关键词: 黄葛树(Ficus virens var. sublanceolata), 小叶榕(Ficus microcarpa L.), 春鹃(Rhododendron pulchrum Sweet), 根系分布

Abstract: Ficus virens var. sublanceolata, Ficus microcarpa L. and Rhododendron pulchrum Sweet were taken as test objects, 1 m ×1 m ×1 m soil profile in south direction was dug to observe the distribution of the root system. It was found that from trunk at a distance of about 1 m in south direction, above 88.1% of the roots mainly distributed in the 0 to 60 cm deep soil layer for Ficus virens var. sublanceolata, above 92.0% of the root system was mainly distributed in the 0 to 60 cm deep soil layer for Ficus microcarpa L., above 43.4% of the root system was mainly distributed in the 0 to 30 cm deep soil layer for Rhododendron pulchrum Sweet. In addition, fibrous roots of the three plants can develop into flat or cloud-like structures in the gaps between purple soil fragments and bricks, and their root structure characteristics are more suitable for the status quo of landscape greening soil in Chongqing city.

Key words: Ficus virens var. sublanceolata, Ficus microcarpa L., Rhododendron pulchrum Sweet, the root system distribution