| Impacts of different forest type on soil fertility in the subtropical forest ecosystems were studied by comparing the physical and chemical properties of soil of broad leaved mixed forest, Pinus massoniana stand, Cunninghamia lanceolata stand, Phyllostachys edulis forest, as well as mixed broadleaf-conifer forest in Guangdong JiaoLing Changtan Provincial Natural Reserve．Results indicated that：(1)The soil was acid ,the content of rock fragment ,soil bulk densities were 4.0%,1.11 g.cm-3,soil total porosities were 58.01％，of which the soil non-capillary porosities and capillary porosities were 37.73％,20.28％；soil moisture, maximum capillary capacity and minimum capillary capacity were 296.02 g/kg、442.95g/kg、321.38g/kg,respectively,with the cation exchange capacity, electrical conductivity were 5.99 cmol (+)/Kg～8.20 cmol(+)/Kg , 57.87～97.44 and total N were 1.88g/kg, available nitrogen were 105.20 mg/kg, total P were 0.19g/kg,available P was 2.22mg/kg, available K was 130.53mg/kg.(2)it is various in the different forest type that is soil rock fragment ,soil bulk densities, maximum capillary capacity, total N, available nitrogen, available K but there are no difference in soil Ph value, total P and available P, while there were significantly difference in soil rock fragment ,soil bulk densities, maximum capillary capacity((p=0.021，p=0.022)) between mixed broadleaf-conifer forest and broad leaved mixed forest , significantly difference in total N, available nitrogen, available K ((p=0.026，p=0.032)) between mixed broadleaf-conifer forest ,broad leaved mixed forest and Pinus massoniana.(3) Soil fertility and quality of mixed broadleaf-conifer forest ,broad leaved mixed forest and Phyllostachys edulis were better than that of Pinus massoniana and Cunninghamia lanceolata. based on its soil physical and chemical properties. |
