Optimizing Profitability and Lifetime Productivity of Beef Replacement Heifers
作者: C.P. Bagley
刊名: Wyno Academic Journal of Agricultural sciences, 2015, Vol.3 (1)
来源数据库: Wyno Academic Journals
关键词: Beef CattleHeifersNutritionLifetime ProductivityPubertyProduction CostsReprod Genetics.
原始语种摘要: Beef production systems in the U.S. involve relatively intensive management that is based upon maximizing the productivity of individual animals, and getting beef to market-weights using cereal grains in feedlots where finished beef weighs approximately 600 kg at less than 24 months of age. Integral to this production system is generating replacement females into the mature herd which calve initially at a young age (24 months of age), rebreed, and produce a calf each year that is a relatively high percentage body weight of the dam so adequate carcass weights can be reached. While it is clear in feedlot cattle which animals are genetically superior due to weight, fat, and marbling characteristics, selection criteria based upon individual weaning weight, height, and body condition score for...
全文获取路径: PDF下载  Wyno Academic Journals 

  • weights 法码
  • production 生产
  • weaning 断奶
  • improved 改进
  • feedlot 饲养圈
  • ability 能力
  • increase 增加
  • level 水准
  • their 他们的
  • maximizing 最大化