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：2010
卷号：21
期号：3
页码：196-202
DOI：10.1684/sec.2010.0255
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Babou André Bationo , N Antoine Some , Sibiri Jean Ouedraogo , Antoine Kalinganire Inera Institut de l'environnement et de recherches agricoles Département productions forestières (Inera/DPF) 04 BP 8645 Ouagadougou 04 04 BP 8645 Ouagadougou Burkina Faso, Université polytechnique de Bobo-Dioulasso Institut de développement rural (IDR)BP 1091 Bobo-Dioulasso Burkina Faso, World Agroforestery Centre (ICRAF) BP 320 Bamako Mali Key words: Burkina Faso, forest species, regeneration, root growth, seedling DOI : 10.1684/sec.2010.0255 Page(s) : 196-202 Published in: 2010 In addition to biophysical constraints, insufficient scientific knowledge of the ecology of seminal regeneration of several Sudanian woody species hinders favourable implementation of cultivation techniques adapted to early stages of forestry regeneration. The objective of this study is to follow the development of seedlings of five woody species of Sudanian natural forests : Terminalia avicennioides Guill. et Perr., Piliostigma thonningii (Schumach. & Thonn.) Milne-Redh., Isoberlinia doka Caib et Stapf, Afzelia africana Sm. et Detarium microcarpum Guill. et Perr. The study was carried out on seedlings grown in rhizotons on two soil profile types. The results show that all species, apart from A. africana, have cryptogeal germination. At an early stage seedlings allocate the resource preferably in the roots, causing swelling of the top root due to the accumulation of reserves. It also results in early rooting. Rate of depth-rooting depends on the species and soil types. D. microcarpum have the strongest rate of rooting and T. avicennioides the weakest. The top-rooting of seedlings of T. avicennioides and A. africana is negatively affected by soil compaction. Cryptogeal germination and early development of the root system make it possible for seedlings to better support drought, fire and browsing. The stems of seedlings have rhythmic growth due to a rhythmic functioning of the terminal buds.
