Modelling and simulation of the architecture and development of the oil-palm (Elaeis guineensis Jacq.) root system. II. Estimation of root parameters using the RACINES postprocessor.

摘要

A stochastic model of oil palm root system architecture and development makes it possible to simulate 3-D numerical models of complete root systems. Application of a program called RACINES to these 3-D numerical models provided estimates of some parameters of plant root systems: spatial distribution of roots under plantation conditions; estimation and distribution of total root biomass, per root type or per soil horizon; and the location and quantification of absorbent surfaces. The computing techniques used were based on voxellization of space and creation of 3-D virtual sceneries exactly reproducing observed planting designs. By comparing the results of observations and simulations for spatial distribution (by trench wall density maps) and rootbiomass (by real and virtual sampling) it was possible to carry out additional numerical validations of the model.