Efeitos de fontes e formas de processamento do amido na utilização de nutrientes e parâmetros ruminais de vacas em lactação

Simas, J M C; Pires, Alexandre Vaz; Susin, Ivanete; Santos, Flávio Augusto Portela; Mendes, Clayton Quirino; Oliveira, Reinaldo Cunha de; Fernandes, Juliano José de Resende

doi:10.1590/s0102-09352008000500014

Cited by 11 publications

(9 citation statements)

References 13 publications

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“…Studies indicated that processing could affect starch degradability (Ørskov, 1986;Simas et al, 2008), but our study found that processing on energy concentrated ingredients did not affect the DM and PB degradability. However, other factors also could affect the degradability of the feeds as cultivar (Rossi et al, 2016), feed origin like coproduct or others (Busanello et al, 2016a;Lee et al, 2016), soluble carbohydrate content (Poorkasegaran and Yansari, 2014), neutral detergent fibre (NDF) and acid detergent fibre (ADF) (Busanello et al, 2016b;Lee et al, 2016).…”

Section: Resultscontrasting

confidence: 76%

A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

et al. 2018

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One factor that may interfere with rumen fermentation is the physical form of feed, because of the colonization by bacteria during processing. Here, we aimed to perform a meta-analysis and evaluate the in situ ruminal degradability of energy feeds with distinct physical forms (grain vs. meal). We created a database, comprising 39 treatments from 12 studies conducted in Brazil, and focused on parameters for the potential and effective degradability of dry matter (DM) and crude protein (CP) of energy feeds. The results showed that there was no difference (P > 0.05) in any of the degradability parameters of DM and CP between the grain and meal. However, the readily soluble fraction of DM in the grain showed a higher degradability trend (P = 0.0888). Overall, it was concluded that the processing of energy feeds does not modify the degradability parameters of DM and CP, and that further studies need to be conducted in Brazil to evaluate the in situ ruminal degradability of starch.

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Section: Resultscontrasting

confidence: 76%

A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

et al. 2018

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“…Flint corn is the primary grain source used in finishing diets in Brazil, and most of the feedlots use cracking as the most common (57.6%) processing method (Oliveira and Millen, 2014). As a result, when compared to steam flaking, which is commonly used in U.S. feedlot diets, Brazilian diets are intrinsically less efficient when used by the animal (Simas et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake1

Pereira

Cruz²,

Arrigoni

et al. 2016

Journal of Animal Science

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The objective of this study was to examine the relationship of DMI fluctuation, feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics in Nellore cattle classified by residual feed intake (RFI). One experiment was conducted in 2 consecutive years using individual pens (1.0 × 7.0 m) at the São Paulo State University feedlot, Dracena campus, Brazil. The experiment in year 1 started in June of 2012 with forty-eight 20-mo-old Nellore yearling bulls with an initial BW of 358.2 ± 19.4 kg. The experiment in year 2 started in January of 2013 with sixty 20-mo-old Nellore yearling bulls with an initial BW of 402.5 ± 33.0 kg. Experiments in years 1 and 2 lasted 94 and 84 d, respectively. All yearling bulls were categorized as high RFI (>0.5 SD above the mean, = 25), medium RFI (±0.5 SD from the mean, = 56), and low RFI (<0.5 SD below the mean, = 27). Visual appraisal to collect behavior data was made on d 40 (finishing period) of both years. Yearling bulls were harvested when average across treatment groups achieved a fat thickness of 4 mm at the 12th rib. Low-RFI yearling bulls had lower daily DMI, expressed either in kilograms ( < 0.01) or as percentage of BW ( < 0.01), and improved G:F ( < 0.01) when compared to high-RFI animals. No differences were observed ( > 0.10) for ADG, final BW, or HCW among RFI groups. Also, low-RFI yearling bulls had thinner final 12th rib ( < 0.01) and biceps femoris (P8) fat thickness ( < 0.01). Low-RFI yearling bulls were slower to consume ( = 0.03) and ruminate ( < 0.01) 1 kg of either DM or NDF. No significant ( > 0.10) RFI effect was observed for any ruminal morphometrics variables evaluated, with the exception of papillae area, in which low-RFI Nellore yearling bulls tended to have smaller ( = 0.07) papillae area than medium-RFI animals. In general, low-RFI Nellore yearling bulls consumed more particles larger than 19 and 8 mm and had a similar performance when compared to both medium- and high-RFI bulls; however, carcass fat composition was negatively impacted.

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“…Segundo Simas et al (2008), o amido de milho grosseiramente moído apresenta menor digestibilidade no trato digestivo total, comparada ao milho finamente moído e milho floculado.…”

Section: Resultsunclassified

Utilização da raiz de mandioca desidratada, em substituição ao milho, na suplementação de vacas holandesas em pastejo sobre o consumo voluntário, digestibilidade aparente e metabolismo energético

et al. 2015

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ResumoO experimento foi realizado para avaliar o efeito da substituição do milho moído por raiz integral de mandioca moída e desidratada nos níveis 0%, 25%, 50%, 75% e 100% nos suplementos experimentais para vacas lactantes mantidas em pastagens tropicais irrigadas e adubadas. Foram utilizadas 10 vacas da raça Holandesa, divididas em dois quadrados latinos 5x5, com média inicial de 150 dias de lactação, produção leiteira inicial de lactação de 22 kg/dia e peso corporal inicial médio de 603 kg, mantidos em pastagem formada por capim elefante (Pennisetum purpureum, SCHUM) cultivar pioneiro, consorciado com capim Tifton 85 (Cynodon nlemfuensis), irrigadas e adubadas com 600 kg de nitrogênio por hectare/ ano. Não foram encontrados efeitos significativos de substituição do milho moído por raiz integral de mandioca moída e seca no concentrado (P>0,05), sobre o consumo voluntário da dieta total, com média estimada de 20,61 kg/MS/animal/dia, digestibilidade aparente da MS com média estimada de 59,60% e balanço de energia, com média estimada de +6,36 Mcal dia -1 . Os resultados deste estudo demonstram que a raiz de mandioca pode ser utilizada como fonte energética de alto valor nutricional, semelhante ao do milho, na suplementação de vacas lactantes mantidas em pastagens tropicais. Palavras-chave: Carboidratos, forrageiras, ingestão, nutrição AbstractThe development of this experiment intended to evaluate the effect of replacing ground corn for dried and ground cassava roots with the levels of 0%, 25%, 50%, 75% and 100% in the experimental supplements for lactating cows kept on tropical irrigated and fertilized pastures. Ten Holstein cows were divided into two 5x5 Latin squares, with an initial lactation average of 150 days, 22 kg/day of average milk production of lactation and approximate initial average body eight of 603 kg. The animals were kept in pasture constituted by elephant grass (Pennisetum purpureum, SCHUM) cv Pioneer, associated with Tifton 85 grass (Cynodon nlemfuensis), irrigated and fertilized with 600 kg of nitrogen per hectare/ year. No significant effects on the substitution of ground corn for dried and ground cassava roots in the concentrate (P>0.05) over the spontaneous consumption of the total diet, with estimated average of 20.61 kg/DM/animal/day, apparent digestibility of DM with estimated average of 59.60% and energy balance with estimated average of +6.36 Mcal day -1 . The results of this study demonstrate that the cassava root can be used as an energy source of high nutritional value for supplementation of lactating cows grazing on tropical pastures, similar to corn results.

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Efeitos de fontes e formas de processamento do amido na utilização de nutrientes e parâmetros ruminais de vacas em lactação

Cited by 11 publications

References 13 publications

A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

Relationships of feedlot performance, feeding behavior, rumen morphometrics, and carcass characteristics of Nellore cattle differing in phenotypic residual feed intake1

Utilização da raiz de mandioca desidratada, em substituição ao milho, na suplementação de vacas holandesas em pastejo sobre o consumo voluntário, digestibilidade aparente e metabolismo energético

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