期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2005
卷号：16
期号：4
页码：309-311
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Babou-André Bationo , Saley Karim , Ronald Bellefontaine , Mahamane Saadou , Sita Guinko , Aboubacar Ichaou , Adamou Bouhari Institut national de l’environnement et de recherche agricole (Inera), Centre régional de recherches environnementales et agricoles (CRREE), BP 10, Koudougou, Burkina Faso, Faculté des sciences, Université de Niamey, BP 10622, Niamey, Niger, Centre de coopération internationale en recherche agronomique pour le développement (Cirad), Département forêts, TA 10/D, 34398 Montpellier, France, Laboratoire de botanique et de biologie végétale, Université de Ouagadougou, 03 BP 7021, Ouagadougou 03, Burkina Faso, Ministère de la Recherche, Institut national de recherche agronomique du Niger (Inran), Département de recherche forestière, BP 429, Niamey, Niger, AP/Point focal PNUD/FEM, BP 11 207, Niamey, Niger Key words: terrestrial layering, natural vegetative propagation, rehabilitation of degraded lands, Guiera senegalensis, Combretum micranthum, Burkina Faso, Niger Page(s) : 309-11 Published in: 2005 Various regeneration modes of Guiera senegalensis J.F. Gmel. and Combretum micranthum G. Don, two species which are economically important and widespread in West African stripped bushes and fallows, are being studied in Burkina Faso and Niger. Production following natural seeding is most of the time compromised by climatic factors. Very often however, roots are produced by low branches of elder trees in continuous contact with the soil during the short wet season. The rate of this ‘tip-layering method’ (terrestrial layering) changes according to the species, the micro-topography and type of land cultivation. Terrestrial layering is increased by plagiotropic branches, especially on steep slopes. Various traumatisms, such as broken branches, camber arcures, soil recovering by sediment, can stimulate it. Given these first empirical results, it would be interesting to test the of induction terrestrial layering, particularly in these two species (in order to apply it afterwards to other species). This mode of propagation allows the genetic potential to be preserved and tree density as well as the production of wood and woodland co-products to be increased at a very low cost. In semiarid areas, this ‘revegetalisation’ method using vegetative propagation through terrestrial layering in particular, seems cheaper and much more time-saving than other techniques such as artificial seeding or planting, for instance. Moreover, it is replicable, in keeping with the habits of local communities.
