| Soil microbial plays a significant role in ecosystem which is the main index to evaluate soil quality and soil microbial diversity is the important one of global diversity. Exploring the effect of forest restoration approaches on soil microbial community can provide scientific bases for systemic and impersonal assesement of forest restoration approaches and the restoration practice of degarded ecosystems.In the studies, three typical restoration approaches were studies in hilly red soil region of Southern China. They were artificial slash pine forest, artificial massion pine forest and natural secondary forest. In the studies, plant species diversity, soil physical and chemical properties, soil microbial biomass, and soil microbial community diversity were measured in the above forest ecosystems. Through the above measurements, soil fertility and soil microbial diversity of three forest ecosystems were researched. Results showed that:â‘ The tree diversity, shrub diversity and herb diversity of artificial slash pine forest, artificial massion pine forest and natural secondary forest were 0.07, 2.49, 4.81,0.07, 2.90, 2.40,1.52, 1.55, 3.25 respectively. Compared with the two artificial forests, natural secondary forest had a complex succession tendency. Soil water content and bulk density under three forests were 22.17%, 2.1974 g/cm~3; 21.71%, 2.1527 g/cm~3; 16.76%, 2.0208 g/cm~3 respectively which indicated natural secondary forest possessed preferably soil water holding capacity and physical quality. â‘¡Soil total nitrogen, available nitrogen, total phosphorus, available phosphorus, soil organic carbon were 0.64 g/kg, 72.63 mg/kg, 0.15 g/kg, 0.58mg/kg, 8.80 g/kg, 0.68 g/kg, 74.14 mg/kg, 0.16 g/kg, 0.57mg/kg, 9.01 g/kg,0.76 g/kg, 81.90 mg/kg, 0.23g/kg, 0.80 mg/kg, 9.72 g/kg respectively. Natural secondary forest all dominated the above four indexes which indicated the soil fertility under natural secondary forest was...
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