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.
ABSTRACT – This experiment was carried out todetermine the endogenous fecal losses of P and the effect of phytase on the biological availability of P in the diets and in the whole rice meal (WRM) for growing swines, by means of the isotopic dilution technique. The barrows were allotted to a complete randomized experimental design, with four treatments and three replicates. The treatments consisted on two diets without WRM (with or without 1250 FTU [Unit of Phytase Activity]/kg diet), with 0.34% total P, and other two diets with WRM (with or without 1250 FTU/kg of diet), with 0.56% total P. An the 11th day, each animal was intravenously injected with 7.4 MBq 32P. The endogenous fecal losses of P were not affected by the action of phytase. The phytase addition reduced the total P excreted in the feces and improved the absorption and the biological availability of P of diets with whole rice meal.
Effect of phytase on the biological availability of phosphorus by means of isotopic dilution technique, in whole rice meal based diets, for swines
Figueirêdo,Agustinho Valente de and Fialho,Elias Tadeu and Vitti,Dorinha Miriam S.S. and Lopes,João Batista and Filho,José Cleto da Silva and Teixeira,Antonio Soares and Lima,José Augusto de Freitas. Effect of phytase on the biological availability of phosphorus by means of isotopic dilution technique, in whole rice meal based diets, for swines. R. Bras. Zootec. [online]. 2000, vol.29, 1, [cited 2026-03-07], pp.177-182. Available from: <https://rbz.org.br/article/effect-of-phytase-on-the-biological-availability-of-phosphorus-by-means-of-isotopic-dilution-technique-in-whole-rice-meal-based-diets-for-swines/>. ISSN 1516-3598. https://doi.org/10.1590/S1516-35982000000100024.
Figueirêdo,Agustinho Valente de; Fialho,Elias Tadeu; Vitti,Dorinha Miriam S.S.; Lopes,João Batista; Filho,José Cleto da Silva; Teixeira,Antonio Soares; Lima,José Augusto de Freitas. Effect of phytase on the biological availability of phosphorus by means of isotopic dilution technique, in whole rice meal based diets, for swines. R. Bras. Zootec., v.29, 1, p. 177-182. Feb. 2000. Available from: <https://rbz.org.br/article/effect-of-phytase-on-the-biological-availability-of-phosphorus-by-means-of-isotopic-dilution-technique-in-whole-rice-meal-based-diets-for-swines/>. acess on 07 Mar. 2026. https://doi.org/10.1590/S1516-35982000000100024.
Figueirêdo,Agustinho Valente de, & Fialho,Elias Tadeu, & Vitti,Dorinha Miriam S.S., & Lopes,João Batista, & Filho,José Cleto da Silva, & Teixeira,Antonio Soares, & Lima,José Augusto de Freitas. (2000). Effect of phytase on the biological availability of phosphorus by means of isotopic dilution technique, in whole rice meal based diets, for swines. R. Bras. Zootec., 29(1) , 177-182. https://doi.org/10.1590/S1516-35982000000100024.
FigueirêdoAgustinho Valente de, FialhoElias Tadeu, VittiDorinha Miriam S.S., LopesJoão Batista, FilhoJosé Cleto da Silva, TeixeiraAntonio Soares, LimaJosé Augusto de Freitas. Effect of phytase on the biological availability of phosphorus by means of isotopic dilution technique, in whole rice meal based diets, for swines. R. Bras. Zootec. [Internet]. 2000 Feb [cited 2026 Mar 07]; 29(1): 177-182. Available from: https://rbz.org.br/article/effect-of-phytase-on-the-biological-availability-of-phosphorus-by-means-of-isotopic-dilution-technique-in-whole-rice-meal-based-diets-for-swines/. https://doi.org/10.1590/S1516-35982000000100024.
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).
