Schaal T, Cherian G
Department of Animal Sciences, Oregon State University, Corvallis, Oregon 97331-6702, USA.
Poult Sci. 2007 Mar;86(3):598-600. doi: 10.1093/ps/86.3.598.
A survey was conducted of the hatchability of broiler and turkey eggs set in US commercial hatcheries from 1985 through 2005. In 2005, a total of 11 billion broiler eggs and 343 million turkey eggs were set, compared with 5.6 billion broiler eggs and 258 million turkey eggs set in 1985. These numbers represented increases of 98 and 33% in the respective totals of broiler and turkey eggs set since 1985. Hatchability during this period ranged from 79 to 82% for broiler eggs and 76 to 80% for turkey eggs. Advances in nutrition, genetic selection, and management of broiler and turkey flocks during this time period did not result in an increase in hatchability. The economic loss associated with the lack of improved hatchability in the year 2005 was in excess of $500 million.
对1985年至2005年期间美国商业孵化场孵化的肉鸡和火鸡种蛋的孵化率进行了一项调查。2005年,共孵化了110亿枚肉鸡种蛋和3.43亿枚火鸡种蛋,而1985年分别为56亿枚肉鸡种蛋和2.58亿枚火鸡种蛋。这些数字表明,自1985年以来,肉鸡和火鸡种蛋的总数分别增长了98%和33%。在此期间,肉鸡种蛋的孵化率在79%至82%之间,火鸡种蛋的孵化率在76%至80%之间。在此期间,肉鸡和火鸡群在营养、遗传选择和管理方面的进步并未导致孵化率的提高。2005年因孵化率未提高而造成的经济损失超过5亿美元。