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为研究辽河三角洲湿地的固碳能力,2010年5月在辽河三角洲双台子河口东侧的两个翅碱蓬湿地区域采取7个柱状样,通过对样品的化学分析测试,并利用210Pb测年法确定的沉积速率研究了土壤对碳的扣留速率,其结果表明:有机碳浓度分别与各营养元素浓度间有显著的正相关关系(p<0.01),指示沉积物中的有机物质对营养元素有很强的富集能力,同时营养元素促进植物的生长,从而影响土壤碳的加积速率。研究区总碳浓度范围为10.5~14.6 g/kg,其中约83%为有机碳,其相应的土壤对总碳和有机碳扣留速率分别为98.02~260.37 g/m2/a(均值171.84 g/m2/a)和81.17~229.98 g/m2/a(均值141.29 g/m2/a)。本研究区,土壤对碳的扣留速率主要受土壤的沉积速率控制,并与高程有显著的相关关系(p<0.01)。土壤对碳扣留机制的研究有助于加深对全球碳循的理解。
In order to study the carbon sequestration ability of the Liaohe Delta wetlands, seven columnar samples were collected from the wetlands of two Shanyi Peng wetlands on the eastern side of the Shuangtaizi estuary in the Liaohe River Delta in May 2010. The samples were analyzed by chemical analysis and 210Pb dating Sedimentation rate The rate of carbon retention in soils was studied. The results showed that there was a significant positive correlation (p <0.01) between organic carbon concentrations and nutrient concentrations, indicating that organic matter in sediments had a strong effect on nutrients Enrichment ability, while nutrition elements promote the growth of plants, thus affecting the soil carbon accumulation rate. The total carbon concentration in the study area ranged from 10.5 to 14.6 g / kg, of which about 83% were organic carbon. The corresponding rates of soil total carbon and organic carbon retention were 98.02-260.37 g / m2 / a (mean 171.84 g / m2 / a) and 81.17 ~ 229.98 g / m2 / a (mean 141.29 g / m2 / a). In this study area, the retention rate of soil carbon was mainly controlled by soil deposition rate, and had a significant correlation with elevation (p <0.01). Research on soil carbon sequestration mechanisms helps deepen understanding of global carbon sequestration.