湖北省"一稻两虾"新模式种养要点与效益分析OA

In response to issues in conventional rice-crayfish co-culture systems,such as the susceptibility of the second batch of cray-fish to high temperatures and diseases,as well as low aquaculture yields,a new comprehensive rice-crayfish co-culture model"cray-fish(Procambarus clarkii)+rice(Oryza sativa L.)+Macrobrachium rosenbergii"(one rice crop and two shrimp species)was intro-duced.Compared with the conventional rice-crayfish co-culture model,this model replaced crayfish with Macrobrachium rosenbergii in the perimeter trenches during the high-temperature period from June to October.Without affecting rice yield,the utilization rate of the ring ditch in the paddy field increased by 21.1％,and the utilization rate of the accumulated temperature in the system increased by 53.7％.The yield of this model was 2 381.2 kg/hm2 for crayfish,877.5 kg/hm2 for Macrobrachium rosenbergii,and 8 250.2 kg/hm2 for high-quality rice.The total output value was 113 550 yuan/hm2,and the income was 55 650 yuan/hm2,which was 15 780 yuan/hm2 higher than that of conventional rice-crayfish co-cropping.It had great market potential and development prospects.