The test results showed that the weight of mud crabs (Scylla spp.) was 41.3±11.6 g and the carapace width was 5.6±0.5 cm. The juvenile crabs were cultured for 152 days. The photoelectric floating raft pond (Experimental group, EG ) mud crab was cultivationed weigh 567.3±110.4 g and the carapace width was 14.3±1.5 cm. ; The non-photoelectric floating raft pool (Control group, CG) mud crab weight was 468.7±103.2 g, and the carapace width was 12.4±1.1 cm.
The total growth rate of floating raft photovoltaic cells (EG ) was 48.4 %, and the total growth rate of non-photoelectric floating raft ponds (CG) was 34.8 %. At the beginning of the experiment, the dissolved oxygen in the water in the experiment group was lower than 5 ppm, while the control group maintained above 5 ppm.
During the experiment, the pool water temperature of the experimental group was slightly lower than that of the control group. The two groups of ammonia (NH4+ ) were mostly maintained at 0 ppm, and nitrous acid (NO2-) reached the highest value of 0.4 ppm in the summer from July to August. After water quality management, the NO2- gradually decreased. The salinity change was followed by rainfall during the summer rainy season, which gradually reduced the salinity from 32 psu to 17 psu. During this period, the salinity of the pool water in the experimental group was higher than that in the control group.