丘岗农区观山村渔业生产结构优化及生态效益分析

丘岗农区渔业生产结构优化的核心是调整鱼类混养的种类结构,使其充分利用当地饲料资源提高鱼产量。 观山村鱼业生产结构优化后,草食性鱼类放养比例由3.4％增大到40％。青饲料资源渔业利用率由0.8％上升到5.33％。在全村农业生产结构总体优化模型约束下,青饲料资源总量的9.93％可用于渔业。形成了以牧促农;以农养牧;农、牧养渔;渔促农、牧;农、牧、渔协调发展的良性生态循环格局。

THE OPTIMUM STRUCTURE OF FISHERY PRODUCTION AND ANALYSIS OF ITS ECOLOGICAL BENEFIT AT GUAN SHAN VILLAGE IN HILLY AGRICULTURE AREA, TAOYU AN, HUNAN PROVINCE

The main problem of realizing the optimum structure of fishery production in hilly agriculture area is to adjust the composition of fish species to be stocked and the fully use of the forage resources to improve the productivity of fishes.In Guan Shan Village, after this optimum structure of fishery is adopted the proportion of phytophagous fish in pond has risen from 3.4% to 40%, the. utilization rate of vegetable stuff from 0.8% up to 5.33%. Under the restriction of the overall optimum model of agriculture at the village, there are 9.93% of whole forage resources which can be used in fishery production. Therefore, a favourable ecological circulating pattern was formed, in which agriculture, animal husbandry and fishery production will be benefited by each other and a harmonious development will be maintained.