000			02635nab a2200337 i 4500
003			BR-BrBNA
005			20250417184450.0
008			250417b2020 bl.ar|nooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aU10
072			_aL51
100			_aOliveira, Jhone Gleison de
100			_aHenrique, Douglas Sampaio
100			_aAbreu, Matheus Lima Corrêa
100			_aFluck, Ana Carolina
100			_aMayer, Lilian Regina Rothe
100			_aCosta, Olmar Antônio Denardin
100			_aAtoji-Henrique, Katia
245			_aEvaluation of mathematical models to describe gas production kinetics of some tropical and temperate forages
500			_aPublicação on-line; 35 ref.; 1 illus; 4 tables; Sumaries (En)
520			_a ABSTRACT - Our objective was to identify the best fit mathematical models for in vitro gas production kinetics using rumen fluid and forage plants commonly used in ruminant feed to obtain better estimates of parameters that describe the rumen fermentation. Four mathematical models were tested, two unicompartmental (M1 = first order, M2 = Gompertz) and two bicompartmental (M3 = M1 + M2; M4 = M2 + M2). Two temperate grasses were evaluated, as well as four tropical grasses and three temperate forage legumes. The fit of the models was verified by the corrected Akaike information criterion (AICcr ) and the difference among AICcr values (Δr ), likelihood probability (Wr ), and relative likelihood (ERr ). Temperate forages reached maximum gas production between 48 and 72 h. In the tropical forages, it occurred only after 72 h. In profiles in which M3 was the best choice, the values of parameters Vf 1 were higher than those of Vf 2 , and k1 values were higher than k2 values. The only exception was for Tifton 85 profile, whose Vf 2 value was higher than Vf 1 . The model M3 has a better fit for tropical forages with higher fiber content and lower levels of nonfibrous carbohydrates and crude protein. The model M1 has a better fit for forage with higher nonfibrous carbohydrate contents and low lignin content. Keywords: in vitro, kinetic parameters, ruminal kinetics
650			_aRUMINANTE
650			_aPLANTA FORRAGEIRA
650			_aFERMENTAÇÃO
650			_aCOMPOSIÇÃO QUÍMICA
650			_aMODELO MATEMÁTICO
773	0		_03545 _9317600 _dViçosa-MG Sociedade Brasileira de Zootecnia 1997 _o2024-4310 _tRevista Brasileira de Zootecnia (Brazil) _x1516-3598 _gv. 49 p. 1-10; (2020) _wBR2025000609
856			_uhttps://www.scielo.br/j/rbz/a/VDSn8p3cmv6T8HDX9nMkZss/?format=pdf&lang=en
942			_cANA
999			_c331107 _d331107