虾蛏混养池底泥耗氧速率的初步研究

The Sediment Oxygen Demand in the Integrated Prawn and Solenidae Ponds

本研究探讨了不同水温和有机质含量对不同养殖模式底泥耗氧速率的影响。通过采集试验前后池塘不同位点的底泥沉积物,对单养对虾和虾蛏混养两种模式下底泥耗氧速率作了初步研究。结果表明:在两种模式下底泥耗氧速率y都随着温度t的升高而升高,且呈良好的幂指数相关(虾蛏混养池y和t的关系式为:y=0.1525e0.0717x,R2=0.968,P<0.01,对虾单养池y和t的关系式为:y=0.1591e0.0816x,R2=0.971,P<0.01);底泥耗氧速率与有机质相关性显著(P<0.05);对不同养殖模式下虾塘底泥耗氧速率分析表明:虾蛏混养池与对虾单养池的底泥底泥耗氧速率差异极显著(P<0.01);在相同养殖模式下,试验初期底泥耗氧速率小于后期底泥耗氧速率。在相同时期,单养虾池塘底泥耗氧速率高于虾蛏混养池塘底泥耗氧速率。

The effects of different water temperature and organic materials on Sediment Oxygen Demand （SOD） in different prawn ponds were studied in this paper. The sediments from ponds in different sites were collected for the study of SOD in prawn monocuhure pond and polycuhure ponds with prawn and solenidae. The results showed that under two different aquaculture patterns, SOD increased as the experimental temperature increased, showing the power law model （prawn and clam polycuhure ponds, the equation is y=0.1525^e0.0717x, R^2=0.968, P〈0.01, prawn monocuhure pond prawn monocuhure pond is y=0.1591e^0.0816x , R^2=0.971, P〈0.01）. The SOD of sediment increased linearly with organic matter content （P〈0.05）. Under different breeding modes, the discrepancy of SOD between prawn single ponds and mixed ponds is highly significant （P〈0.01）. Under the same breeding mode, SOD at beginning of the trials is less than that at late-stage. In the same breeding time, the SOD of prawns in single ponds is more than that of mixed ponds.