The LIGNUM functional-structural tree model

摘要: The aim of this thesis was to construct a single tree model that builds bridge between traditional process based models and detailed, three-dimensional architectural models. result the thesis, functional-structural LIGNUM, integrates both functional structural aspects woody arborescent plants in generic modelling framework. consists five articles summary part. first article presents structure LIGNUM on simple recurring botanical units, their metabolic processes allocation photosynthates basis carbon balance resolved according specific growth potential different parts crown. is applied young Scots pine (Pinus sylvestris L.). second studies alternative formulations sapwood senescence pine. third an improvement assessing solar radiation absorption mutual shading segments. fourth adapts deciduous species with sugar maple (Acer saccharum Marsh) as example. fifth introduces Lindenmayer systems for defining development central problem process-based has been resource capture dynamically growing tree. main contribution present solution how can be allocated among possibly thousands units simulate crown, keep track each elementary unit, define local capacity produce use resources, determine interactions other external environment.