论文部分内容阅读
中国对虾和黑鲷混养生态系中几种主要细菌的动态变化研究结果表明 ,养殖初期 ,鱼虾混养池水体中异养菌总量和硝酸盐还原菌数量较低 ,但高于对照的对虾单养池 .随着养殖时间的推移 ,对照池的两种菌的菌量急剧增加 ,8、9月份菌量仍维持在较高水平 ;而混养池的菌量在高温季节虽有增加 ,但仍保持在 10 4 cells·ml-1范围内 ,增长幅度远远低于对照池 ,且 9月底开始下降 .底泥中的细菌数量与水体中细菌有相似的变化规律 ,但一般高于同期水中菌量 1～ 2个数量级 .混养池中的弧菌数量一直低于同期对照池 .可见 ,鱼虾混养可通过对养殖生态系中细菌的激活和调节作用 ,调节生态系统的物质循环 ,使其保持高速、稳定运行 ,为对虾生长提供一个健康而稳定的环境 ,同时增加综合养殖效益
The results showed that the total amount of heterotrophic bacteria and nitrate-reducing bacteria in the aquaculture ponds was lower at the early stage of aquaculture, but higher than that of the control Shrimp single pond.With the passage of farming time, the control pool of two kinds of bacteria increased sharply in August and September, the amount of bacteria remained at a high level; and polyculture pool bacteria in the hot season, although there is an increase , But remained at the level of 10 4 cells · ml-1, the growth rate was far lower than that of the control cell and began to decline at the end of September.The number of bacteria in the sediment had the similar variation with that of bacteria in water but was generally higher than In the same period, the quantity of bacteria in water was 1-2 orders of magnitude, and the number of vibrios in the polyculture tank was always lower than that in the same period, showing that the polyculture of fish and shrimp can regulate the ecosystem material through the activation and regulation of bacteria in the culture ecosystem Cycle, to keep it high-speed, stable operation, provide a healthy and stable environment for shrimp growth, while increasing the effectiveness of integrated breeding