Abstract: A study was carried out on small Alep pine plants behaviour using vegetation pots in order to test a hypothetic litter forest effect allelopathy on this species regeneration. It revealed favourable litter action, i.e. best growth and development plant. So, it shows best monospecific litter effect (Alep pine) on plants behaviour compared to mixed litters (Alep pine and holm oak). This best plant behaviour which consisted of greatest radial and vertical growth, great biomass, great volumic index and best chemical nutrition (chemical mass) was caused by the fact that Alep pine monospecific litters, with acid character, induced best nutritious elements dynamic (N, P, K) and great microbial groups activity (mineralisators fungi, myccorhiza) in soil.