Effect of anionic diet on stability and milk composition of dairy cows

• Grant number: 13/02227-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2013
• End date: March 31, 2014
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Marcos Veiga dos Santos
• Grantee: Maria Libera Tietz Cavalcanti
• Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The hypothesis of this study is that the reduction of the cation-anion balance of the diet of lactating cows alters milk stability. The objective of the study is to evaluate the effect of cation-anion balance of the diet for dairy cows on production, milk composition, and stability. Will be used 16 Holstein cows in the middle stage of lactation (> 100 <200 days) with an average production of 25 kg/day, and average body weight of 600 kg, distributed in 4 contemporary Latin squares 4 x 4, with 4 periods of 21 days and 4 treatments. Cows will be housed in the stable type "free-stall", fed twice daily with individual control of food intake and regime two milkings. To reduce the cation-anion balance of the diet, cows receive increasing levels of ammonium sulfate per treatment. Will be used four experimental diets with forage base of corn silage: 1) +275 mEq / kg DM, 2) +175 mEq / kg DM, 3) 75 mEq / kg DM; -75 mEq / kg DM. The dependent variables to be evaluated are milk production, milk composition, stability, subunit casein concentration of ionized calcium in milk. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MARTINS, C. M. M. R.; ARCARI, M. A.; WELTER, K. C.; GONCALVES, J. L.; SANTOS, M. V.. Effect of dietary cation-anion difference on ruminal metabolism, total apparent digestibility, blood and renal acid-base regulation in lactating dairy cows. ANIMAL, v. 10, n. 1, p. 64-74, JAN 2016. (12/22165-9, 13/07041-4, 12/23212-0, 13/02227-2)

MARTINS, C. M. M. R.; ARCARI, M. A.; WELTER, K. C.; NETTO, A. S.; OLIVEIRA, C. A. F.; SANTOS, M. V.. Effect of dietary cation-anion difference on performance of lactating dairy cows and stability of milk proteins. JOURNAL OF DAIRY SCIENCE, v. 98, n. 4, p. 2650-2661, APR 2015. (12/22165-9, 13/07041-4, 12/23212-0, 13/02227-2)