Nitrogen and Phosphorus stocks and available pools to conversion from native forest to exotic plant plantation in soils of contrasting origin. Differential responses of soil Carbon

>p2 plots were established at adjacent Native Forests (NF) and Pine Plantations (PL).To determine C:N:P inventories alongside N and P available pools, the plot was divided into four sub-quadrants where bulk soil samples were collected at 6 depth intervals in the central soil pit and in four augers at each quadrant up to a depth of 240 cm. The C and N total pools were significantly different between soil types but not between forest types (p=0.02). The highest average C stock across all soils was found in NF (202.22 ± 82.77 Mg ha^-1) compared to PL (172.55 ± 87.73 Mg ha^-1)^.When comparing each soil type individually, disregarding forest type, the Young Ash soil displayed significantly higher C and N than all the other studied soils. On the contrary, the Recent Ash soil displays changes in the C:N:P stoichiometry>sub<.>/sub< Available Phosphorus was significantly different among sites, but not for forest types across sites. Overall, native forest exhibits higher stocks of available NO>sub<3>/sub<^- and we did not find a significant effect of forest type in NH>sub<4>/sub<⁺ stocks. Our result indicates the differential capacity that contrasting soils have to resist this major soil biogeochemical pools alteration.>/p<

Differential responses of soil Carbon,Nitrogen and Phosphorus stocks and available pools to conversion from native forest to exotic plant plantation in soils of contrasting origin. Conference Paper