辽宁地区凡纳滨对虾大棚双茬养殖技术的实践与探讨OA

Liaoning is a major region for earthen pond culture of the Pacific white shrimp(Litopenaeus vannamei)in northern China.However,the traditional single-cropping model faces challenges such as concentrated harvest peri-ods,high market risks,and low farming efficiency.To overcome these bottlenecks,since 2016,the project team has systematically developed and promoted a double-cropping,off-season greenhouse cultivation technology for L.vannamei,leveraging the thermal insulation properties of plastic greenhouses.Based on a review of relevant research findings and production practices,this paper systematically elaborates on key aspects of this technology,including environmental control,facility configuration,seedling stocking,feed management,water quality regula-tion,routine management,disease prevention and control,and harvesting.It focuses on analyzing the yield increase mechanism and economic benefits of the double-cropping model,and discusses directions for optimization.Practice has shown that this technology can effectively extend the farming cycle,enable staggered harvesting to opti-mize market timing,and increase output per unit water volume,providing a replicable technical pathway for facility-based shrimp farming in northern regions.