CAJ | 학술논문

对乌梁素海沉积物现场采样和室内实验分析,研究了乌梁素海表层沉积物30 cm中有机碳空间分布以及碳储量特征,分析了有机碳来源以及总氮、总磷、水生植物、沉积物质地对湖泊沉积物碳固定的影响.结果发现,全湖有机碳密度空间分布明显,总体呈现湖区北部高于南部,在湖心处其密度最高.在垂直剖面上,有机碳含量随着深度递减,表层大于底层.沉积物中C/N比率在9~36之间,平均值为20.2.有机碳有内源和外源,其中外源为主导.乌梁素海沉积物有机碳沉积速率为169.55 g·m-2·a-1,有机碳密度为5.21 kg?m-2,30 cm深度沉积物中,碳储量为134.39×104 t.乌梁素海沉积物固碳能力与总氮存在明显的正相关性,而与总磷没有相关性,说明总氮与有机碳具有同源性,总氮主要以有机氮形态存在.有机碳含量主要吸附在沉积物粘粒中,其中全湖<63μm和63~125μm颗粒中的有机碳含量占总粒径有机碳量的51%和22%.乌梁素海水生植物以芦苇为主,其面积占湖区近1/2,随着近30年来了芦苇面积的增加,促进了沉积物固碳能力.
대오량소해침적물현장채양화실내실험분석,연구료오량소해표층침적물30 cm중유궤탄공간분포이급탄저량특정,분석료유궤탄래원이급총담、총린、수생식물、침적물질지대호박침적물탄고정적영향.결과발현,전호유궤탄밀도공간분포명현,총체정현호구북부고우남부,재호심처기밀도최고.재수직부면상,유궤탄함량수착심도체감,표층대우저층.침적물중C/N비솔재9~36지간,평균치위20.2.유궤탄유내원화외원,기중외원위주도.오량소해침적물유궤탄침적속솔위169.55 g·m-2·a-1,유궤탄밀도위5.21 kg?m-2,30 cm심도침적물중,탄저량위134.39×104 t.오량소해침적물고탄능력여총담존재명현적정상관성,이여총린몰유상관성,설명총담여유궤탄구유동원성,총담주요이유궤담형태존재.유궤탄함량주요흡부재침적물점립중,기중전호<63μm화63~125μm과립중적유궤탄함량점총립경유궤탄량적51%화22%.오량소해수생식물이호위위주,기면적점호구근1/2,수착근30년래료호위면적적증가,촉진료침적물고탄능력.
Based on the on-site sampling and laboratory experiments in Wuliangsuhai Lake, this paper studies the characteristics of the TOC distribution in the 30 cm sediment of and carbon sequestration and the relationship with TN, TP, aquatic plants and sediment texture, as well as the sources of organic carbon. The results showed that the SOC distribution has a certain regularity, in the north Lake is higher than the south, enriched in the middle of lake. On the vertical profile, TOC are decreasing with increasing depth of sediment in the vertical direction. TOC/TN ratios of surface sediments change from 9 to 36, average is 20.2. It related that the source of TOC is mainly to endogenous and exogenous, the exogenous is dominant. Organic carbon deposition rate in the sediment of Wuliangsuhai Lake is 169.55 g?m-2?a-1. Organic carbon density is 5.21 kg?m-2, and carbon stored in 30 cm depth of the sediments, is 134.39×104 t. There are significant positive correlation between TOC and TN, which related that TOC and TN have same source, total nitrogen exist mainly in organic nitrogen forms. TOC content is mainly absorbed in cosmid. The 51%and 22%of TOC content is in the<63μm and 63~125μm cosmids respectively. In the Wuliangsuhai Lake, reeds is the mainly aquatic plants, which measure of area is achieve half of the whole lake area. With increasing of reed area in nearly 30 years, it promoted the sediment carbon sequestration capacity.