手法を比較

	葉面積指数	根系の構造解析
分野	農学	農学
系統	Process / pipeline	Process / pipeline
提唱年	1947	Systematic methods developed from the 1970s onward; foundational review by Lynch (1995)
提唱者	Donald J. Watson	Multiple contributors
種類	Plant morphometric measurement	Quantitative morphological analysis pipeline
原典	Watson, D. J. (1947). Comparative physiological studies on the growth of field crops: I. Variation in net assimilation rate and leaf area between species and varieties, and within and between years. Annals of Botany, 11(43), 375-407.	Lynch, J. (1995). Root architecture and plant productivity. Plant Physiology, 109(1), 7–13.
別名	LAI, Leaf area, Canopy structure	root system architecture analysis, RSA analysis, root morphology analysis, root phenotyping
関連	3	0
概要	Leaf Area Index (LAI) is a dimensionless quantity that measures the total one-sided area of leaves per unit ground area covered by a canopy. It quantifies canopy density and structure: LAI = 0 for bare soil, LAI = 1 for a thin crop, LAI = 3-6 for dense cereal or grass canopies, and LAI > 8 for dense forest. LAI is a key variable in crop growth models, evapotranspiration estimation, and remote sensing because it directly controls light interception, photosynthesis, and water loss from vegetation.	Root Architecture Analysis is a quantitative method in agronomy and plant science that characterises the spatial configuration, branching pattern, and geometric properties of a plant's root system. By measuring parameters such as total root length, lateral root density, root angle, and root tip number, researchers link below-ground structural traits to nutrient and water acquisition efficiency, soil penetration capacity, and ultimately to crop productivity and stress tolerance.