| 摘要 |
By measuring the contents of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (P) in rhizosphere and non-rhizosphere soils of Q. variabilis forests with different ages (22, 35, and 45 a) and origins (natural forests and planted forests) in the Funiu Mountain area, the stoichiometric characteristics of carbon, nitrogen, and phosphorus in Q. variabilis forest soils were evaluated. The research results indicated that: ① there were significant differences (P<0.05) in the SOC content between the rhizosphere and non-rhizosphere soils of Q. variabilis planted forests at different stand ages. Moreover, as the stand age increased, the SOC content in both the rhizosphere and non-rhizosphere soils of the planted forests initially decreased and then increased. The TN and TP contents in the rhizosphere and non-rhizosphere soils of Q. variabilis planted forests did not show significant differences across different stand ages, and they exhibited different trends as the stand age increased. ② The SOC and nitrogen to phosphorus ratio (N∶P) exhibited significant rhizosphere effects, whereas the rhizosphere effects of the TN, TP, carbon to nitrogen ratio (C∶N), and carbon to phosphorus ratio (C∶P) were not prominent. In terms of the influence of stand age, the SOC, TN, TP, C∶P, and N∶P were significantly affected. However, the effect of the C∶N at the stand age level was not significant. The interactive effects of soil carbon, nitrogen, phosphorus, and their stoichiometric ratios were all significant. It is recommended to appropriately supplement soil nitrogen and phosphorus to ensure the sustainable development of Q. variabilis forest stand. |
