Acurácia, precisão e robustez de indicadores internos para predição da digestibilidade aparente total de matéria seca em equinos

Pombo, G.V.; Valle, Tiago Del; Bradi, R.A.; Bueno, Ives Cláudio da Silva

doi:10.1590/1678-4162-8441

Cited by 4 publications

(3 citation statements)

References 12 publications

(5 reference statements)

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“…Total fecal collection (TC) is used as a reference method in nutrient consumption and digestibility tests. However, the high cost, long evaluation period, need for continuous labor, need for large sample size, extended time to adapt to the diet, and strict control of feed intake and excretion make indigestible markers a feasible option for this purpose (POMBO et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Use of indigestible markers to estimate the apparent dry matter digestibility of diets containing a cocoa by-product

Figueiredo

Saliba

Barbosa

et al. 2019

SCA

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Fecal production and apparent dry matter digestibility (ADMD) were evaluated using external markers (chromium oxide; titanium dioxide; isolated, purified, and enriched lignin (LIPE®); and isolated, purified, and enriched lignin nanoparticles (NANOLIPE®) and internal markers (indigestible DM (IDM), indigestible neutral detergent fiber (INDF), and indigestible acid detergent fiber (IADF) in diets based on Tifton 85 bermuda grass (Cynodon sp.) hay containing different concentrations of a cocoa by-product. Sixteen crossbred (Holstein × Zebu) dairy heifers with a mean live weight of 363.00 ± 27.70 kg were evaluated and distributed in a completely randomized block design with a split-plot arrangement. The plots corresponded to the diets, which differed in the substitution of bermuda grass hay with different concentrations (0, 8, 16, and 24% of DM) of the cocoa by-product, whereas the splitplots represented the indigestible markers. Chromic oxide, LIPE®, NANOLIPE®, and INDF accurately estimated ADMD and fecal production whereas titanium dioxide, IDM, and IADF did not accurately estimate these parameters.

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Section: Introductionmentioning

confidence: 99%

Use of indigestible markers to estimate the apparent dry matter digestibility of diets containing a cocoa by-product

Figueiredo

Saliba

Barbosa

et al. 2019

SCA

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“…Total excreta collection method has been used as a reference for estimating the digestibility coefficients of nutrients in diets, and consists of strict control of the amount of food ingested and that eliminated via excreta by the animal (A. G. M. Silva et al, 2018). However, high cost, long evaluation period, need for continuous labor, need for large sample size, extended time to adapt to experimental diet, and strict control of feed intake and excretion make indigestible marker method a feasible option for this purpose (Pombo, Valle, Bradi, & Bueno, 2016). Digestibility indicators more reliably determine the initial and final period of excreta collection, obtaining more reliable results (Moss et al, 2017).…”

mentioning

confidence: 99%

Sources of acid insoluble ash as marker of corn digestibility in broilers

Silva

Barbosa

Carvalho

et al. 2022

Semina: Ciênc. Agrár.

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The objective was to evaluate three sources of acid insoluble ash (AIA) (celite, kaolin, and sand), as indicators, to determine the apparent metabolizable energy of corn on a natural matter (AME) basis, dry matter digestibility coefficient (DMDC), and crude protein digestibility coefficient (CPDC) using total and partial excreta collection methods. Two hundred and ten Ross broiler chicks of 18 to 27 days of age were used. Broilers were adapted to experimental the diet for four days, and excreta were collected for 5 days. A reference diet (RD) based on corn and soybean meal was prepared to meet the nutritional requirements of the birds. A test diet was prepared with 40% replacement of RD with corn. The formulated diets were: D1, 99% Reference diet + 1% celite; D2, 59.4% RD + 39.6 % corn + 1% celite; D3, 99% Reference diet + 1% kaolin; D4, 59.4% RD + 39.6 % corn + 1% kaolin; D5, 99% Reference diet + 1% sand; D6, 59.4% RD + 39.6 % corn + 1% sand. The treatments were distributed in a completely randomized design, with six diets and five replicates of seven birds each in a 2x3 factorial arrangement. There were significant interactions for all variables investigated. It was observed that the AME and DMDC values of corn were similar in the two methods of collection, and PDC values using kaolin and celite makers were similar. However, the AME and CPDC of corn using sand with partial collection method were underestimated by 17.70 and 15.53%, respectively compared to those with the total collection method. The AME values of corn with the collection methods using celite and, the DMDC using celite and sand were significantly different. It was observed that the DMDC using celite and sand provided significantly lower values (4.67 and 5.15%), respectively, and the AME using celite was 2.86% lower than that obtained by total collection. To determine the EMA, DMDC, and CPDC in broilers, it is more efficient to use celiteTM and kaolin as markers with partial collection of excreta. Sand should not be used with partial excreta collection method, because it provides lower values of AME and CPDC compared to with total excreta collection method.

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“…Esse novo valor é chamado de erro residual, que é definido como o erro restante no modelo de predição, excluindo-se o erro devido ao viés médio(BIBBY & TOUTENBURG, 1977). É também referido como o erro de predição, excluindo-se o viés Exemplos dos conceitos de acurácia e precisão para predição de nitrogênio uréico excretado no leite, em vacas leiteiras, e tambémRodrigues et al (2010), que compararam diferentes marcadores para predição da digestibilidade aparente da matéria seca, em ovinos ePombo et al, (2016), em equinos. O atual estudo trabalhou desta forma para que possíveis trabalhos futuros possam utilizar os resultados de viés médio, RQMEP e erro residual para fins de comparação.…”

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>b<Quantificação de lignina em >i<Brachiaria spp.>/i< medida por LDA, LBA e NIRS>/b<

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AGRADECIMENTOS ♥ A Jesus, Maria e todos os santos, por me regerem, me guardarem, me governarem e me iluminarem. ♥ A meus familiares, pela sabedoria, força, incentivo, carinho, educação e muita, mas muita paciência. Em especial a meus pais Martius e Maria Aparecida que sempre lutaram por mim incondicionalmente. ♥ À Universidade de São Paulo (USP) e ao Prof. Dr. Romualdo Shigueo Fukushima por ter me acolhido como orientada, pela infraestrutura e pela confiança em mim depositada. ♥ À Embrapa Pecuária Sudeste (CPPSE) pelas doações e condições de realizar este projeto. Em especial ao Gilberto de Souza, Cristina Picchi, Mariana Dias (empresa Büchi) e Andrea Barreto. ♥ Ao meu namorado Thiago Henrique da Silva, por ter me apoiado desde o começo até o fim deste projeto, sem medir esforços para me ajudar, com amor e compreensão. ♥ A todos os docentes do Departamento de Nutrição e Produção Animal (VNP), em especial ao professor Paulo Mazza Rodrigues, e também os da FZEA Valdo Herling, Lilian Pereira e Saulo da Luz e Silva por todos os ensinamentos. ♥ Aos professores Lilian Barreto Elston, Ed Hoffmann Madureira e Josefino Mendes Neto (Juju), por me ensinarem que os valores são a base da educação. ♥ Aos funcionários do VNP-FMVZ e da FZEA, em especial ao Pedro Pacheco, à Simi, à Renata, à Ana, à Alessandra, dona Lúcia, Dione, João Paulo, a todos os funcionários das bibliotecas, todas as faxineiras, os vigilantes e seguranças, por estarem sempre disponíveis, inúmeras vezes, para me ajudar. ♥ Aos professores da banca examinadora, pela disponibilidade e contribuição. ♥ E a todos aqueles que contribuíram direta ou indiretamente para realização deste trabalho, MEUS SINCEROS AGRADECIMENTOS. Eu não teria chegado até aqui sem cada um de vocês. ♥ O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Código de Financiamento 001. Tem que ter veneno!

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Acurácia, precisão e robustez de indicadores internos para predição da digestibilidade aparente total de matéria seca em equinos

Cited by 4 publications

References 12 publications

Use of indigestible markers to estimate the apparent dry matter digestibility of diets containing a cocoa by-product

Use of indigestible markers to estimate the apparent dry matter digestibility of diets containing a cocoa by-product

Sources of acid insoluble ash as marker of corn digestibility in broilers

>b<Quantificação de lignina em >i<Brachiaria spp.>/i< medida por LDA, LBA e NIRS>/b<

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