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以21 a湿地松纯林为对照,研究了间伐后补植阔叶树(间伐补阔,补植枫香)对不同年限(3、6、9 a)湿地松林分和21 a湿地松×枫香混交林土壤活性有机碳的影响.结果表明:间伐补阔后,6和9 a湿地松林分的土壤可溶性有机碳(DOC)、易氧化有机碳(ROC)和微生物生物量碳(MBC)含量均比21 a湿地松纯林显著增高;21 a湿地松×枫香混交林的土壤各活性碳组分含量显著高于3、6、9 a湿地松林分,其DOC、ROC和MBC含量分别比21 a湿地松纯林增加113.1%、53.3%和54.6%.说明间伐补阔结构调整是改善人工湿地松纯林土壤生态功能的有效措施.
Using 21 a pure Pinus elliottii as control, the effects of replanting broadleaved tree (thinning and broadleaf planting, sweetgum) on Pinus elliottii mixed with different years (3, 6, 9 a) The results showed that the contents of soil dissolved organic carbon (DOC), organic carbon (ROC) and microbial biomass carbon (MBC) in Pinus elliottii plantations were significantly lower The content of soil active carbon in 21 a-wetland-sweetgum-mixed forest was significantly higher than that of 3, 6 and 9a-wetland pine forests, and the contents of DOC, ROC and MBC were 21 and 21 a The pure P. elliottii increased by 113.1%, 53.3% and 54.6%, respectively, indicating that the thinning and widening of the structure adjustment is an effective measure to improve the ecological function of soil in the artificial wetland.