Abstract:In order to understand the soil stoichiometry of forests in Moon Mountain, Guizhou Province, the contents of C, N and P in soil collected from five forest types were studied, and their stoichiometry characters. The results showed that the largest variability in surface soil (0-20 cm) was P content, and that in 20-100 cm soil was C content, the smallest was N content. The C, N contents in 0-10 cm soil of 5 forest types were much higher than mean contents in 0-10 cm soil of China lands, while P content was much lower than that. There were significant differences in C, N and P contents between hard broad and soft broad nature forests. Soil C content in hard broad nature forest was bigger than that in soft broad nature forest, while soil N, P contents were diametrical. The soil C:N in hard broad nature forest was significantly greater than that in soft broad nature forest, and the soil C:N in coniferous and broad mixed forest was significantly higher than that in Chinese fir plantation and Pinus plantation. The soil N:P and C:P in hard broad nature forest, soft broad nature forest, coniferous and broad mixed forest decreased with the depth of soil layer. However, the soil C:P and N:P in Chinese fir plantation and Pinus plantation decreased at first then increased and decreased again with depth of soil layer. All of them had accumulation peaks at 30-50 cm layer. Correlation analysis showed that there were significantly positive correlations among contents C, N, and P in 0-100 cm soil, as well as contents of C, N and C:N, C:P, N:P, and P content with C:N. Therefore, the soil nutrient contents and stoichiometry characteristics of five forest types and different soil layers in Moon Mountain are significantly different.
