Soil Organic Carbon Density and Contributing Factors of Three Forest Types in Different Succession Stages
To evaluate soil organic carbon storage and provide theoretical basis for carbon sink management,the study was conducted to detect the characteristics of soil organic carbon accumulation of the three forest types in different succession stages.Tilia Pinus Koraiensis of two different stages and secondary poplar birch forest in the same slope position were selected as the research objects.Soil organic carbon density(SOCD)and active organic carbon distribution characteristics of three types of forest soil were detected.The correlation between SOCD and soil organic carbon(SOC),dissolved organic carbon(DOC),microbial biomass carbon(MBC),total nitrogen(TN),available nitrogen(AN),bulk density(BD),as well as other basic properties were analyzed.The results showed that SOCD of the soil in three types of forest all decreased with the deepening of the soil layers.In the soil layer of 0-30 cm,SOCD of secondary poplar birch(SPB)was the highest[(17.11±1.13)kg/m2)];the mature forest of Tilia Pinus Koraiensis(MTP)was the middle[(14.69±1.31)kg/m2];and the young forest of Tilia Pinus Koraiensis(YTP)was the lowest[(12.06±1.26)kg/m2],and there were significant differences among the tree types(P＜0.05).SOCD was marked highly significant positive correlation with SOC,DOC and AN(P＜0.01),and significant positive correlated with TN,POR and C/N(P＜0.05).Compared with the MTP and YTP,SPB was more conducive to the sequestration of soil organic carbon.SOC,DOC and AN had highly significant effect on SOCD;TN,POR and C/N had significant effect on SOCD.
万方数据
维普
