0 m around the trees. Measured by root length, the roots were fairly well-distributed over the soil, with more than 80% at 0-80 cm depth. The density and characteristics of root distribution varied with stand age, topography and depth of the soil layer.