In this project, we build up the ecological aquaculture system to cultivate Paralichthys olivaceus、Ulva lactuca、Caulerpa lentillifera、 Ulva linza、Litopenaeus vannamei and Botryocladia leptopoda. According to the results of experiment 1, the growth performance of Paralichthys olivaceus demonstrate that there is no significant difference between groups. The growth performance of Ulva lactuca, the group 1000g/m2 demonstrate that the weight gain rate of experiment group was better than the weight gain rate of control group. The growth performance of Litopenaeus vannamei, the weight gain rate of experiment group was better than the weight gain rate of control group.
In the experiment 2, we add light intensity as an experimental factor. According to the results of the weight gain rate, Paralichthys olivaceus demonstrate that the group Shade50 was better than the values of group Shade0 and Shade90. Litopenaeus vannamei, the weight gain rate of Shade0 and Shade50 were better than the values of group Shade90. The weight gain rate of Caulerpa lentillifera, group Shade50, 500g/m2 was better than the values of other groups. The weight gain rate of Botryocladia leptopoda, group NET0, 500g/m2 was better than the values of other groups.
On the other hand, the benefit of water saving, take this experiment as an example, the water volume of the aquaculture facility was 4 ton per pond (2.8m*2.3m*0.65m). We compose 4 ponds as an group, and change the water 4 times per day, it means that each group needs 16(4 ton *4 times) tons of water per day. If cultivate without the system, but cultivate same species and using the same size of aquaculture facilities, the water consumption will be 64 (4 ponds*4 tons*4 times) tons per day. Therefore, cultivate with the ecological aquaculture system may saving 48 tons of water per day. It means the effectiveness of water saving can reach 75%.