标题：Apport des techniques d’analyse multivariable à l’évaluation de l’état de végétation des peuplements forestiers Cas du chêne-liège en Maâmora (Maroc atlantique)
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：1998
卷号：9
期号：3
页码：219-226
出版社：John Libbey Eurotext
摘要：Authors Mohamed Et-Tobi , Mustapha Ezzahiri , Bakhiyi Belghazi Département de sylviculture et aménagement forestier, École nationale forestière d’ingénieurs, BP 511, Tabriquet, Salé, Maroc. Page(s) : 219-26 Published in: 1998 The health status of cork oaks (Quercus suber) was assessed on 76 circular plots (11 m radius). An initial evaluation revealed 24% healthy stands, 69% traumatized stands, and 7% decayed stands, i.e. localized decay. Analysis of the FAC parameter results indicated that : âÇ“ density, basal area and cover were closely related to high mortality rates ; âÇ“ age (young) and cork-barking characteristics of stands were also found to be related to mortality rates ; âÇ“ stands on sandy soils over clay did not reach the critical mortality level. The study also highlighted that stands of timber trees, over-stump timber trees, copsewood under timber trees, and old stands of low density and high basal area characterized area with the least marked degree of decay. The results indicated that silvicultural pratices could be functionally efficient with a suitable management model.
