| 摘要 |
[Objectives] To establish an integrated agro-aquaculture ecological farming model by combining in-pond cage fish farming, water circulation systems, and rice cultivation on bio-floating beds, and compared it with traditional pond farming. [Methods] The research was carried out in 3 test ponds and 3 control ponds. A 6 m×9 m×2.5 m cage was set every 667 m2 in the test pond, and water circulator and microporous oxygenation equipment were installed. Ecological floating beds were set on both sides of the pond. Common aeration equipment was used for control ponds. The same number and size of crucian carp, and the same number, proportion and size of silver carp and bighead carp were raised in both the test and control groups. Total nitrogen, ammonium nitrogen, total phosphorus and phosphate content was determined every 15 d, and growth indicators and feed conversion ratios of fish were measured at the end of the experiment. [Conclusions] The content of total nitrogen, ammonium nitrogen, total phosphorus and phosphate in the experimental group decreased by 50.69%, 69.12%, 62.62% and 54.20%, respectively, compared with the control group. Compared with the control group, the harvest size, survival rate and yield per unit area of crucian carp in the experimental group increased by 5.25%, 7.58% and 13.28%, respectively, and the feed conversion ratio decreased by 4.72%. [Results] The integrated agro-aquaculture model demonstrated significant advantages in mitigating eutrophication, improving yield, and enhancing feed efficiency. |
