Mix L S
J Dairy Sci. 1987 Feb;70(2):487-97. doi: 10.3168/jds.S0022-0302(87)80031-0.
The United States dairy industry is projected to go through a major transition by the 2000 with some regions experiencing more change than others. Population growth plus medical discoveries favorable to certain dairy products combined with strengthened marketing programs could increase consumption of milk equivalent from the present 66.3 to 72.1 million metric tons by the yr 2000. Ongoing genetic, feeding, and management improvements could raise average milk production per cow from the 1984 level of 5,680 kg to 7,425 kg by 2000. If growth hormone biotechnology is adopted, average production per cow could reach 9,281 kg by the 21st century. This could reduce US dairy cow numbers 30% from the present 11.1 million to 7.8 million by the yr 2000. Likewise, the dairy industry and others could expect approximately 92,500 fewer commercial dairy farms, a decrease of 51%. This would mean 195,000 fewer employees and 3.6 to 4.1 million fewer crop hectares would be required. A transition of this magnitude will require indepth planning by legislators, policy makers, university teaching, research, and extension personnel, agribusiness, industry representatives, and dairy producers to cope with the necessary adjustments.
预计到2000年,美国乳制品行业将经历重大转型,一些地区的变化将比其他地区更为显著。人口增长、有利于某些乳制品的医学发现,再加上强化的营销计划,到2000年,牛奶当量的消费量可能会从目前的6630万吨增加到7210万吨。持续的遗传、饲养和管理方面的改进,有望使每头奶牛的平均产奶量从1984年的5680千克提高到2000年的7425千克。如果采用生长激素生物技术,到21世纪,每头奶牛的平均产奶量可能达到9281千克。这可能会使美国奶牛数量到2000年从目前的1110万头减少30%,降至780万头。同样,乳制品行业及其他相关行业预计商业奶牛场数量将减少约92500个,降幅达51%。这意味着员工数量将减少19.5万,所需作物种植面积将减少360万至410万公顷。如此规模的转型将需要立法者、政策制定者、大学教学、研究和推广人员、农业综合企业、行业代表以及乳制品生产商进行深入规划,以应对必要的调整。