水生态因子与鳜的健康关系

应用计算机技术系统研究鳜健康综合指标与6项水生态因子间的关系.实验自2001年7至10月底,面积4.72hm2(16口).采样时间为上午800-900,每两周1次.水生态因子检测依GB11607-89及GB3838-88要求进行.结果表明,在正常养殖条件下,6项水生态因子中鱼塘的水温、水体pH值的变化不大,而溶解氧、铵氮、磷酸盐以及亚硝酸盐等四项水生态因子变化较大,文中求出6项水生态因子间的线性相关系数,为水生态因子的调控提供依据和帮助.研究结果表明,鳜健康指标与6项水生态因子间的关系模型是非线性,如果采用因素幂为3次的模型,回判准确率达89.6%,剩余标准差为12.1,6项水生态因子对鳜健康指标影响程度排序为PO43->NO2->pH>DO>T>NH4+.文中讨论了不同健康指标分段模型判别准确率,并通过该模型求出鳜健康养殖各水生态因子的最佳范围.

Study on the relations between aquatic ecofactors and health of Siniperca chuatsi

The article systemically studied the relations between healthy synthetical index of Siniperca chuatsi and six aquatic ecofactors by computer technology . The experiment was conducted from July to October at Guangdong Province in 2001. The total test area is 4. 72hm2 composed of 16 fish ponds. The samples were collected every two weeks at 8: 00- 9: 00am during the experiment . The aquatic ecofactors were determinated according to GB11607- 89 and GB3838- 88. Results show that the varied ranges of water temperature and pH are narrow, whereas those of other four aquatic ecofactors about dissolved oxygen, total ammonium, phosphate and nitrite are wide under natural breed conditions, The correlation coefficient of six aquatic ecofactors will help aquatic ecofactors to keep under control . Research suggests that Siniperca chuatsi healthy synthetical indexes have nonlinear relations with six aquatic ecofactors. Accuracy rate of forecast on the basis of the pattern was 89. 6% and standard deviation of fitting was 12. 1 if the third power of factors was adopted. Influence of six aquatic ecofactors on Siniperca chuatsi health index in sequence is PO4 3- > NO2 - > pH> DO> T> NH4 . The article discussed the accuracy rate of forecast of various range, and optimal range of aquatic ecofactors in culture was obtained on the pattern.