【摘要】 对盐碱池塘单养鲢和罗非鱼的实验围隔中颗粒物的沉积量和沉降速度进行了测定。结果表明 ,实验期间总颗粒物的沉积量变动范围为 0 73～ 1 2 4 5 83g/ (m2 ·d) ,沉降速度为 0 70～ 30 86m/d。总颗粒物沉积量和沉降速度均是有鱼围隔显著大于无鱼围隔。盐碱池塘围隔生态系统新生态颗粒有机物的沉积量变化范围为 0 43～ 94 2 2 g/ (m2 ·d)。下层沉积物收集器中悬浮底泥含量大于表层。养鱼与否对水域生态系统的颗粒物沉降动力学过程具有重要影响 ,养鱼池颗粒物质的沉积量是很大的。各围隔的颗粒氮和颗粒磷含量在两次采样中均是养鱼围隔大于无鱼围隔更多还原

【Abstract】 The sedimentary flux and sinking velocity of suspended particulate matter in enclosures with silver carp and tilapia in saline alkaline ponds were measured The results showed that the sedimentary flux of total suspended particulate matter varied from 0 73～1245 83 g/(m 2·d) with a sinking velocity of 0 70～30 86 m/d The sedimentary flux and sinking velocity of total suspended particulate matter in the enclosures with fishes were significantly greater than that of the enclosures without fish The sedimentary flux of real sedimentation suspended particulate matter in the enclosures of saline alkaline ponds ranged from 0 43～94 22 g/(m 2·d) There were higher resuspended mud contents in bottom of sedimentation traps than that of surface ones. Fish culture impacted strongly the sedimentation dynamics of suspended particulate matter in water bodies The sedimentary flux in ponds with fish was very great The concentrations of particulate phosphorus and particulate nitrogen in experimental enclosures with fishes were higher than that of the control enclosures更多还原