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Abstract by jay Mattison - Characteristics of
the USA dairy herd as related to management and
demographic elements
The data
characteristics of the United States dairy herd
related to animals enrolled in milk recording
(dairy herd improvement) are the basic
foundation and important influencers for the
management and genetic progress achieved in a
population or animal production unit. The
amount, characteristics and demographics of the
data on file at the USDA-AIPL database and DHI
programs were determined for the latest year of
2011 and then the last five years 2007-2011. For
2011 there were over 4.4 million cows enrolled
in the milk recording programs that submitted
data to AIPL as part of the routine programs. It
is estimated that another 1.2 million animals
were enrolled in milk recording plans that were
for management only with data returned directly
from the local or regional milk recording field
service organization to the dairy farm. In 2011,
the 4.4 million cows submitted to the AIPL
database provided over 46 million test days with
an average of 52 data variables each test day
for research, genetic evaluations and management
purposes. These data provided animal genetic
evaluations (female and male) and key benchmarks
for both management and genetic use by the US
dairy industry. The trends for genetic progress
and time sensitive traits such as somatic cell
counts and Productive Life index demonstrate the
progress and direction that can be achieved with
economic or social signals that are presented to
the US dairy production system.
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