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Publication Date
1997
Location
Manitoba and Saskatchewan
Description
A mechanistic model which describes the dynamics of dry matter digestibility (DMD) in leaves in a grass sward was developed. The model treats the leaves in the sward canopy as a set of 2 cm-long canopy components, and simulates DMD dynamics in the components from their emergence through aging. Each component has its own initial DMD at emergence, and the DMD decreases as the component ages. The model was parameterized and tested against data from a bahiagrass (Paspalum notatum Függe) pasture. This new, mechanistic approach was proved to be useful in developing our mechanistic understanding of DMD dynamics in a growing plant. The model is considered to be of use as a part of an integrated model of sward canopy structure which can be used to simulate herbage intake of a grazing animal at a level of a bite.
Citation
Hirata, M, "A Model of Digestibility Dynamics in Leaf Segments in Grass Swards" (1997). IGC Proceedings (1985-2023). 33.
(URL: https://uknowledge.uky.edu/igc/1997/session17/33)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
A Model of Digestibility Dynamics in Leaf Segments in Grass Swards
Manitoba and Saskatchewan
A mechanistic model which describes the dynamics of dry matter digestibility (DMD) in leaves in a grass sward was developed. The model treats the leaves in the sward canopy as a set of 2 cm-long canopy components, and simulates DMD dynamics in the components from their emergence through aging. Each component has its own initial DMD at emergence, and the DMD decreases as the component ages. The model was parameterized and tested against data from a bahiagrass (Paspalum notatum Függe) pasture. This new, mechanistic approach was proved to be useful in developing our mechanistic understanding of DMD dynamics in a growing plant. The model is considered to be of use as a part of an integrated model of sward canopy structure which can be used to simulate herbage intake of a grazing animal at a level of a bite.
