期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
高密度对虾养殖中后期水质问题和调控(续)
1
作者 邱德全 杨世平 《中国水产》 北大核心 2004年第6期83-84,共2页
关键词 对虾 高密度养殖 养殖中期 养殖后期 水质调控 微生物制剂
下载PDF
Research on China's Aquaculture Efficiency Evaluation and Influencing Factors with Undesirable Outputs 被引量:2
2
作者 JI Jianyue WANG Pingping 《Journal of Ocean University of China》 SCIE CAS 2015年第3期569-574,共6页
Taking the aquaculture area, the number of farming boats and that of aquaculturist as input variables, the aquaculture production as desirable output variable and polluted economic loss as undesirable output variable,... Taking the aquaculture area, the number of farming boats and that of aquaculturist as input variables, the aquaculture production as desirable output variable and polluted economic loss as undesirable output variable, this paper conducts SBM model to evaluate the aquaculture efficiency based on the data of 16 aquaculture-developed provinces in China from 2004 to 2011. The results show the efficiency in China has not changed much in recent years with the efficiency values mainly between 0.39 and 0.53, and the efficiency of marine-aquaculture-dominated provinces is generally higher than that of freshwater-aquaculture-dominated ones. To analyze the difference under the efficiency, the panel Tobit model is used with education level factor, training factor, technology extension factor, technical level factor, scale factor and species factor as the efficiency influencing factors. The results show that technology extension factor and technical level factor have significant positive influence. 展开更多
关键词 China's aquaculture industry efficiency evaluation influencing factors SBM model panel Tobit model
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部