Changes in Soil-Phosphorus Fractions by Nitrogen and Phosphorus Fertilization in Korean Pine Plantation and Its Natural Forest

Phosphorus (P) is the restraining aspect in forest ecosystem, particularly temperate regions, and makes ecosystem more liable to nitrogen (N)-derived acidification. However, it remains poorly understood how N P fertilization together affects soil-P availability other soil properties. To address this question, a factorial experiment was conducted with additions under two ecosystems, i.e., Korean pine plantation (KPP) natural (NKPF). Both forests were divided three subplots each subplot underwent four different treatments, C: control (no addition), L: Low treatment (5 g m−2 a−1 + 5 a−1), M: Medium (15 10 H: High (30 20 a−1). Results revealed that fractions changed during over time although organic-P (Po) lower than inorganic-P (Pi) fractions. The residual increased overall, along deposition soil. Soil organic carbon (SOC) present NKPF soils as compared KPP. Principal component analysis (PCA) indicated at medium there maximum of treatments both forests, while high showed some fixation across forests. Furthermore, SOC negative correlation P, pH positive correlation. Total P. Therefore, recommended application rate 15 suitable these types enhance availability.