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Metabolizable energy of corn hybrids for broiler chickens at different ages Ciência e Agrotecnologia
Kato,Reinaldo Kanji; Bertechini,Antonio Gilberto; Fassani,Edison José; Brito,Jerônimo Avito Gonçalves de; Castro,Solange de Faria.
We determined the values of apparent metabolizable (AME), apparent corrected (AMEn), true (TME) and true corrected (TMEn) energy of six corn hybrids for broiler chickens in phases 1-7, 8-14, 15-21, 22-28, 29-35 and 36-42 day-old birds, using the substitution method (40%) of reference diet with the test ingredient. Ross-308 male chicks (1,134) were allotted to metabolism cages and the number of birds per experimental unit was adjusted to suit each bird's density stage in the cage, using six replicates. Simultaneously, birds continue to fast for the determination of metabolic and endogenous losses for each study phase. The birds received water and food ad libitum during the experimental period. The birds were maintained in metabolism cages for seven days,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy content; Flint corn; Dent corn; Semi-dent corn; Soft corn.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600024
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Performance of Holstein cows fed sugarcane or corn silages of different grain textures Scientia Agricola
Corrêa,Clóvis Eduardo Sidnei; Pereira,Marcos Neves; Oliveira,Simone Gisele de; Ramos,Marcelo Hentz.
Corn cultivated in Brazil is predominantly of hard texture, and more propense to decreased starch digestibility under late harvesting situations than dent hybrids. This work tested the utilization of dent corn as a way of extending the ensilage period without reducing animal performance, and evaluated the potential of sugarcane as a forage for high-producing dairy cows. Nine lactating Holstein cows were allocated to three 3 ' 3 latin squares and were fed 200 g of forage neutral detergent fiber per kg of dry matter as either hard texture corn ensiled at the half milk line stage of maturity, soft texture corn ensiled at the black layer stage, or sugarcane. There were no detectable differences between corn hybrids with regard to milk yield (34.2 vs 34.6 kg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flint corn; Dent corn; Digestibility; Stage of maturity.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400003
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Ruminal degradability of hard or soft texture corn grain at three maturity stages Scientia Agricola
Pereira,Marcos Neves; Von Pinho,Renzo Garcia; Bruno,Ralph Guilherme da Silva; Calestine,Gabriela Arruda.
The predominance of vitreous endosperm in hard texture flint corn (Zea mays L.) can decrease ruminal starch digestion comparatively to the farinaceous endosperm of dent corn, reducing energy content of the grain. The objective of this experiment was to evaluate the effects of texture and maturity stage on ruminal degradability of corn grain. Two dent and two flint hybrids were harvested at the early dent, half milk line, and black layer stages. The proportion of vitreous endosperm (vitreousness) in dent hybrids was 44.3%, while in flint it was 67.0%. There was a linear increase in vitreousness with advancing maturity. Flint hybrids at the early dent stage were more vitreous than dent at the black layer stage. The increase in vitreousness per maturation day...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitreousness; Endosperm; Dent corn; Flint corn; Rumen.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400002
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Type of corn and grinding degree in a concentrate supplied to suckling calves R. Bras. Zootec.
Ferreira,Cibele Santos; Silva,Fabiano Ferreira da; Veloso,Cristina Mattos; Bonomo,Paulo; Oliveira,Julinessa Silva; Silva,Vinícius Lopes da; Schio,Alex Resende; Ítavo,Luís Carlos Vínhas.
The objective was to assess the effects of a concentrate consisting of two types of corn: flint and dent, with three different grinding degrees (1, 3 and 5 mm), as a function of intake, performance and digestibility of three crossbred dairy suckling heifers. A randomized block design involving 54 crossbred heifers in a 2 × 3 factorial arrangement was used to assess intake and performance patterns. In order to assess digestibility, the experimental design was completely randomized, consisting of 24 crossbred heifers. Weighting and measurements of height at withers and thoracic perimeter were performed. There was no significant interaction between grinding degree and corn type for any of the studied variables. The daily intake of concentrate dry matter was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dent corn; Early weaning; Flint corn; Initial concentrate.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600024
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