%0 Journal Article
%T Perfil metab¨®lico e desenvolvimento da glandula mam¨¢ria de novilhas leiteiras sob manejo para crescimento compensat¨®rio
%A Costa
%A Patr¨ªcia Barcellos
%A Queiroz
%A Augusto C¨¦sar de
%A Rodrigues
%A Marcelo Teixeira
%A Magalh£¿es
%A Andr¨¦ Luiz Rodrigues
%A Zorzi
%A Karina
%A Mello
%A Renius
%A Silva
%A M¨¢rcia Maria Candido da
%A Alves
%A Nadja Gomes
%J Revista Brasileira de Zootecnia
%D 2012
%I Sociedade Brasileira de Zootecnia
%R 10.1590/S1516-35982012000200019
%X the objective of this trial was to compare the effect of compensatory growth regime on the metabolic profile and mammary gland development of dairy heifers. twenty brown-swiss heifers averaging 200 kg of body weight and five months of age were used in a completely randomized design with a 2 ¡Á 2 factorial arrangement. the treatments were arranged in a factorial arrangement (2 ¡Á 2) and the animals were randomly allocated in each one of the combinations. the factor 1 consisted of the feeding regime (conventional and compensatory growth) and the factor 2, of the use or not of ionophore (200 mg of monensin/animal/day). the animals in the conventional regime received ad libitum feeding, while those in the compensatory growth regime were submitted to a nutritional management with two different periods: period of energy restriction (90 days) and realimentation period (60 days). heifers submitted to the compensatory growth regime showed larger concentration of plasma urea nitrogen and lower dna:rna ratio in the mammary gland. when period was analyzed, the levels of high density lipoprotein (hdl) increased in the realimentation period, while the urea n decreased. in addition to the alteration in the levels of urea n, the energy balance to which the heifers in compensatory growth were submitted increased the non-esterified fatty acids. blood glucose levels reduced in the animals in compensatory growth during the realimentation period. supplementation with ionophore results in lower concentration of non-esterified fatty acids during the realimentation period.
%K blood metabolites
%K cows
%K ionophore
%K realimentation
%K restriction.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-35982012000200019&lng=en&nrm=iso&tlng=en