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采用时空替代法,选取4,12,19,24,29 a橡胶林,研究不同树龄土壤微生物生物量碳含量的分布特征及其与有机碳含量的比值、以及与土壤养分含量的相关关系。结果表明:4,12,19,24,29 a橡胶林不同土层微生物生物量碳含量在28.87～138.71mg/kg之间,随土层深度的增加明显下降;土壤微生物生物量碳含量和有机碳的比值在0.66%～2.10%之间,土壤碳处于积累状态;土壤微生物生物量碳含量与有机碳、全氮、全磷含量有显著的相关性,相关系数R>72%。
Using time-space substitution method, 4,12,19,24,29 a rubber plantations were selected to study the distribution characteristics of soil microbial biomass carbon at different ages and their ratios to organic carbon, as well as their relationships with soil nutrient contents. The results showed that the biomass carbon content of different soil layers of 4, 12, 19, 24, 29 a rubber plantation ranged from 28.87 to 138.71 mg / kg, and decreased with the soil depth increasing. The soil microbial biomass carbon content and organic Carbon ratio was between 0.66% and 2.10%, and soil carbon was in accumulation. Soil microbial biomass carbon content was significantly correlated with organic carbon, total nitrogen and total phosphorus, with a correlation coefficient R> 72%.