从改革开放和“菜篮子”工程实施以来,养殖业规模及产值均发生了巨大的变化,许多城郊建立了大中型集约化养殖场,畜禽数量飞速递增。近几年来,我国的肉、蛋总量连续保 Since the implementation of the reform and opening up and the “vegetable basket” project, the scale and output value of aquaculture have undergone tremendous changes. Many large and medium-sized intensive farms have been established in the suburbs and the number of livestock and poultry is rapidly increasing. In recent years, the total amount of meat and eggs in our country has been continuously renewed