基于滤食鱼类天然产力的安康库区生态负荷量测定

Ecological Carrying Capacity in Reservoir Area of Ankang:Based on Natural Production of Filter-feeding Fish

为厘清汉江水体鱼类集约养殖与生态负荷量的关系,测定安康库区滤食性鱼类天然鱼产力,测算Ⅱ类水质限定条件下的安康库区生态负荷量,并与以水体磷含量为标准的计算结果比较。结果表明,设定网箱深度3 m,单位水体生态负荷量为193.44 g/m^3,总产量控制为10.47×10~4t。库区网养单产为100 kg/m^3时,网箱养殖面积控制为1.93‰,网箱生态养殖面积与单位面积产量呈反比。

To clarify the correlation between intensive aquaculture and ecological carrying capacity, natural productivity of filter-feeding fish was calculated first, then the ecological carrying capacity was calculated under water quality standard of grade 11 in reservoir area of Ankang, and the results were compared with the data calculated based on the phosphorus content in water. The results showed that when the cage depth was 3 m, ecological fish carrying capacity was 193.44 g/m3 and the total output should be within 10.47110＇ t. When the yield of cage cuhure was 100 kg/m3, the cage area should be within 1.93‰, and ecological aquaculture area had a negative correlation with the yield per unit area.