浙江省湖州地区养殖容量模型的构建及评估研究

Construction and Evaluation of Aquaculture Capacity Model in Huzhou,Zhejiang Province

为有效减轻传统水产养殖对水环境造成的负面影响,评估了湖州市南浔区5种主要养殖品种的单位产量的排污量,然后以磷环境承载力为限制指标,以经济效益为优化目标,构建区域养殖容量模型。结果显示(1)该区域TP为水体限制营养因子,属于II-III类水;(2)常规鱼、大口黑鲈、乌鳢、翘嘴红鲌和黄颡鱼的磷排污系数分别为0.25 g/kg、0.72 g/kg、0.88 g/kg、0.32 g/kg和0.63 g/kg;(3)养殖容量分别为31368.4 t、9396.8 t、3160.8 t、14412.0 t和5678.8 t。以期为指导该区域生态渔业发展提供科学依据。

In order to effectively alleviate the negative impacts of traditional pond aquaculture on the surrounding water environment,this study evaluated nutrient emissions per unit yield of 5 main farming kinds.Taking the phosphorus environmental carrying capacity as the limiting index,the aquaculture capacity model was constructed.The results showed that(1)total phosphorus in this area was a limiting nutrient factor and belonged to water quality II-III grade;(2)Conventional fish,m.salmoides,o.argus cantor,e.ilishaeformis and p.fulvidraco were 0.25,0.72,0.88,0.32 and 0.63 g/kg,respectively.(3)The optimized carrying capacity was 31368.4 t,9396.8 t,3160.8 t,14412.0 t and 5678.8 t,respectively.The above research can provide scientific guidance for local ecological fishery development.