Differences in Soil Physicochemical Properties in Different-Aged Pinus massoniana Plantations in Southwest China

With increasing age, plants will cause changes in soil physicochemical properties. The objective of this study was to investigate differences the properties different-aged Masson pine forest plantations (i.e., 10, 20, 40, and 60 years old). Soil samples were collected a pure plantation Southwest China. determination indexes included organic carbon, nitrogen, phosphorus potassium contents, water content, bulk density, pH. pH 20-year-old significantly (p < 0.05) higher than that 60-year-old forest. In addition, soil-available other three age groups. available increased, while nitrogen decreased at 20 old then increased 40 old. There significant positive correlation between total potassium; no (p> potassium, pH; negative content. availability utilization efficiency nutrients young forests those intermediate an important time point affected To improve ensure sustainable resources, it is necessary increase input especially phosphorus. More attention should be given phytochemometric response with respect plantations.