The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The objective of this work was to study the effects of age at the beginning of forage supply (4 or 60 days) and weaning age (35 or 56 days) on the digestibility of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and gross energy (GE) and nitrogen balance, in the post weaning period, in Holstein and Holstein x Zebu crossbred bull calves. The animals were maintained in metabolism cages for feces and urine collection. A unique diet containing 33.0% of forage, 67.0% of concentrate and 16% of crude protein on DM basis was used. The previous treatment did not affect the apparent digestibility coefficients of DM, CP, NDF and GE, and nitrogen balance, when evaluated in the period from 72 to 78 days of age.
Influence of weaning age and the beginning of forage supply to calves on the nutrient digestibility and nitrogen balance, post weaning
Rocha,Evandro de Oliveira and Fontes,Carlos Augusto de Alencar and Paulino,Mário Fonseca and Pereira,José Carlos and Ladeira,Márcio Machado. Influence of weaning age and the beginning of forage supply to calves on the nutrient digestibility and nitrogen balance, post weaning. R. Bras. Zootec. [online]. 1999, vol.28, 1, [cited 2026-03-08], pp.143-147. Available from: <https://rbz.org.br/article/influence-of-weaning-age-and-the-beginning-of-forage-supply-to-calves-on-the-nutrient-digestibility-and-nitrogen-balance-post-weaning/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35981999000100022.
Rocha,Evandro de Oliveira; Fontes,Carlos Augusto de Alencar; Paulino,Mário Fonseca; Pereira,José Carlos; Ladeira,Márcio Machado. Influence of weaning age and the beginning of forage supply to calves on the nutrient digestibility and nitrogen balance, post weaning. R. Bras. Zootec., v.28, 1, p. 143-147. Feb. 1999. Available from: <https://rbz.org.br/article/influence-of-weaning-age-and-the-beginning-of-forage-supply-to-calves-on-the-nutrient-digestibility-and-nitrogen-balance-post-weaning/>. acess on 08 Mar. 2026. http://doi.org/10.1590/S1516-35981999000100022.
Rocha,Evandro de Oliveira, & Fontes,Carlos Augusto de Alencar, & Paulino,Mário Fonseca, & Pereira,José Carlos, & Ladeira,Márcio Machado. (1999). Influence of weaning age and the beginning of forage supply to calves on the nutrient digestibility and nitrogen balance, post weaning. R. Bras. Zootec., 28(1) , 143-147. http://doi.org/10.1590/S1516-35981999000100022.
RochaEvandro de Oliveira, FontesCarlos Augusto de Alencar, PaulinoMário Fonseca, PereiraJosé Carlos, LadeiraMárcio Machado. Influence of weaning age and the beginning of forage supply to calves on the nutrient digestibility and nitrogen balance, post weaning. R. Bras. Zootec. [Internet]. 1999 Feb [cited 2026 Mar 08]; 28(1): 143-147. Available from: https://rbz.org.br/article/influence-of-weaning-age-and-the-beginning-of-forage-supply-to-calves-on-the-nutrient-digestibility-and-nitrogen-balance-post-weaning/. http://doi.org/10.1590/S1516-35981999000100022.
Figure 3
Ruminal disappearance of ash-free neutral detergent fiber (aNDFom) at 30 h of in situ incubation in corn husks (fresh and ensiled) treated with calcium oxide (CaO) and a mixture of corn heavy steep water and sugarcane molasses (HM).
