caa a22 4500 477112080 CHVBK 20180405111612.0 cr unu---uuuuu 170330e19960501xx s 000 0 eng 10.1007/BF00029063 doi (NATIONALLICENCE)springer-10.1007/BF00029063 Study of differences between vertical root maps observed in a maize crop and simulated maps obtained using a model for the three-dimensional architecture of the root system [Elektronische Daten] [Loïc Pagès, Sylvain Pellerin] Differences between observed and simulated vertical root maps were studied in an attempt to evaluate the predictive ability of a simulation model of root system architecture under field conditions on mature plants, and to identify avenues for improvement. Some methodological problems associated with root mapping in the field are considered with a sensitivity analysis. Comparisons were made on a maize crop (early maturing hybrid F1 cultivar ‘Dea') 15 days after silking. Four vertical root maps, perpendicular to the row and midway between two successive plants, were observed. Simulated root maps for different locations along the row showed essentially the same pattern, attesting of an approximately two-dimensional distribution of the roots in such a crop. Simulation of the intesection of roots with thin layers (thickness from 0 to 20 mm) instead of a perfect plane allowed us to assess effects due to the roughness of actual trench walls, and possible artefacts in the observation of root intersections. The simulated root profiles were very sensitive to this thickness, especially in the 0-5 mm range, in both average values, and overall shape. Actual data were close to the 3 mm thick simulations. This value seems plausible under our field conditions. Differences between simulated and actual root maps were shown to be mostly accounted for by the variations in soil bulk density. Thus, this environmental parameter appears as the most important one to include into the model for improving its predictions. Kluwer Academic Publishers, 1996 architecture nationallicence model nationallicence root map nationallicence root profile nationallicence root system nationallicence soil bulk density nationallicence Pagès Loïc Centre d'Avignon, Unité de Recherches en Ecophysiologie et Horticulture, INRA, Domaine St-Paul, F-84914, Avignon Cedex 9, France aut Pellerin Sylvain Centre de Bordeaux, Station d'Agronomie, INRA, F-33883, Villenave d'Ornon Cedex, France aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 182/2(1996-05-01), 329-337 0032-079X 182:2<329 1996 182 11104 https://doi.org/10.1007/BF00029063 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00029063 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pagès Loïc Centre d'Avignon, Unité de Recherches en Ecophysiologie et Horticulture, INRA, Domaine St-Paul, F-84914, Avignon Cedex 9, France aut NATIONALLICENCE 700 1- Pellerin Sylvain Centre de Bordeaux, Station d'Agronomie, INRA, F-33883, Villenave d'Ornon Cedex, France aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 182/2(1996-05-01), 329-337 0032-079X 182:2<329 1996 182 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer