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以江西省泰和县退化红壤区18年生马尾松纯林(Ⅰ)、马尾松-枫香-木荷混交林(Ⅱ)、木荷纯林(Ⅲ)和枫香纯林(Ⅳ)4种人工林林分为对象,并以自然恢复的无林荒草地为对照(CK),研究其土壤的可溶性有机碳(SOC)、氮(SON),微生物生物量碳(MBC)、氮(MBN)和土壤酶活性的变化.结果表明:在0～10 cm土层,各林分类型的土壤SOC、SON含量分别为354～1007 mg.kg-1和24～73 mg.kg-1,MBC、MBN含量分别为203～488 mg.kg-1和24～65 mg.kg-1,脲酶和天门冬酰胺酶活性分别为95～133 mg.kg-1.d-1和58～113 mg.kg-1.d-1.不同林分类型之间SOC、SON含量为Ⅳ>CK>Ⅲ>Ⅰ>Ⅱ,MBC、MBN含量为CK>Ⅳ>Ⅲ>Ⅰ>Ⅱ,天门冬酰胺酶活性为Ⅳ>CK>Ⅲ>Ⅱ>Ⅰ,差异显著,而脲酶活性没有显著差异.随着土层加深,SOC、SON、MBC、MBN、脲酶及天门冬酰胺酶活性下降.在0～20 cm土层,SOC、SON、MBC、MBN、全碳和全氮两两之间达极显著相关.天门冬酰胺酶活性与SOC、SON、MBC、MBN、TSN、全碳、全氮极显著相关;而脲酶活性与SON、MBC、MBN、TSN、全碳显著相关.
The results showed that there were four kinds of Artificial Pinus massoniana (Ⅰ), Pinus massoniana-Liquidambar formosana-mixed forest (Ⅱ), Pure Hevea brasiliensis (Ⅲ) and Pure Liquid of Liquidambar formosana The forest was divided into two groups. CK and CK were used to study the changes of soil organic carbon (SOC), nitrogen (SON), microbial biomass carbon (MBC), nitrogen (MBN) The results showed that the soil SOC and SON contents in different types of forest were 354 ~ 1007 mg.kg-1 and 24-73 mg.kg-1, MBC and MBN The contents of urease and asparaginase were from 95 to 133 mg.kg-1.d-1 and from 58 to 113 mg.kg-1, respectively, with the contents ranging from 203 to 488 mg.kg-1 and from 24 to 65 mg.kg- The contents of SOC and SON in different forest types were:> CK> Ⅲ> Ⅰ> Ⅱ, MBC and MBN were CK> Ⅳ> Ⅲ> Ⅰ> Ⅱ, and the activity of asparaginase was Ⅳ> CK> Ⅲ> Ⅱ> Ⅰ, while there was no significant difference in urease activity. With the deepening of soil layers, the activities of SOC, SON, MBC, MBN, urease and asparaginase decreased. , SON, MBC, MBN, total carbon and total nitrogen between the two reached a very significant correlation.Aspartase activity and SOC, SON, MBC, MBN, TSN, total carbon and total nitrogen, while urease activity was significantly correlated with SON, MBC, MBN, TSN and total carbon.