论文部分内容阅读
于 1 995— 1 999年采用陆基实验围隔法系统地研究了对虾与鱼、贝类封闭式综合养殖的基础问题 ,所选取的材料为中国对虾、台湾红罗非鱼、缢蛏与海湾扇贝 ,研究出了 4种优化结构养殖模式。结果表明 ,4种模式的组成及各成分间生物量 (收获前 )的比值分别为 :对虾-缢蛏 1∶ 3 ;对虾 -扇贝 1∶ 1 ;对虾 -罗非鱼 1∶ 1 ;对虾 -罗非鱼 -缢蛏 ,1∶ 0 .3∶ 2。所有这些模式的养殖效果都比同样条件下的对虾单养模式显著优越 ;其中最好的虾、鱼、贝三元综合养殖模式将产量提高了 2 8% ,投入氮的利用率提高了 85 %。同时采取封闭式的养殖方法 ,向浅海输出的氮只占养殖输入氮的 6 %— 8% ,从而显著降低了对浅海的污染
In 1995-1999 using land-based experimental enclosure method systematically studied the shrimp and fish, shellfish closed aquaculture basic problems, the selected material for the shrimp, Taiwan red tilapia, emu and bay scallops , Developed four kinds of optimized structure breeding mode. The results showed that the composition of the four patterns and the biomass (pre-harvest) ratio of the components were as follows: 1: 3 for prawn-catfish; 1: 1 for shrimp-scallop; 1: 1 for shrimp-tilapia; Fish - 缢 蛏, 1:0 .3: 2. The results showed that all of these models were significantly superior to shrimp monoculture under the same conditions. The best three-pronged shrimp, fish and shellfish breeding mode increased the yield by 28% and the nitrogen utilization by 85% . At the same time, a closed aquaculture method is adopted, and the nitrogen output to the shallow sea accounts for only 6% to 8% of the input nitrogen of farming so as to significantly reduce the pollution to the shallow sea