刺参养殖池塘颗粒悬浮物结构及其沉积作用

对不投饵刺参养殖池塘的颗粒悬浮物结构及其沉积量和沉积速度进行了研究.结果表明:(1)各池塘总颗粒悬浮物重量(TS)为(73.1±20.5)mg/L,变动于46.0～132.0mg/L之间;颗粒无机物(IS)含量为(50.6±12.6)mg/L,变动于28.5～76.5mg/L之间,占总颗粒悬浮物的69.13%;浮游生物干重(PZ)为(0.675±0.706)mg/L,变动于0.064～2.814mg/L之间,其中浮游植物干重(DWP)为(0.541±0.622)mg/L,变动于0.062～2.582mg/L之间,浮游动物干重(DWZ) 为(0.135±0.200)mg/L,变动于0.002～1.160mg/L之间;颗粒腐质为(21.91±19.59)mg/L,变动于4.18～83.86mg/L之间,占总颗粒悬浮物的比例为29.95%.(2)总颗粒物沉积量为(19.44±16.34)g·m-2·d-1,变动于6.33～91.98g·m-2·d-1之间,沉降速度为(0.30±0.30)m·d-1,变动于0.08～1.63m·d-1之间,新生态颗粒有机物沉积量为(5.09±7.30)g·m-2·d-1,变化于0.14～31.27g·m-2·d-1之间,总颗粒物沉积量和新生态颗粒物沉积量均是底层高于表层.

The structure of suspended particles and sedimentation in cultured ponds of sea cucumber, Apostichopus japonicus

The structure of suspended particles and the sedimentary flux and sinking velocity in sea cucumber, Apostichopus japonicus Selenka ponds were studied. The results showed as follows: (1) The concentration of total suspended particular matter (TS) varied from 43.5 to 132.0mg/L with an average of (73.4±20.4)mg/L; The concentration of inorganic particular matter (IS) varied from 29.5 to 76.5mg/L with an average of (50.8±12.3)mg/L was 71.74% in TS; The dry weight of plankton (PZ) varied from 0.07 to 3.74mg/L with an average of 0.68±0.79mg/L was 0.90% in TS. Of which, the dry weight of phytoplankton (DWP) ranged from 0.06 to 2.58mg/L with an average of (0.54±0.62)mg/L was 0.71% in TS, and the dry weight of zooplankton (DWZ) ranged from 0.01 to 1.16mg/L with an average of (0.13±0.20)mg/L was 0.19% in TS. Particular debris and bacteria ranged from 4.24 to 84.15mg/L with an average of (21.91±19.58)mg/L accounted for 27.36% of TS. (2) The sedimentary flux of total suspended particular matter was (19.69±16.66)g · m~(-2) · d~(-1) which varied from 6.33 to 91.98g · m~(-2) · d~(-1); Sinking velocity was 7.56 11.07m d~(-1) which ranged from 0.19 to 23.39g · m~(-2) · d~(-1). The sedimentary flux of nascent suspended particulate matter in the Apostichopus japonicus Selenka ponds was (2.75±8.21)g · m~(-2) · d~(-1),which ranged from 0.19 to 23.39g · m~(-2) · d~(-1). Both the sedimentary flux of total and nascent suspended particulate matter in the bottom of ponds were higher than those in surface water.