虾塘沉积物—水界面的营养盐扩散通量及其在养殖季节的变化

以自行设计的方法测定了对虾养殖环境中沉积物-水界面的营养盐扩散通量。结果表明，营养盐自底质向养殖水体的扩散贯穿于整个对虾养殖季节；该扩散通量的最大值出现在养殖后期的有机质污染区，即投铒区；在污染区，养殖后期的扩散通量大大高于养殖前期，但在非污染区却未见其随养殖季节的明显差异；污染区的扩散通量始终高于非污染区，且随养殖时间的推移，该差异逐渐增大。此外，还比较了新、旧虾塘之间的营养盐扩散通量的差异。初步探讨了底质溶出营养盐对对虾养殖环境的影响。

DIFFUSION FLUX OF NUTRIENT SALTS BETWEEN SEDIMENT AND WATERS IN SHRIMP POND AND ITS SEASONAL CHANGE

Nutrient salt diffusion fhixes between sediment and waters in shrimp pond weredetermined with On-the-spot simulating mathod devised by the authors. The results showed thatnutrient salts were hoved from sediment to waters in all culture scasons. The diffusion fluxesincreased with culture seasos at areas polluteted by feed remains. The largest value was determinedat polluted areas in later stage of shrimp culture. But there was no difference in unpollutal areas. The difference beween diffusion fluxes of new and aged ponds are discssed in this paper.