The Impact Of Swimming Crab Lava Rearing On Pond's Nitrgen And Phosphros Flux

This study is designed to analysis the impact of swimming crab laver rearing to the sediment of the pond by simulating field observations and laboratory experiments. We tested the DIN and phosphorous flux of the pond sediment in which the lava of the swimming crab is in its zoea phase and anaphase of M. By lab simulating experiments we also testing how pH Temperature and Eh affecting the sediment-water flux of nutrition. the use of self-designed in our laboratory without disturbance sediment collector collecting sediment samples to detect various types of inorganic nitrogen , reactive phosphorus in the sediment interstitial water of the vertical distribution; through years of different nursery pond sediment soil total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP) analysis, discussed the TN, TP and TOC, correlation; so as to guide three trituberculatus nursery industry in earthen ponds provide a theoretical basis for sustainable development.By testing the Z1 phase of 7 Year and 4 Year's pond, which are different in the rearing age, we now know the flux of NH⁴⁺-N,NO^2--N,NO^3--N,DIN in 7 year's pond is 196.52,1.18,50.69,248.39μmol·m-2·d-1 respectively. And in 4 year's pond, it is 168.55,0.14,15.57,184.26μmol·m-2·d-1 .The relatively old age pond is high in DIN flux, NH⁴⁺-N occupied a huge part of the DIN sediment-water flux, about 79.12%～91.47%. The flux of the phosphorous is in the same round.The flux of DIN and H2PO4ˉis increased when the temperature is high. pH can also affected the DIN flux : Neutral>basic>Acid. The flux of NH⁴⁺-N is inceased if there is an anaerobic environment. Flux of DIN is restricted is the Biological inhibitors is added. While the flux of phosphorous is increased once the HgCl is added in.In May 2007 and May 2008 two time points columnar sediment pore water concentrations of DIN and H2PO4ˉgenerally when the performance is less than the vertical depth of 10cm showed a significant reduction. Due to chance, found a talented woman worm may be by way of a hazard of sediment disturbance on the changing role of nutrients, especially nitrogen content to influence the water quality.Derived from the correlation analysis, nursery pond sediment TN and TOC in a significant positive correlation (R∈[0.94,0.99] P <0.05), TP was negatively correlated with the TOC, but the...