Desempenho de bezerros alimentados usando de sucedâneo até 56 dias de idade

Abstract

Performance of calves fed milk replacer until 56 days of ageThirty male Holstein calves were designed to two groups, kept in pasture since they were five days, and they were fed with commercial pelleted starter concentrate, and whole milk (control group) or milk replacer made with soy protein, wheat milk and whey (treatment group), in one hour a day, until 56 days. The calves had access ad libitum to water and mineral salt. Everyone was weighted weekly, and measured. The stature development didn't differ between treatments, but the weight gains were minor for the calves fed with milk replacer, what reflected on their body scores. The body weight gain was affected by the consume of concentrate, and by the dry matter of the liquid diet, because of the decantation of this product occurred during the supply.

Increase in Crude Protein Content of Milk Replacers with Vegetable Protein: Effect on Health and Dairy Calves' Performance

“…França et al (2011) reported similar results related to body weight, with no differences between treatments and no interaction between treatment and age. The weight loss during the first weeks of age was expected due to high incidence of diarrhea observed during this period because of animals immunity fall.…”

Efeito da dieta liquida no desempenho e custo de produção de bezerros leiteiros na fase de cria

“…Mesmo com variação numérica nos valores das pesquisas, fica claro que os animais que recebem leite integral em sua dieta líquida na fase de cria têm o desempenho melhorado. Fato este também observado na literatura, cujas pesquisas relatam que o desempenho dos bezerros que recebem sucedâneo é em média de 20% a 30% inferior aos animais tratados somente com leite integral (França et al, 2011;Boito et al, 2015).…”

“…Boito et al 2015atribuíram esse efeito ao valor biológico do sucedâneo, que é menor que o do leite integral e apresenta uma menor taxa de absorção dos nutrientes quando comparados ao leite integral. Além de atributos nutricionais influenciarem no ganho de peso dos animais, outro fator determinante diz respeito às características organolépticas dos substitutos lácteos, o que dificulta a adaptação dos animais a essa dieta (França et al, 2011;Schäff et al, 2018).…”

“…Os substitutos do leite são formulados com finalidade de estimular uma maior ingestão de concentrado (Bartlett et al, 2005). França et al (2011) observaram maior ingestão de concentrado em animais que receberam sucedâneo em relação aos animais que receberam leite em sua dieta.…”

Effects of methionine plus cysteine inclusion on performance and body composition of liquid-fed crossbred calves fed a commercial milk replacer and no starter feed

“…The high inclusion observed is a consequence of the non-milk protein source included in MR. Soybean and wheat are the most used ingredients as non-milk protein source in MR, and besides the premise that soy proteins are less digestible than milk proteins, because of the immature digestive tract of young calves (Tanan, 2005), soy proteins may contain anti-nutritional factors, such as trypsin inhibitor, antigenic proteins (glycinin and β-conglycinin), and indigestible sugar (verbascose and oligosaccharides; Huisman and Jansman, 1989), and those issues may be associated with digestive disruptions (França et al, 2011;Morrison, 2015) and the lower small intestine development in calves (Drackley et al, 2006). Even with industrial treatments of vegetable protein sources, soy and wheat protein inclusion in MR may be linked to calves' low performance.…”