| Registro completo |
| Provedor de dados: |
Rev. Ciênc. Agron.
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| País: |
Brazil
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| Título: |
Nutritional value of hay from maize-crop stubble ammoniated with urea
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| Autores: |
Moreira Filho,Miguel Arcanjo
Alves,Arnaud Azevêdo
Vale,George Emanuel Silva do
Moreira,Antonia Leidiana
Rogério,Marcos Cláudio Pinheiro
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| Data: |
2013-12-01
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| Ano: |
2013
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| Palavras-chave: |
Degradation
Hay ammoniated
Maize-crop stubble as forage
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| Resumo: |
The objective of this research was to evaluate the chemical composition and in situ degradability of hay stubble from a maize crop fertilized with 40; 120 or 200 kg N ha-1, ammoniated with urea. To evaluate in situ degradability, 4 g samples were incubated in nylon bags in the rumen of cattle for 6; 24 and 72 hours. The levels of acid detergent fiber (35.4% DM) and acid detergent insoluble nitrogen (18.5% of total N) decreased, resulting in 32.7% of DM and 9.6% of the total N, and crude protein (CP) increased from 5.2 to 9.7% of DM as a result of the ammoniation with urea. The degradation of dry matter (48.7%), CP (56.5%) and neutral detergent fiber (33.6%) increased with ammoniation, averaging 54.5 and 75.4, and 38.4% respectively, but was not influenced by interaction fertilization x ammoniation x incubation time. The soluble fraction of DM and CP increased with ammoniation, and the degradation rate of b fraction was greater than 2% h-1. The ammoniation of the hay of stubble of maize-crop fertilized with 40 or 120 kg N ha-1 resulted in reduction of NDF content, fraction of the feed which best represents the cell wall. The protein content, in-situ degradability and the kinetics of dry-matter and protein degradation of the hay of stubble of maize-crop were increased by ammoniation with urea (3% in DM basis) and fertilization with 40 or 120 kg N ha-1, thus not justifying the ammoniation of corn stubble from crops fertilized with 200 kg N ha-1.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000400028
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| Editor: |
Universidade Federal do Ceará
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| Relação: |
10.1590/S1806-66902013000400028
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| Formato: |
text/html
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| Fonte: |
Revista Ciência Agronômica v.44 n.4 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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