金佛山地区不同生境下土壤有机质与全氮含量及其相关性

Contents and relationships of soil organic matter and total nitrogen under different habitats in Jinfo Mountain

通过对金佛山地区不同生境下土壤有机质和全氮含量的测定表明，0～10cm土层内．有机质含量的顺序为西坡（108．088g／kg）〉南坡（92．229g／kg）〉山顶（89．727g／kg）〉北坡（80．881g／kg）．全氮含量的顺序为山顶（6．482g／kg）〉南坡（92．229g／kg）〉西坡（4．355g／kg）〉北坡（3．928g／kg）．土壤C／N顺序为西坡（24．82）〉北坡（20．59）〉南坡（16．12）〉山顶（13．84）；10～20cm土层内．有机质含量的顺序为山顶（93．895g／kg）〉西坡（70．319g／kg）〉南坡（67．970g／kg）〉北坡（63．255g／kg）．全氯含量的顺序为山顶（5．528g／kg）〉西坡（4．055g／kg）〉南坡（3．867g／kg）〉北坡（3．460g／kg）．土壤C／N顺序为北坡（18．28）〉南坡（17．58）〉西坡（17．34）〉山顶（16．99）。不同生境之间的土壤有机质和全氮含量存在差异，且0～10cm土层高于10～20cm土层。土壤有机质和全氮含量之间呈显著正相关。

The contents of organic matter （OM）, total nitrogen （TN） and C/N ratio of soil under different habitats in Jinfo Mountain were studied and the results showed that the order of OM content in 0 to 10 cm soil layer was west slope（108.088 g/kg）〉south slope （92. 229 g/kg） 〉summit（89.727 g/kg）〉north slope （80. 881 g/kg）. The order of TN content was summit（6.482 g/kg）〉southslope （5. 722 g/kg）〉west slope（4. 355 g/kg）〉north slope （3. 928 g/kg）. The order of C/N ratio was west slope（24.82）〉northslope（20.59）〉southslope（16.12）〉summit （13.84）. While in 10 to20cmsoil layer, the order of OM content was summit（93. 895 g/kg）〉west slope（70. 319 g/kg） 〉 south slope （67. 970 g/kg）〉north slope （63. 255 g/kg）. The order of TN content was summit（5.528 g/kg）〉 west Slope （4. 055 g/kg） 〉south slope （3. 867 g/kg）〉north slope （3. 460 g/kg）. The order of C/N ratio was north slope（18.28）〉south slope （17.58）〉west slope （17.34） 〉summit （16.99）. It could be concluded that the contents of TN and OM were different among different habitats, and TN and OM contents in 0 to 10 cm soil layer were more than that in 10 to 20 cm soil layer. Moreover, the relationship between TN contents and OM contents in different habitats were significantly positive correlated.