Validação do Método da Reflectância no Infravermelho Proximal para Análise de Silagem de Milho

Fontaneli, Roberto Serena; Dürr, João Walter; Scheffer-Basso, Simone Meredith; Haubert, Fabrício Adriano; Bortolini, Fernanda

doi:10.1590/s1516-35982002000300008

Cited by 14 publications

(9 citation statements)

References 6 publications

(2 reference statements)

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“…108 kg/ha. The average content of 0.16% P was similar to those found by Fontaneli et al (2002) in an evaluation of 246 samples of corn silage. As the mineral concentration in silage is important to meet the requirements of ruminants, the K contents observed are likely to be insufficient to meet the requirements of cows in lactation, while the Ca and P contents are insufficient to meet even the requirements of animals in the maintenance phase (NRC, 2001), requiring supplementation of these nutrients when the diet is mostly composed of corn silage.…”

Section: Resultssupporting

confidence: 84%

Corn plant arrangement and its effect on silage quality

et al. 2014

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-This experiment was carried out to evaluate the effects of the row spacing between corn plants on silage quality. Different spacing between corn rows (40, 60, and 80 cm) was used, but the population of plants was maintained around 65,000/ha in all treatments. Analysis of variance was carried out and means were compared by Tukey's test at 5% of probability. A reduction in row spacing provided better spatial distribution of plants, but did not alter morphological composition or dry matter production. The corn with most equidistant spatial distribution (lowest row spacing) showed an increase in lignin concentration, neutral detergent fiber, and total carbohydrates, and showed a decrease in total digestible nutrients when compared with 80 cm row spacing. However, the organic digestibility matter was not affected by the treatments. The content and quality of protein were higher for 80 cm row spacing compared with the other levels; also, protein content was reduced as the spacing between rows became smaller. The only mineral affected was calcium, which had the lowest value at higher levels of spacing. Although differences were detected for many variables, the most appropriate spacing between rows should also take into account economic and practical aspects when choosing the best plant arrangement.

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Section: Resultssupporting

confidence: 84%

Corn plant arrangement and its effect on silage quality

et al. 2014

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“…Among the maize silage hybrids (Table 3), differences (P < 0.05) between the analysis systems were observed in eight of the maize silage hybrids. However, the average ADF value determined by the automated system for this class agreed with the value determined by the reflectance spectrometry method of a nearinfrared spectroscopy (NIRS) (Fontaneli et al, 2002) as well as with the results of Berchielli et al (2001), Santos et al (2003), andFay et al (2005 and2009).…”

Section: Determination Of Adf Contentsupporting

confidence: 79%

Comparative efficacy of the conventional and automated methods for determining neutral and acid detergent fiber

et al. 2016

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Different methods are available to determine fiber content in feeds. However, information about the accuracy of this methods for neutral detergent fiber (NDF) and acid detergent fiber ADF contents estimation (obtained with the use of TNT-100 nylon filtering bags) is very limited related to the large number of ruminant feed analysis. The purpose of this study was to compare the efficacy of the automated and conventional Van Soest methods to determine NDF and ADF contents for bovine cattle and feed supplements. Four classes of samples (tropical forage, maize silage hybrid, concentrated supplements and bovine cattlecattle) were evaluated for NDF and ADF contents using conventional and automated methods. Analysis involved a hierarchical factorial scheme with an entirely randomized design executed with repetitions. It was concluded that the automated method procedure generated similar results when compared to the conventional method for the determination of NDF contents in tropical forage, bovine cattle and maize silage samples, although is not recommended for samples with a high starch content. This system was not efficient for ADF determination in the evaluated samples.

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“…Os maiores valores de coeficiente de correlação foram observados para os teores de PB das dietas e sobras (0,85 e 0,87, respectivamente). Alguns autores têm verificado que os modelos preditos pela técnica do NIRS para os teores de MM, FDN e FDA são insatisfatórios (Fontaneli et al, 2002;Shenk e Westerhaus, 1995;Pires e Pates, 1998). Em relação aos minerais, sabe-se que o método NIRS não se mostra apropriado para predição desse constituinte, por subestimar os valores.…”

Section: Resultsunclassified

Predições da espectroscopia no infravermelho próximo podem determinar a digestibilidade e o consumo alimentar de cordeiros confinados

Almeida

Delphino

Paschoaloto

et al. 2018

Arq. Bras. Med. Vet. Zootec.

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RESUMO O presente trabalho teve como objetivo validar a eficácia do método de espectroscopia de reflectância do infravermelho proximal (NIRS) em predizer o consumo e a digestibilidade da MS e nutrientes de dietas para cordeiros confinados, em comparação ao método convencional de laboratório. Amostras das dietas fornecidas, sobras e fezes de 40 cordeiros Santa Inês foram submetidas a ambos os métodos e analisadas quanto aos teores de MS, MM, FDN, FDA, PB e EE, para futuros cálculos do consumo e da digestibilidade. A maioria dos coeficientes de correlação do modelo ficou na faixa de 0,66 a 0,81, mostrando-se adequados para a predição quantitativa. Os maiores coeficientes foram observados para teores de PB das dietas (0,85) e sobras (0,87). Foram encontradas altas correlações entre os métodos na predição do consumo (média de 0,93) e digestibilidade (média de 0,90) das dietas. As correlações entre as variáveis obtidas pela predição do NIRS e pelo método convencional foram adequadas, demonstrando que, independentemente do método, os teores nutricionais das dietas, das sobras e das fezes podem ser utilizados para calcular o consumo e a digestibilidade da MS e dos nutrientes das dietas para cordeiros confinados, sendo recomendado o método NIRS pela precisão, pela rapidez e pelo baixo custo em relação ao método convencional. Palavras-chave: composição química, consumo, digestibilidade, NIRS, ovinos ABSTRACT This research was carried out to validate the effectiveness of the Near-IR spectroscopy method in predicting intake and digestibility of DM and nutrients of diets for feedlot lambs, in order to

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Validação do Método da Reflectância no Infravermelho Proximal para Análise de Silagem de Milho

Cited by 14 publications

References 6 publications

Corn plant arrangement and its effect on silage quality

Corn plant arrangement and its effect on silage quality

Comparative efficacy of the conventional and automated methods for determining neutral and acid detergent fiber

Predições da espectroscopia no infravermelho próximo podem determinar a digestibilidade e o consumo alimentar de cordeiros confinados

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