An indirect method of estimating leaf area index in Jatropha curcas L. using LAI-2000 Plant Canopy Analyzer

Spatiotemporal variation and scale effect of canopy leaf area index of larch plantation on a slope of the semi-humid Liupan Mountains, Ningxia, China

“…参 数 , 是 森 林 生 长 和 演 替 的 重 要 驱 动 因 子 (Berterretche et al, 2005;姚丹丹等, 2015), 与植被 蒸腾、林下蒸发、降雨截留等水文过程和林木生长 等生态过程密切相关 (Granier et al, 2000;Nasahara et al, 2008;Behera et al, 2010), 因而是许多森林生 长及生产力模型、气候模型和水文模型的主要输入 项 (Running & Coughlan, 1988;Cox et al, 1999;Granier et al, 1999), 在关注森林动态结构影响水文 过程的生态水文研究中被看作是重要的水文要素 (Staelens et al, 2006)。由于受林分结构 (Bequet et al, 2012) …”

Improving the accuracy of indirect methods in estimating leaf area index using three correc-tion schemes in a Larix gmelinii plantation

“…外, 天顶角的范围对计算LAI也存在一定的影响 (Dufrêne & Bréda, 1995;Macfarlane et al, 2007;Liu et al, 2015b)。 以往研究中利用光学仪器法计算LAI时通 常采用的天顶角范围为0-45° (Chen et al, 2006), 0-60° (Eriksson et al, 2005), 0-75° (Behera et al, 2010), 30°-60° (Walter & Jonckheere, 2010), 45°-60° (Eriksson et al, 2005;Liu et al, 2015a), 57.5° (Leblanc et al, 2005) …”

Using the conservative nature of fresh leaf surface density to measure foliar area

“…Additionally, leaf biometrics are markers of nutritional status or environmental stress on the plant (Meziane and Shipley, 1999;Vile et al, 2005). The leaf area index (LAI) of a stand of plants is one of the most frequently used parameters for the analysis of canopy structure and is an important structural characteristic of crop/forest monitoring and crop productivity (Behera et al, 2010). It is fundamentally important as a parameter in land-surface processes and for parametrizations in climate models.…”

“…Direct methods of LAI determination are based on the destructive technique of the LA measurements of the individual leaves and are considered to be the most accurate, albeit time-consuming, ways of determining LAI (Jonckheere et al, 2004). Nonetheless, they are used to benchmark nondestructive methods of LAI determination (Behera et al, 2010;Kirk et al, 2009).…”