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Accuracy of the estimates of ammonia concentration in rumen fluid using different analytical methods 45
Souza,N.K.P.; Detmann,E.; Valadares Filho,S.C.; Costa,V.A.C.; Pina,D.S.; Gomes,D.I.; Queiroz,A.C.; Mantovani,H.C..
The accuracy of two different methods in measuring the ammonia nitrogen (N-NH3) concentration in rumen fluid were evaluated: a catalyzed indophenol colorimetric reaction (CICR) and the Kjeldahl distillation (KD). Five buffered standard solutions containing volatile fatty acids, true protein, and known ammonia concentrations (0, 3, 6, 12, and 24 N-NH3 mg/dL) were used to simulate rumen fluid. Different ratios (10:1, 7.5:1, 5:1, 2.5:1, 1:1, 1:2.5, 1:5, 1:7.5, and 1:10) of a potassium hydroxide solution (KOH, 2 mol/L) to standard solutions were evaluated by the KD method. The accuracy of each method was evaluated by adjusting a simple linear regression model of the estimated N-NH3 concentrations on the N-NH3 concentrations in the standard solutions. When the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia nitrogen; Indophenol colorimetric reaction; Kjeldahl distillation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000600024
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Agronomic performance of Marandu grass treated with plant growth biostimulants in the Amazon biome 45
Oliveira,W.F.; Lima,E.M.; Gomes,D.I.; Alves,K.S.; Santos,P.M.; Azevedo,G.S.; Mezzomo,R..
ABSTRACT The aim was to evaluate the effect of different doses of two biostimulants on the productivity and canopy structure of Urochloa brizantha cv. Marandu grass in the establishment fase. The study was conducted in Universidade Federal Rural da Amazônia, Parauapebas, Pará, Brazil. One module of 35 plots of 25m² were established. A completely randomized experimental design was used, with seven treatments and five replicates. The treatments included a control, 0.5, 1, and 2kg/ha of biostimulant A (BIOST.A); and 0.25, 0.5, and 1L/ha of biostimulant B (BIOST.B). Three collections were performed. The data for application of the two biostimulants were analyzed separately, using the Dummy variable method and regression analysis. The application of 2kg/ha...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Auxin; Cytokinin; Gibberellin; Forage stimulation; Urochloa brizantha.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200603
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Avaliação laboratorial de compostos fibrosos em alimentos e fezes bovinas sob diferentes ambientes físicos 45
Gomes,D.I.; Detmann,E.; Valente,T.N.P.; Valadares Filho,S.C.; Queiroz,A.C..
Tipo: Info:eu-repo/semantics/article
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000200038
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Performance and digestibility of confined lambs fed with Babassu cake (Orbignya speciosa) as a substitute for elephant grass silage 45
Luz,J.B.; Gomes,D.I.; Neta,E.R. Santos; Mezzomo,R.; Oliveira,L.R.S.; Silva,R.C.; Reis,G.C.; Alves,K.S..
ABSTRACT The objective of this study was to evaluate the effect of the partial replacement of elephant grass silage with babassu (Orbignya speciosa) on the performance, intake, digestibility, and carcass weight gain of sheep. Fifty-four castrated male lambs (19.08±2.76kg) were distributed in a completely randomized design and administered one of the following treatments: 0.0, 12.5, 25.0, 37.5 or 50% dry matter (%DM) replacement of elephant grass silage with babassu cake. No difference (P> 0.05) was observed in the dry matter, crude protein, and neutral detergent fiber intake, but the ether extract intake increased (P< 0.05). The digestibility of the dry matter, neutral detergent fiber, and total digestible nutrients were unaffected. The crude protein...
Tipo: Info:eu-repo/semantics/article Palavras-chave: By-product; Intake; Feedlot; Ruminants.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300977
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