Effects of exogenous amylase on the in vitro digestion kinetics of whole-crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition.

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dc.contributorABIAS SANTOS SILVA, UNIVERSIDADE ESTADUAL PAULISTA JÚLIO DE MESQUITA FILHO; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; MÁRCIO DOS SANTOS PEDREIRA, UNIVERSIDADE ESTADUAL DO SUDOESTE DA BAHIA; FERNANDA SAMARINI MACHADO, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL; CRISTINA SIMÕES CORTINHAS, DSM NUTRITIONAL PRODUCTS; TIAGO SABELLA ACEDO, DSM NUTRITIONAL PRODUCTS; RAFAEL DANTAS DOS SANTOS, CPATSA; JOÃO PAULO PACHECO RODRIGUES, UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARÁ; ROGÉRIO MARTINS MAURÍCIO, UNIVERSIDADE FEDERAL DE SÃO JOÃO DEL REI; THIERRY RIBEIRO TOMICH, CNPGL.
dc.creatorSILVA, A. S.
dc.creatorPEREIRA, L. G. R.
dc.creatorPEDREIRA, M. dos S.
dc.creatorMACHADO, F. S.
dc.creatorCAMPOS, M. M.
dc.creatorCORTINHAS C. S.
dc.creatorACEDO, T. S.
dc.creatorSANTOS, R. D. dos
dc.creatorRODRIGUES, J. P. P.
dc.creatorMAURICIO, R. M.
dc.creatorTOMICH, T. R.
dc.date2024-10-10T13:53:28Z
dc.date2024-10-10T13:53:28Z
dc.date2020-01-22
dc.date2020
dc.date.accessioned2026-07-07T05:59:47Z
dc.descriptionThe effect of exogenous amylase on the in vitro rumen digestion kinetics of wholecrop maize silage made from dent (RB9004) or flint grain type (RB9308) was evaluated at different phenological stages: soft dough (SOD), early dent (EAD), ½ milkline (½M) and ¾ milkline (¾M). Forage was harvested from 70 to 110 days after sowing. Two rumen-cannulated cows receiving or not exogenous amylase (0.7 g/kg dry matter-DM, provided to achieve 396 kilo Novo units of amylase activity/kg of TMR DM) were used as donor of ruminal fluid. The in vitro gas production kinetics was evaluated according to a dual?pool logistic model. The chemical composition and gas production kinetics were affected by the hybrid and phenological stages. The flint hybrid had lower range for chemical analysis among physiological stages. Harvesting at ½M and ¾M improved DM content, bromatological composition and silage quality parameters compared to dent or flint types. Amylase (i) increased methane (CH4) production and in vitro dry matter digestibility (IVDMD) in ½M stage, (ii) improved digestion kinetics by reducing lag time and increasing total gas production and fermentation rates of non?fibrous carbohydrates (NFC) and fibrous carbohydrates (FC), and (iii) increased extent and fermentation rate of NFC and increased fermentation rate of FC fraction in whole?crop maize silages produced from dent or flint types in all phenological stages. Harvesting between ½M and ¾M is the best phenological stage to improve chemical composition and silage quality parameters. Exogenous amylase showed improvements on fibre digestion of silages at ½M and ¾M phenological stages in both grain types of corn.
dc.identifierJournal of Animal Physiology and Animal Nutrition, v. 104, n. 1, p. 76-87, 2020.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1119184
dc.identifier10.1111/jpn.13234
dc.identifier.urihttp://hdl.handle.net/123456789/504123
dc.languageeng
dc.rightsopenAccess
dc.subjectDigestão in vitro
dc.subjectCarboidratos
dc.subjectTempo de colheita
dc.subjectDigestibilidade
dc.subjectMilho
dc.subjectSilagem
dc.subjectEnzima
dc.subjectMetano
dc.subjectSilage
dc.subjectCorn silage
dc.subjectGrass silage
dc.titleEffects of exogenous amylase on the in vitro digestion kinetics of whole-crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition.
dc.typeArtigo de periódico

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