蟹鲈箱塘联动生态混养模式研究
A Study on Ecological Culture Technology of Chinese Mitten Crab with Largemouth Bass in Net Cages

混养是一种根据养殖物种间互利共生和对营养物质多层次利用而设计维护生态平衡的养殖模式。本试验在河蟹池塘环沟内设置比例合适的立体养殖网箱，套养适宜密度的加州鲈。养殖试验结束后对主养与套养品种的养殖效果进行评估，并对养殖效益进行分析。养殖试验结果表明，经过7~8个月的养殖，加州鲈和河蟹平均体质量分别达350 g和187 g，亩产分别为170 kg和70 kg。养殖效益显示，本养殖试验亩产值超1.47万元，亩均生产成本0.85万元，亩均纯利润0.62万元，投资回报率为73.5%。综上，该混养模式充分利用了养殖水体空间，是实行池塘多品种混养、提高池塘产出率的一种有益探索，值得广大养殖户借鉴。
The polyculture model is a farming model designed to maintain ecological balance based on mutualistic symbiosis among cultured species and multi-level utilization of nutrients. In this experiment, net cages were set up in the ditch of the river crab pond to raise California bass with appropriate density. After the breeding trial is completed, the breeding effects of the main and set breeding varieties will be evaluated, and the breeding benefits will be analyzed. The results of the breeding test showed that after 7~8 months of breeding, the average body weight of California sea bass and river crab reached 350 g and 187 g respectively, and the yields per mu were 170 kg and 70 kg respectively. The results of the breeding benefit analysis show that the output value per mu of this breeding trial exceeds 14,700 yuan, the average production cost per mu is 8,500 yuan, the average net profit per mu is 6,200 yuan, and the return on investment is 73.5%. In summary, this polyculture model makes full use of the space of the breeding water body. It is a useful exploration to implement polyculture of multiple species in the pond and improve the output rate of the pond. It is worthy of reference by the majority of farmers.