中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2014年
4期
1019-1025
,共7页
王毛兰%赖建平%胡珂图%张丁苓%赖劲虎
王毛蘭%賴建平%鬍珂圖%張丁苓%賴勁虎
왕모란%뢰건평%호가도%장정령%뢰경호
碳同位素%氮同位素%有机质%鄱阳湖%沉积物%来源
碳同位素%氮同位素%有機質%鄱暘湖%沉積物%來源
탄동위소%담동위소%유궤질%파양호%침적물%래원
carbon isotope%nitrogen isotope%organic matter%Poyang Lake%sediment%sources
通过对鄱阳湖及其主要入湖河流(赣江、抚河、信江、修水及饶河)15个表层沉积物样品中有机碳(TOC)、氮(TN)、C/N 值、δ13C及δ15N 含量的测定，分析探讨了鄱阳湖及其主支流沉积物有机质和氮素来源.结果表明：鄱阳湖湖区表层沉积物中 TOC 的含量(干重)在0.63%~1.86%之间，平均值为(1.15±0.35)%(n=9)，比其主支流TOC含量高； TN含量变化范围为0.06%~0.16%，平均值为(0.10±0.03)%(n=9)，各入湖河流表层沉积物有机质TN含量处在0.03%~0.08%之间，平均值为(0.06±0.02)%(n=6).鄱阳湖湖区沉积物中有机质的碳、氮稳定同位素变化范围分别为-25.66‰~-12.56‰和3.51‰~6.27‰，平均值分别为(-22.48±4.10)‰和(4.71±0.95)‰(n=9).各入湖河流沉积物δ13C和δ15N值含量范围分别为-25.24‰~-19.55‰和0.94‰~4.64‰，平均值分别为(-23.27±2.42)‰和(3.19±1.30)‰(n=6).有机质来源分析表明：土壤有机质、水生维管束植物和浮游植物是鄱阳湖及其主要入湖河流沉积有机质主要的3种来源，其中土壤有机质的贡献最大；土壤有机质和人工合成肥料是其沉积物氮素主要来源，对于入湖河流来说，人工合成肥料贡献更大.
通過對鄱暘湖及其主要入湖河流(贛江、撫河、信江、脩水及饒河)15箇錶層沉積物樣品中有機碳(TOC)、氮(TN)、C/N 值、δ13C及δ15N 含量的測定，分析探討瞭鄱暘湖及其主支流沉積物有機質和氮素來源.結果錶明：鄱暘湖湖區錶層沉積物中 TOC 的含量(榦重)在0.63%~1.86%之間，平均值為(1.15±0.35)%(n=9)，比其主支流TOC含量高； TN含量變化範圍為0.06%~0.16%，平均值為(0.10±0.03)%(n=9)，各入湖河流錶層沉積物有機質TN含量處在0.03%~0.08%之間，平均值為(0.06±0.02)%(n=6).鄱暘湖湖區沉積物中有機質的碳、氮穩定同位素變化範圍分彆為-25.66‰~-12.56‰和3.51‰~6.27‰，平均值分彆為(-22.48±4.10)‰和(4.71±0.95)‰(n=9).各入湖河流沉積物δ13C和δ15N值含量範圍分彆為-25.24‰~-19.55‰和0.94‰~4.64‰，平均值分彆為(-23.27±2.42)‰和(3.19±1.30)‰(n=6).有機質來源分析錶明：土壤有機質、水生維管束植物和浮遊植物是鄱暘湖及其主要入湖河流沉積有機質主要的3種來源，其中土壤有機質的貢獻最大；土壤有機質和人工閤成肥料是其沉積物氮素主要來源，對于入湖河流來說，人工閤成肥料貢獻更大.
통과대파양호급기주요입호하류(공강、무하、신강、수수급요하)15개표층침적물양품중유궤탄(TOC)、담(TN)、C/N 치、δ13C급δ15N 함량적측정，분석탐토료파양호급기주지류침적물유궤질화담소래원.결과표명：파양호호구표층침적물중 TOC 적함량(간중)재0.63%~1.86%지간，평균치위(1.15±0.35)%(n=9)，비기주지류TOC함량고； TN함량변화범위위0.06%~0.16%，평균치위(0.10±0.03)%(n=9)，각입호하류표층침적물유궤질TN함량처재0.03%~0.08%지간，평균치위(0.06±0.02)%(n=6).파양호호구침적물중유궤질적탄、담은정동위소변화범위분별위-25.66‰~-12.56‰화3.51‰~6.27‰，평균치분별위(-22.48±4.10)‰화(4.71±0.95)‰(n=9).각입호하류침적물δ13C화δ15N치함량범위분별위-25.24‰~-19.55‰화0.94‰~4.64‰，평균치분별위(-23.27±2.42)‰화(3.19±1.30)‰(n=6).유궤질래원분석표명：토양유궤질、수생유관속식물화부유식물시파양호급기주요입호하류침적유궤질주요적3충래원，기중토양유궤질적공헌최대；토양유궤질화인공합성비료시기침적물담소주요래원，대우입호하류래설，인공합성비료공헌경대.
Fifteen surface sediment samples from the Poyang Lake and its main tributaries (Ganjiang River, Fuhe River, Xinjiang River, Xiushui River and Raohe River) were used to investigate organic carbon and nitrogen isotopes. In addition, the sources of organic matter and nitrogen in the surface sediments were analyzed. The total organic carbon (TOC) content in the lake, averages (1.15±0.35)% (n=9) in a range of 0.63% to 1.86%, was higher than that of its main tributaries. The total nitrogen (TN) content in the Poyang Lake area and its main tributaries was in the ranges of 0.06%~0.16% and 0.03%~0.08% with an average value of (0.10±0.03)% (n=9) and (0.06±0.02)% (n=6), respectively. The organic carbon isotope composition (δ13C) ranged from-25.66‰ to-12.56‰ (average (-22.48±4.10)‰), whereas the nitrogen isotope composition (δ15N) was from 3.51‰ to-6.27‰ (average (4.71±0.95)‰) in the Poyang Lake area surface sediments. The δ13C and δ15N values ranged from-25.24‰ to-19.55‰ (average (-23.27±2.42)‰) and 0.94‰ to 4.64‰ (average (3.19±1.30)‰) in the main tributaries surface sediments, respectively. Soil organic matter, aquatic vascular plant and phytoplankton were the main sources of the sediment organic matter in the Poyang Lake and its main tributaries, while the contribution of soil organic matter was biggest. The sources of nitrogen in the sediment were mainly from soil organic matter and synthetic fertilizer. The contribution of synthetic fertilizer was found to be a significant source for the tributaries sediment.
