ISHS Acta Horticulturae 449: II International Symposium on Irrigation of Horticultural Crops
CONTROL OF HYDRIC SOIL CONDITIONS AND HYDRIC SUPPLY FOR LARGE TREE TRANSPLANTATION IN LANDSCAPED AREAS: PRELIMINARY RESULTS. THE EXAMPLE OF THE INTERNATIONAL CENTRE OF LYONS, FRANCE |
| Authors: | A. Maarouf, J.P. Rossignol |
| Keywords: | Soil water potential, predawn water potential, large tree transplantation, landscaped areas, Lyons, France |
| Abstract:
Large trees, cultivated in a nursery for several years, suffer considerable stress during their transplantation into landscaped areas. This study is a first step to better understand hydric soil conditions and hydric supply for large trees during the recovery period. The landscaped improvements of green areas of the International Centre of Lyons on the Rhône riverside provided an opportunity for Villeurbanne and Lyons Green Space Services, Lyons Urban Community and International Centre Society to create an Urban Tree Observatory in relation with research institutions. The scientific measures were made in 1995 on ash trees (Fraxinus americana), eight years old, transplanted in April and November 1994 into plantation pits (4mx2m) where reconstituted soils (Anthroposols) are homogeneous with a mulch of pouzzolana stones. The trees are irrigated by both manual techniques and drip irrigation. The soil hydric potentials are measured by resistance probes, the bulk density with a gammadensimetre; the predown water potential of the leaves and the branch diameter variations are measured on the trees. The results of these measurements indicate that it is possible to make use of up to date modern techniques to improve the rapid recovery of large trees in an urban environment. | |
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