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EnglishTo study the effect of post-weaning feeding levels on the growth of dairy heifers, 40 animals with 77.7 ± 8.1 days of age and 77.5 ± 9.2kg of body weight were grouped in 10 pens, and each pen was randomly assigned to one of the following treatments for 120 days: feeding level to achieve a body weight gain of 600 (TMEDIUM) or 800 (THIGH) g/day based on a total mixed ration. After this period all heifers were managed as a single group for 150 days. Nutrient intake, behavior, body weight and other morphological measures were recorded in each animal. As a result of the experimental design THIGH heifers had a higher nutrient intake than TMEDIUM heifers, which was reflected in a higher daily weight gain, withers height, heart girth and hip width. However, treatments had no effect on these traits during the residual period. Key words: heifer; feeding level; growth portuguesPara estudar o efeito dos niveis de alimentacao pos-desmame sobre o crescimento de novilhas da raca Holandes, 40 animais com 77,7 ± 8,1 dias de idade e 77,5 ± 9,2kg de peso corporal foram agrupados em 10 canetas, sendo que cada caneta foi aleatoriamente designada para um dos seguintes tratamentos por 120 dias: nivel de alimentacao para atingir um ganho de peso corporal de 600 (TMEDIO) ou 800 (TALTO) g/dia com base em uma racao total misturada. Apos este periodo, todas as novilhas foram tratadas como um unico grupo por 150 dias. A ingestao de nutrientes, o comportamento animal, o peso corporal e outras medidas morfologicas foram registrados em cada animal. Como resultado do delineamento experimental, as novilhas TALTO tiveram maior ingestao de nutrientes do que as novilhas TMEDIO, o que refletiu em maior ganho diario de peso corporal, altura dos gomos, circunferencia do coracao e largura do quadril. No entanto, os tratamentos nao tiveram efeito sobre estas variaveis durante o periodo residual. Palavras-chave: novilha; nivel de alimentacao; crescimento

Post-weaning feeding levels on feeding behavior, growth and development in Holstein dairy heifers