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于1998年6～9月间在鱼虾混养围隔中 ,研究了在全封闭条件下 ,水体中总无机氮(TIN ,表示3种无机氮之和 )及其组分的浓度以及3种组分相对含量的变化与鱼虾放养密度及其他环境因子 (叶绿素、化学耗氧量 (COD)、溶解氧 (DO)、水温、盐度、pH等 )的相互关系。结果表明 :TIN及其组分的绝对含量与对虾和罗非鱼的放养密度呈极其显著的正相关。TIN及其组分的绝对含量与水温有正相关性 ,但相关性不显著 ,而与pH、盐度呈负相关 ,且这种负相关性有随放养密度增加而提高的趋势。叶绿素与TIN及其组分的绝对含量无明显相关性 ,但其影响氨氮、硝氮在TIN中的相对含量。DO与TIN及其组分的绝对含量及氨氮的相对含量表现为负相关 ,而与硝氮的相对含量呈正相关。COD与TIN、三氮的关系比较复杂。
In the confluence of fish and shrimp from June to September 1998, the concentrations of total inorganic nitrogen (TIN, the sum of three kinds of inorganic nitrogen) and their components in water and three components The changes of relative contents of the components and the stocking density of fish and other environmental factors (chlorophyll, chemical oxygen demand (COD), dissolved oxygen (DO), water temperature, salinity, pH, etc.). The results showed that the absolute content of TIN and its components was extremely significantly positively correlated with the stocking density of shrimp and tilapia. The absolute content of TIN and its components had a positive correlation with water temperature, but the correlation was not significant, but negatively correlated with pH and salinity, and this negative correlation tended to increase with the increase of stocking density. Chlorophyll has no obvious correlation with the absolute content of TIN and its components, but it affects the relative content of ammonia nitrogen and nitrate nitrogen in TIN. The absolute content of DO and TIN and their components and the relative content of ammonia nitrogen showed a negative correlation with the relative content of nitrate nitrogen. COD and TIN, the relationship between the three nitrogen more complicated.