雨棚是根据相对于墙体面积的叶面积指数(LAI)来测量的；每单位LAI，日照减少约一半。

Canopy is measured according to leaf-area-index (LAI) relative to wall area; for each unit of LAI, sunlight decreases by about half.

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在顶坛花椒的不同年龄阶段，约两种左右枝级的叶片面积是植株总叶面积的主要组成部分。

The leaf area of two different grades branch is mainly proportion of total leaf area in different age period.

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这个新指标——绿色容积率(GPR)是以一个通常被称作叶面积指数(LAI)的生物参数作为基础，该参数被定义为每单位地块面积上的单面叶面积总和。

This new metric, the green plot ratio (GPR), is based on a common biological parameter called the leaf area index (LAI), which is defined as the single-side leaf area per unit ground area.

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