采用TPTZ (2,4,6-三吡啶-s-三嗪，C₁₈H₁₂N₆ )方法对2021年12月茅尾海表、底层海水中溶解态单糖（MCHO）、多糖（PCHO）和总糖（TCHO）浓度进行测定，并对其分布特征及影响因素进行了研究。结果表明，茅尾海MCHO、PCHO和TCHO平均浓度及范围分别为15.15 (2.40~38.40)、13.19 (3.92~38.40)和28.34 (11.52~76.80) μmol C·L ^-1。TCHO占溶解有机碳(DOC)浓度平均比例为40.2 ± 10.8%，表明TCHO是DOC的重要组成部分。MCHO占TCHO的浓度平均比例为52.9 ± 12.2%，表明MCHO是TCHO的主要存在形式。茅尾海表、底层MCHO、PCHO和TCHO浓度水平分布均呈现由河口向外海逐渐递减的趋势。表层MCHO、PCHO和TCHO与盐度呈显著负相关(p< 0.01)，与叶绿素a(Chl-a)呈显著正相关(p< 0.05)；底层MCHO和TCHO与盐度呈显著负相关（p< 0.01），TCHO与Chl-a呈显著正相关（p< 0.05），表明陆源输入和浮游植物自生产是控制冬季茅尾海溶解碳水化合物分布的主要影响因素。

The concentrations of dissolved monosaccharides (MCHO), polysaccharides (PCHO), and total carbohydrates (TCHO) in surface and bottom seawater of the Maowei Sea in December 2021 were determined by 2,4,6-tripyridyl-s-triazine (TPTZ) method, and their distribution characteristics and influence factors were studied. The results showed that average (range) concentration of MCHO, PCHO and TCHO in the Maowei Sea were 15.15 (2.40~38.40), 13.19 (3.92~38.40) and 28.34 (11.52~76.80) μmol C·L ^-1, respectively. The average proportion of TCHO in dissolved organic carbon (DOC) was 40.2 ± 10.8%, suggesting that TCHO was an important component of DOC. The average proportion of MCHO in TCHO was 52.9 ± 12.2%, indicating that MCHO was the main form of TCHO. The horizontal distributions of MCHO, PCHO, and TCHO both in surface and bottom seawater displayed a decreasing trend from the river mouth to offshore. The concentrations of MCHO, PCHO, and TCHO were negatively correlated with salinity (p < 0.01), and positively correlated with chlorophyll a (Chl-a) in the surface seawater. The concentrations of MCHO and TCHO were negatively correlated with salinity (p < 0.01), while TCHO was positively correlated with Chl- a in the bottom seawater, suggesting that terrestrial inputs and biogeochemical processes were the main factor affecting the distribution of dissolved carbohydrates in the Maowei Sea during winter.