华容东湖围栏生态因子的灰关联分析

采用灰色系统关联度分析方法,以空间理论数学为基础,依规范性、偶对称性、整体性和接近性原则,计算并分析了华容东湖围栏12个生态因子的关联度,关联序结果为:总磷总氮氮磷比氨氮浮游植物硝酸氮酸碱度浮游动物水温透明度溶解氧水深。结果表明,总磷、总氮(包括氨氮和硝酸氮)和氮磷比是湖泊水体的优势影响因子。通过灰关联分析发现,围栏内水体水质良好,水体的氮磷比及溶解氧都适于浮游生物的生长繁殖,对围栏养殖鳙鱼苗种天然饵料的培育、增加渔产潜力都有重要作用。

GRAY CORRELATION ANALYSIS ON NET ENCLOSURE ECOLOGICAL FACTORS IN DONGHU LAKE IN HUARONG COUNTY, HUNAN PROVINCE

Based on space mathematical theory, according to the principles of normalization, symplectic symmetry, integrality and accessibility, with the grey system correlation degree analysis method, the correlation degree of 12 pen culture ecological factors in East Lake in Huarong County are calculated and analyzed in this study. The correlation order is as follow: total phosphorus > total nitrogen > phosphorus-nitrogen ratio > ammonia nitrogen > phytoplankton > nitrate nitrogen > pH value > zooplankton > water temperature > transparency > dissolved oxygen > water depth, it shows that the total phosphorus, the total nitrogen (including ammonia nitrogen and nitrate nitrogen), and the phosphorus-nitrogen ratio is the advantage factor in lake water body.The gray correlation analysis shows that the water quality in pen is good, the phosphorus-nitrogen ratio and the dissolved oxygen are suitable for the plankton growing and breeding, it is very important to the bighead for the natural food cultivation and fishery production potential improvement.