Leaf area index

A hemispherical photograph of forest canopy. The ratio of the area of canopy to sky is used to approximate LAI.

Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m / m) in broadleaf canopies. In conifers, three definitions for LAI have been used:

单词	Leaf area index
释义	Leaf area index 原声例句 TED演讲（视频版） 2015年10月合集 And this is called the leaf area index. 这被称作是“叶面积指数”。英语百科 Leaf area index Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m / m) in broadleaf canopies. In conifers, three definitions for LAI have been used:
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