Nutrients for Lactation, Working Maintenance, and Gain in Live Weight in American Dairy Cows
1938; Elsevier BV; Volume: 21; Issue: 9 Linguagem: Inglês
10.3168/jds.s0022-0302(38)93005-x
ISSN1529-9066
Autores Tópico(s)Reproductive Physiology in Livestock
ResumoThis note supplements a previous paper (1) concerned with the evaluation of the working maintenance exponent, c, in the equation, DN"= b W c, notation 1 as before.A different method of mathematical analysis is applied to the same experimental data, as follows. I~IETI-IOD OF ANALYSIS~ ALL DATADistinction is made, as before, according to sign of AW, that is, whether the cow gained (+ •W) or lost ( -AW) in live weight, on the average, during the experimental period.The records are arranged in increasing order by W, and divided into groups by successive 10's.Each group of records so formed is fitted with the equation, D N = a F C M + K + dAW .............
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