群落中光照的分布状况受乔木层的种类组成、密度与冠幅指数等因子的影响,且对下层植物分布有较大的作用。
The species component, density and index of crown cover in the tree layer effect on distribution of illumination and under plants in the plant community.
作为基本植物的四照花(山茱萸)是半荫地区最佳的下层植被。
Dogwoods make excellent understory trees in a semi-shaded area and can be used in foundation plantings.
植物和树木种植在沟中,创造一个翠绿的花园,它的两侧是地下层。
Plants and trees fill the chasm, creating a verdant garden that flanks the basement level.
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