摘要
本文通过对山东省３８座代表性大、中型水库总氮（ＴＮ）、总磷（ＴＰ）、化学耗氧量、硬度及电导率（λ）五种主要水化因子连续两年（１９８９～１９９０）的调查与研究，探讨了水化因子与水库鱼产力的关系。用反映鲢、鳙生长状况的综合生长指数（ＧＩ）作为水库鱼产力的指标。它与水化因子相关分析表明，总磷是山东省３８座水库鱼产力的主要影响因子。提出ＧＩ与总磷、总氮及电导率等水化因子的逐步回归方程关系非常显著。证明利用水化因子作为水库鱼产力的评价指标是可行的。并指出：同一水库的相同水化因子存在年间差异，其主要原因在于降雨量和水库进水量的不同，鉴于此．同一水库鱼产力也存在年间差异。
This paper deals with the relationships between the major chemical factors and the fish productivity of the reservoirs in Shandong Province based on the investiganons made in 1989 through 1990. Five most important factors (TN, TP, Hd, λand OCD) were selected for investigation in early spring and late fall. The investigated factors of the reservoirs were mostly on a moderate or high level in comparison with the standard of general fresh waters, which in turn showed that the reservoirs are moderate to high in trophic status. It was also found that the)evels of the factors exhibit an obvious. yearly variation, chiefly because of the yearly difference in rainfall and input of water to the'reservoirs. The results of correlation analysis show that TP is the major limiting nutrient in the resvoirs. And the relations between fish growth and levels of the chemical factors may be shown with the following regression equations, GI = 0. 113 + 0. 340TN + 0. 306TP + 0. 215 λ. R = 0. 61,N=37; and GI = - 0. 0392 + 0. 278TN + 0. 252TP + 0. 360Hd + 0. 120COD,R=0. 63 .N= 37: where GI is an index of fish growth, describing fish productivity of the related reservoir. Hence it is feasible to use these factors as the variables assessing fish productivity.
基金
国家教委博士点基金
山东省自然科学基金
关键词
水库
水库养鱼
山东
水化学
Reservoir
Shangong Province
chemical factors
fish productivity
regression analysis
