Efeito da qualidade do milho no desempenho de frangos de corte

Stringhini, José Henrique; Mogyca, Nadja Susana; Andrade, María Auxiliadora; Orsine, Geisa Fleury; Café, Marcos Barcellos; Borges, Sebastião Aparecido

doi:10.1590/s1516-35982000000100026

Cited by 16 publications

(12 citation statements)

References 16 publications

(3 reference statements)

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“…Changes in the nutritional values of grains are related to the preferences of insects for the germ (Lopes et al, 1988). On the other hand, Stringhini et al (2000) evaluated the performance of 1-to 28-day-old broilers fed diets containing insect-damaged corn (0 to 40%) and did not find any significant differences in weight gain, feed conversion, or liver, pancreas, and bursa weights relative to body weight. …”

Section: Resultsmentioning

confidence: 97%

Utilization of Different Corn Fractions by Broilers

Costa

Stringhini

Ribeiro

et al. 2015

Rev. Bras. Cienc. Avic.

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KeywordsCorn quality, corn density, metabolizable energy, broilers.Submitted: March/2014 Approved: November/2014 ABStRACt This study was conducted to evaluate the nutritional values of fractions of damaged corn. One hundred and eighty 22-d-old Cobb 500 male broilers were distributed in batteries according to a completely randomized design with six treatments of six replicates each. The treatments consisted of diets containing five corn fractions, classified as sound, fermented, insect-damaged, mold-damaged, or reference corn. The test diets consisted of 60% of reference diet + 40% of each corn fraction. Only the reference corn fraction included all the fractions at different proportions (0.8% fermented, 0.05% insectdamaged, 3.3% mold-damaged, and 95.85% sound grains). The method of total excreta collection was used to determine AMEn values and metabolizability coefficients of dry matter (MDM), crude protein (MCP), ether extract (MEE), and gross energy (MGE) of the reference corn and its fractions. The density values of the corn fractions were used to calculate the correlations among the evaluated parameters. The evaluated corn fractions presented different compositions values. The insect-damaged and mold-damaged grains presented higher CP level, lower density, and MDM and MCP coefficients compared with the other fractions. However, calculated AMEn values were not significantly different (p>0.05) among corn fractions. A low correlation between density and AMEn content (r<0.5), and a high correlation between density and MCP (r>0.8) were calculated. Although the evaluated corn fractions presented different nutritional values, there were no marked differences in their utilization by broilers.

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Section: Resultsmentioning

confidence: 97%

Utilization of Different Corn Fractions by Broilers

Costa

Stringhini

Ribeiro

et al. 2015

Rev. Bras. Cienc. Avic.

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“…Corn grain damage may be very high (Barbour et al, 2008). The main insects that infest stored corn are the weevil (Sitophilus zeamais) and the grain moth (Sitotroga cerealella), according to Stringhini et al (2000). Lopes et al (1988), working with 5, 20, 30, 40 and 50% corn grains infested by Sitophilus zeamais, found grain weight losses of 0, 5, 8, 10 and 13%, respectively, in addition to gross energy losses as infestation levels increased.…”

Section: Introductionmentioning

confidence: 99%

Quality assessment of corn batches received at a feed mill in the brazilian cerrado

Rodrigues

Stringhini

Ribeiro

et al. 2014

Rev. Bras. Cienc. Avic.

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This study aimed at investigating factors that contribute to changes in the quality of corn used in compound poultry feeds. Samples were collected from 6488 bulk cargos received at a feed mill located close to Brasília, Brazil. The parameters studied were divided into two groups: those related to corn chemical composition, including crude protein (% CP), ether extract (% EE), crude fiber (% CF), nitrogen-free extract (% NFE), and estimated metabolizable energy (ME), and corn physical characteristics, including density, moisture, and grain physical damage. High coefficients of determination (R 2 ) and low coefficients of variation (CV) were determined for the chemical and physical parameters. The analysis of variance showed low to medium R 2 . Month, year, supplier, and their interactions influenced (p <0.05) all chemical properties, as well as density, moisture, and ME. Physical characteristics were less affected by those factors, except for quantity of damaged grains. The principal component analysis separated the physical and chemical factors. The coefficients of the first component explained 54% of the total variation between variables. The first principal component showed that NFE and ME increased as humidity decreased. The second component also showed a decrease of physical problems due to reduction in humidity. Results indicate that the feed mills should take preventive measures when selecting suppliers, and diets should be formulated according to the differences in chemical and physical composition of corn supplied in different months and years.

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“…Danos mecânicos nos grãos ocorrem no transporte, na limpeza, na secagem e na colheita, dando origem a grãos quebrados e trincados, o que aumenta o teor de umidade destes e favorece o desenvolvimento de fungos. Portanto, o grão de milho, que representa importante papel na avicultura, em condições inadequadas de armazenamento, pode sofrer perdas no valor quantitativo e qualitativo, em razão do ataque de pragas e fungos, desde o campo até a época de consumo (Stringhini et al, 2000). Um quarto dos grãos produzidos no mundo está contaminado por micotoxinas (Santurio, 2000); por isso, o uso de produtos contaminados pela aflatoxina, para fabricação de rações, tem sido um grande problema para a indústria avícola, e vem causando sérias implicações econômicas (Ledoux et al, 1998).…”

Section: Introductionunclassified

Concentrações séricas de minerais e funções hepática e renal de frangos intoxicados com aflatoxina e tratados com montmorilonita sódica

Franciscato

Lopes

Santúrio

et al. 2006

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar as concentrações séricas de minerais e as funções hepática e renal de frangos de corte intoxicados, experimentalmente, com 3 ppm de aflatoxina, e submetidos a diferentes concentrações de montmorilonita sódica na dieta. Foram utilizados 720 frangos, machos, da linhagem Cobb, divididos em seis tratamentos: T1, dieta normal; T2, dieta com aflatoxina (3 ppm); T3, dieta com montmorilonita sódica (0,25%); T4, dieta com aflatoxina (3 ppm) + montmorilonita sódica (0,25%); T5, dieta com montmorilonita sódica (0,5%); T6, dieta com aflatoxina (3 ppm) + montmorilonita sódica (0,5%), com seis repetições por tratamento. A dieta com 3 ppm de aflatoxina (T2) resultou em uma diminuição significativa na concentração sérica de proteínas totais, albumina, globulinas e aspartato amino transferase; a concentração sérica de ácido úrico diminuiu, significativamente, na dieta com aflatoxina (3 ppm) + momtmorilonita sódica a 0,25%; ocorreu diminuição significativa nas concentrações séricas de fósforo na dieta com aflatoxina + montmorilonita sódica a 0,5%. A aflatoxina na concentração de 3 ppm altera a função hepática de frangos de corte; o uso da montmorilonita sódica, na concentração de 0,5%, é eficaz na prevenção dos efeitos tóxicos da aflatoxina, mas diminui os níveis séricos de fósforo.Termos para indexação: aflatoxicose, filosilicatos, proteínas, cálcio, fósforo. Seric mineral concentrations and hepatic and renal functions of chickens intoxicated by aflatoxin and treated with sodic montmorilloniteAbstract -The objective of this work was to evaluate the seric mineral concentrations and the hepatic and renal functions of broiler chicken, experimentally intoxicated with 3 ppm of aflatoxin, and submitted to different concentrations of sodic montmorillonite in the diet. In this study 720 Cobb's male broiler chickens were used, which were divided in six treatments: T1, normal diet; T2, diet with aflatoxin (3 ppm); T3, diet with sodic montmorillonite (0.25%); T4, diet with aflatoxin (3 ppm) + sodic montmorillonite (0.25%); T5, diet with sodic montmorillonite (0.50%); T6, diet with aflatoxin (3 ppm) + sodic montmorillonite (0.5%); with six repetitions of each treatment. The diet with 3 ppm of aflatoxin resulted in a significant decrease in serum concentrations of total protein, albumin, globulins and aspartate aminotransferase; there was significant decrease of seric concentration of uric acid in the diet with aflatoxin (3 ppm) + 0.25% sodic montmorillonite; in the diet with aflatoxin + 0.5% sodic montmorillonite there was significant decrease in seric concentrations of phosphorus. Aflatoxin in the diet (3 ppm) causes change in the hepatic function of broiler chickens. The use of 0.5% sodic montmorillonite is effective in preventing the toxic effects of aflatoxins, but causes decrease in phosphorus seric levels.Index terms: aflatoxicosis, phyllosilicates, proteins, calcium, phosphorus. IntroduçãoAs aflatoxinas são contaminantes naturais de alimentos (Kurtzman et al., 1987) e estão entre as mais ...

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Efeito da qualidade do milho no desempenho de frangos de corte

Cited by 16 publications

References 16 publications

Utilization of Different Corn Fractions by Broilers

Utilization of Different Corn Fractions by Broilers

Quality assessment of corn batches received at a feed mill in the brazilian cerrado

Concentrações séricas de minerais e funções hepática e renal de frangos intoxicados com aflatoxina e tratados com montmorilonita sódica

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