This paper presents an incubation experiment with sediment cores from the Changjiang Estuary Mud Area (CEMA) to quantify the release of nutrients due to simulated resuspension. The results show that except for nitrate (NO₃⁻-N), phosphate (PO₄³⁻-P), ammonium (NH₄⁺-N), nitrite (NO₂⁻-N) and silicate (SiO₃²⁻-Si) were released from the sediment to the overlying water, primarily due to desorption (P), dissolution (SiO₃²⁻-Si) and mineralization (NH₄⁺-N) with only minor direct contributions from the sediment pore water. The significant release of nutrients by resuspension and subsequent processes can alleviate the phosphorus and silicon limitation in water bodies, enhance the growth of phytoplankton, and thus promote the oxygen consumption and ultimately lead to hypoxia. The results of this study are highly relevant for many coastal areas in other parts of the world with large amounts of stored organic matter and nutrients in sediments and frequent perturbation by storm events.

本文提出了利用长江口泥浆区（CEMA）的沉积物芯进行的孵化实验，以定量模拟重悬过程中养分的释放。结果表明，除硝酸盐（NO ₃ ^- -N），磷酸盐（PO ₄ ^3- -P），铵（NH ₄ ⁺ N），亚硝酸根（NO ₂ ^- N）和硅酸盐（SIO ₃ ^2- - Si）从沉积物中释放到上覆水中，这主要是由于解吸（P），溶解（SiO ₃ ^2- -Si）和矿化（NH ₄ ⁺-N）仅来自沉积物孔隙水的少量直接贡献。通过再悬浮和后续过程大量释放养分可以减轻水体中磷和硅的限制，增强浮游植物的生长，从而促进耗氧量并最终导致缺氧。这项研究的结果与世界其他地区的许多沿海地区高度相关，这些沿海地区的沉积物中有机物和营养物质的存储量很大，并且经常受到风暴事件的干扰。