Macro- Nutrient Dynamics during the decomposition of brown needle litter of Aleppo pine (Pinus halepensis Mill.) in AlGabal AlAkhdar Eco-region-Libya.

Abstract

The aim of this study was to track the changes (dynamics) that occur in nitrogen (N), phosphorus (P)and potassium (K) during stages of decomposition of fallen brown needle litter of Aleppo pine trees(Pinus halepensis Mill) growing in the Green Mountain region – Libya. To achieve this goal ,the Aki technique was followed( bag technique in three locations 800, 600, and 400 metres above sea level,(800) Sidi El Hamri Forest, (600) Ain Al- Hofrah, (400) Mansoura Sanatorium) and the experiment began in the fall and continued until the spring the results of this study, which werein the direction of previous studies and confirmed those studies, indicate that in the first of days of the process, decomposition is the occurrence of a leaching process for the macronutrients N, P and K estimated in this research, followed by an a ccumulation stage, (Accumulation) and that the initial concentration of these nutrients affected the amount of lost concentrations and  accumulated in the Aleppo pine residues, and the  fertility of the site also affected the quality of the fallen brown needle leaves and their response , the rate of decomposition varied depending on the location where the fortification was carried out ,it was shown that these remains are an important store of nitrogen and phosphorus, potassium, therefore, this layer of fallen remains of forest tree must be preserved, which is considered a storehouse of nutrients and determinant of growth in those forests and their sustainability.