乳制品进口对中国不同规模奶牛养殖效率的影响
魏艳骄,朱晶

Effects of dairy imports on the efficiency of cow farming operations of different scales in China
Yanjiao WEI,Jing ZHU
图2 2002—2015年中国奶牛养殖规模结构
Figure 2 Scale structure of China’s cow farming, 2002-2015