基于柯布-道格拉斯生产函数的中国罗非鱼池塘养殖经济效益及影响因素分析

为了分析罗非鱼养殖经济效益的影响因素，采用2014年广东、广西、海南、福建和云南等5省（自治区）12个县的300组调查数据，运用成本收益分析法对罗非鱼池塘单养、混养和综合经营模式的经济效益进行了统计分析，并通过柯布-道格拉斯生产函数模型，测算了不同的投入和产出因素对中国罗非鱼池塘养殖经济效益的影响程度。结果表明，罗非鱼综合经营模式的成本利润率最高，罗非鱼单养模式的成本利润率最低。罗非鱼养殖生产的饲料投入、罗非鱼劳动用工数和池塘养殖面积因素是影响罗非鱼养殖效益的最显著因素。提出进行健康生态养殖，提高罗非鱼产品质量、降低饲料系数，提高饲料利用率、成立产业化经营组织和发展电子商务等途径来提高中国罗非鱼池塘养殖的经济效益。

Economic Benefits and Its Influencing Factors of Tilapia Pond Culture in ChinaBased on Cobb-Douglas Production Function

In order to analyze the influencing factors on the economic benefit of tilapia culture, cost-benefits of tilapia pond monoculture, polyculture and integrated culture were calculated using survey data of 300 households from 12 counties in Guangdong, Guangxi, Hainan, Fujian and Yunnan Province in 2014. Based on Cobb-Douglas production function model, the various input and output factors affecting the economic benefit of tilapia pond culture were calculated. The results indicated that among the three culture modes, integrated culture had the highest economic benefit, while tilapia pond monoculture had the lowest economic benefit. Feed inputs, labor number and pond area were the most significant factors affecting the efficiency of tilapia pond culture. To improve the economic benefit of tilapia pond culture, the authors put forward the suggestions including developing the healthy ecological pond culture to improve the quality of tilapia products, reducing feed coefficient to improve efficiency of feed utilization, setting up industrial management organization and developing e-commerce to expand the market of tilapia products at home and abroad.