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.
Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows
This experiment aimed at validating the relationship between digestible amino acids with the digestible lysine proposed on the basis of the ideal protein concept. This experiment used 120 lactating sows distributed in a complete randomized block design with six treatments and 20 repetitions and one sow per experimental unity. The diets were formulated based on a reference diet – which contained 19.5% of crude protein (CP) and 0.95% of digestible lysine supplemented with digestible methionine, threonine, tryptophan and/or valine to meet the ideal protein based determined relationships with digestible lysine. The diets did not change weight loss and variation, thickness and thickness variation of backfat, protein and body protein variation, fat and body fat variation, neither they changed the weaning-estrus interval or milk production of the sows. The relationships between metionine + cistine, threonine, tryptophan, and valine digestible amino acids with digestible lysine based proposed on ideal protein meet the requirements of lactating sows for better reproductive and productive performances.
Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows
Haese,Douglas and Donzele,Juarez Lopes and Oliveira,Rita Flávia Miranda de and Kill,João Luís and Abreu,Márvio Lobão Teixeira de and Saraiva,Alysson and Silva,Francisco Carlos de Oliveira and Puppo,Débora Del. Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows. R. Bras. Zootec. [online]. 2010, vol.39, 7, [cited 2026-04-24], pp.1497-1502. Available from: <https://rbz.org.br/article/validation-of-the-relationships-of-methionine-threonine-tryptophan-and-valine-amino-acids-with-the-digestible-lysine-in-the-ideal-protein-in-feedings-for-lactating-sows/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982010000700015.
Haese,Douglas; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Kill,João Luís; Abreu,Márvio Lobão Teixeira de; Saraiva,Alysson; Silva,Francisco Carlos de Oliveira; Puppo,Débora Del. Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows. R. Bras. Zootec., v.39, 7, p. 1497-1502. Jul. 2010. Available from: <https://rbz.org.br/article/validation-of-the-relationships-of-methionine-threonine-tryptophan-and-valine-amino-acids-with-the-digestible-lysine-in-the-ideal-protein-in-feedings-for-lactating-sows/>. acess on 24 Apr. 2026. https://doi.org/10.1590/S1516-35982010000700015.
Haese,Douglas, & Donzele,Juarez Lopes, & Oliveira,Rita Flávia Miranda de, & Kill,João Luís, & Abreu,Márvio Lobão Teixeira de, & Saraiva,Alysson, & Silva,Francisco Carlos de Oliveira, & Puppo,Débora Del. (2010). Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows. R. Bras. Zootec., 39(7) , 1497-1502. https://doi.org/10.1590/S1516-35982010000700015.
HaeseDouglas, DonzeleJuarez Lopes, OliveiraRita Flávia Miranda de, KillJoão Luís, AbreuMárvio Lobão Teixeira de, SaraivaAlysson, SilvaFrancisco Carlos de Oliveira, PuppoDébora Del. Validation of the relationships of methionine, threonine, tryptophan and valine amino acids with the digestible lysine in the ideal protein in feedings for lactating sows. R. Bras. Zootec. [Internet]. 2010 Jul [cited 2026 Apr 24]; 39(7): 1497-1502. Available from: https://rbz.org.br/article/validation-of-the-relationships-of-methionine-threonine-tryptophan-and-valine-amino-acids-with-the-digestible-lysine-in-the-ideal-protein-in-feedings-for-lactating-sows/. https://doi.org/10.1590/S1516-35982010000700015.
Figure 6
Differential abundance for the species Faecalibacterium prausnitzii (A) and Megamonas funiformis (B).
