人为干扰对秋浦河河滩湿地土壤碳组分的影响

Influence of Man Made Interference on Carbon Fraction of Benchland Wetland soil of Qiupu River

分层采集秋浦河下游河滩天然湿地及围垦农田(人为干扰地)土壤,分别测定土壤有机碳(SOC)含量、溶解性有机碳(DOC)含量、pH值及含水率。结果表明,土壤SOC平均含量为25.38±6.18g/kg,其中天然湿地土壤SOC含量高于人为干扰地;人为干扰地土壤DOC/SOC平均占比较高,加速了土壤中的SOC流失;土壤SOC与DOC含量呈显著正相关,相关系数为0.255(P<0.05),土壤SOC含量与新鲜土壤含水率呈极显著正相关,相关系数为0.472(P<0.01),说明水分含量是影响土壤SOC含量的重要因素。

The samples of soils of benchland wetland and reclaimed farmland of lower reaches of Qiupu River is taken for the analysis of SOC,DOC,pH value and moisture content.The results show the average SOC is 25.38±6.18g/kg,SOC of natural wetland soil is higher than that of man-made interfered land;the higher average percentage of DOC/SOC accelerates the erosion of SOC;SOC and DOC in soils presents significant positive correlation,which indicates moisture content plays an important role in influencing SOC of soils.