中文摘要：

利用1991年在江西省泰和县严重退化的丘陵红壤区建立的长期森林恢复实验基地,以自然恢复的荒草地为对照,分析了湿地松纯林、枫香纯林、湿地松-枫香混交林3种植被类型造林19年后土壤养分和微生物群落数量的变化.结果表明：枫香纯林和湿地松-枫香混交林的土壤有机碳含量（15.16±3.53和16.42±0.49g·kg^-1）显著高于荒草地（9.30±1.13g·kg^-1）;土壤全磷含量表现为荒草地（0.30±0.02g·kg^-1）〉湿地松-枫香混交林（0.22±0.04g·kg^-1）〉枫香纯林（0.14±0.01g·kg^-1）;土壤有效磷含量为枫香纯林（1.66±0.02mg·kg^-1）、湿地松-枫香混交林（2.47±0.27mg·kg^-1）和湿地松纯林（1.15±0.71mg·kg^-1）显著高于荒草地（0.01±0.00mg·kg^-1）;土壤的微生物总数、细菌数量及百分比、土壤无机解磷菌和有机解磷菌数量均为枫香纯林、湿地松-枫香混交林显著高于湿地松纯林和荒草地;真菌数量及百分比、放线菌百分比为枫香纯林、湿地松-枫香混交林显著低于荒草地;土壤有机碳含量与细菌百分比呈极显著正相关,与真菌和放线菌百分比呈显著负相关;土壤有效磷与有机解磷菌数量呈显著正相关,与无机解磷菌数量不相关.枫香纯林和湿地松-枫香混交林可以作为亚热带退化红壤区植被恢复的推荐模式.

英文摘要：

Taking the long-term reforestation experimental base established in a severely degraded urally restored grassland as the control. The soil organic carbon content in the L. formosana and P. elliottii-L, formosana forests （ 15.16±3.53 and 16.42±0.49 g·kg^-1, respectively） was signifi- candy higher than that in the control （9.30±1.13 g·kg^-1）, the soil total phosphorus content was in the order of the control （0.30±0.02 g·kg^-1） 〉 P. elliottii-L, formosana forest （0. 22±0. 04 g·kg^-1） 〉 L. formosana forest （0.14±0.01 g·kg^-1 ）, while the soil available phosphorus content was 1.66±0.02 mg ·kg^-1 in L. formosana forest, 2.47±0.27 mg·kg^-1 in P. elliottii-L, formosa- na forest, and 1.15±0.71 mg·kg^-1 in P. elliottii forest, being significantly higher than that in the control （0.01±0.00 mg·kg^-1）. The total amounts of soil microbes, the amount and percentage of soil bacteria, and the amount of inorganic and organic phosphate-solubilizing microbes in L. formo-sana forest and P. elliottii-L, formosana forest were all significantly higher than those in P. elliottii forest and the control, while the amount and percentage of soil fungi and the percentage of soil acti- nomycetes in L. formosana forest and P. elliottii-L, formosana forest were significantly lower than those in the control. The soil organic carbon content was significantly positively correlated with the percentage of soil bactera, but negatively correlated with the percentage of soil fungi and actinomy- cetes, while the soil available phosphorus content was significantly positively correlated with the amount of organic phosphate-solubilizing microes, but not with the amount of inorganic phosphate- solubilizing microbes. It was suggested that L. formosana forest and P. elliottii-L, formosana forest could be the recommended reforestation models in sub-tropical degraded red soil region.