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20 kwi 2023 · Leaf angle, the angle between the leaf normal and the zenith (Figure 1, Box 1), is a key leaf trait associated with light interception, photosynthesis, energy balance and competition among individual plants (Anten, 2005; Nilsen & Forseth, 2018; Ross, 1980).
The leaf angle is a major factor governing k in a given species. Leaf surface properties affecting reflection, leaf properties including thickness, leaf size and shape, and characteristics affecting the three-dimensional arrangement of leaves also affect k (Hay and Porter, 2006).
The ratio between the apparent area of a leaf and its real area is the projection coefficient G. It is a function of both the leaf inclination α (alpha) and the direction from which the leaf is looked at, conveniently given as the angle θ (theta) to the zenith.
The leaf angle distribution (or LAD) of a plant canopy refers to the mathematical description of the angular orientation of the leaves in the vegetation. Specifically, if each leaf is conceptually represented by a small flat plate, its orientation can be described with the zenith and the azimuth angles of the surface normal to that plate.
16 mar 2007 · For the leaves randomly distributed in space, K (rs) is the mean projection of unit leave area on the plane perpendicular to the direction of beam rs and is mainly determined by the angular distribution of the leaves and rs which is represented by zenith and azimuth angles of beam.
Leaf angle, the angle between the leaf normal and the zenith (Figure 1, Box 1), is a key leaf trait associated with light interception, photosynthesis, energy balance
6 paź 2022 · Leaf angle predictions were evaluated over a wide range of species and scene conditions using independent samples from visual interpretation (R2 = 0.84) and compared to leaf angle estimates obtained from terrestrial laser scanning (R2 = 0.75).
