Technical note: A comparison of methods to determine pH in silages

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorBernardes, T. F.-
Autor(es): dc.creatorGervásio, J. R. S.-
Autor(es): dc.creatorMorais, G. de-
Autor(es): dc.creatorCasagrande, D. R.-
Data de aceite: dc.date.accessioned2026-02-09T12:35:20Z-
Data de disponibilização: dc.date.available2026-02-09T12:35:20Z-
Data de envio: dc.date.issued2020-04-03-
Data de envio: dc.date.issued2020-04-03-
Data de envio: dc.date.issued2019-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br//handle/1/39743-
Fonte completa do material: dc.identifierhttps://www.journalofdairyscience.org/article/S0022-0302(19)30622-8/fulltext-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1164323-
Descrição: dc.descriptionThe techniques used to assess pH in silages vary greatly. The aim of this study was to evaluate the effects of water-to-sample ratio, extraction procedure, and standing time on pH determination. Silage samples (n = 20 for each silage) were chosen to represent diverse crops (corn, elephant grass, sugarcane, and forage peanut) to have a varied ensilability index and thus a wide range in final pH. Three water-to-sample ratios and 2 extraction procedures were used to measure pH at 0, 5, 10, 15, 30, 60, and 120 min of standing time. The ratios (undried silage to water) were 9:60, 25:100, and 30:270. The samples with the first 2 ratios were manually extracted, using a glass beaker and a glass stirring rod. The samples with the 30:270 ratio were extracted by using a stomacher blender for 4 min at 200 rpm. An electrode was used to perform pH readings. Dry matter (DM), water-soluble carbohydrates, and lactic acid concentrations were determined. The experimental design was completely randomized using a mixed repeated-measures model. Mean separation was performed using the Tukey test at P < 0.10 using the MIXED procedure of SAS (SAS Institute Inc., Cary, NC). The DM concentrations ranged from 24.5 to 40.2, 15.8 to 25.9, 26.9 to 30.6, and 17.8 to 21.4% for corn, elephant grass, sugarcane, and forage peanut silages, respectively. The lactic acid concentrations ranged from 2.9 to 10.1, 1.8 to 4.4, 0.7 to 11.4, and 0.3 to 1.4% of DM for corn, elephant grass, sugarcane, and forage peanut silages, respectively. The pH values measured by the 9:60 method were greater than other techniques at any standing times. The pH values from the 25:100 and 30:270 methods did not differ for elephant grass and forage peanut silages at any standing times. However, the 30:270 method had greater pH values for corn and sugarcane silages than the 25:100 technique at any standing times. The pH values measured by the 30:270 method did not vary for any of the silages according to standing time. Nevertheless, the pH values of the 25:100 method were greater from 0 to 10 min than for other standing times for all silages. Thus, for this method, there was pH stabilization from 15 min of standing time on. Overall, the 25:100 and 30:270 methods are recommended for assessment of silage pH. Fifteen minutes of standing time should be used for the 25:100 method but the pH reading can be performed immediately after mixing for the 30:270 technique.-
Idioma: dc.languageen-
Publicador: dc.publisherAmerican Dairy Science Association-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Dairy Science-
Palavras-chave: dc.subjectForage analysis-
Palavras-chave: dc.subjectpH determination-
Palavras-chave: dc.subjectSilage fermentation-
Palavras-chave: dc.subjectAnálise de forragem-
Palavras-chave: dc.subjectDeterminação do pH-
Palavras-chave: dc.subjectFermentação de silagem-
Título: dc.titleTechnical note: A comparison of methods to determine pH in silages-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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