| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Dry matter production and nitrogen use efficiency of giant missionary grass in response to pig slurry application
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| Autores: |
Miranda,Mario
Scheffer-Basso,Simone Meredith
Escosteguy,Pedro Alexandre Varella
Lajús,Cristiano Reschke
Scherer,Eloi Erhard
Denardin,Rosiane Berenice Nicoloso
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| Data: |
2012-03-01
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| Ano: |
2012
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| Palavras-chave: |
A. jesuiticus × A. scoparius
Organic fertilization
Pasture
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| Resumo: |
This study assessed the effect of successive applications of pig slurry on the dry matter (DM) production and the nitrogen use efficiency of giant missionary grass along two years. A total of 55, 110, 165, 220 and 275 m³ of pig slurry/ha/year were applied in order to supply 100, 200, 300, 400 and 500 kg of total N/ha/year, respectively. These treatments were compared with the ammonium nitrate (200 kg of N/ha/year) source of N and with a control (no nitrogen application). Annually, nitrogen was applied in four divided doses, after the cutting of forage grasses, which takes place five times a year. The total DM yield did not differ between years and increased linearly as a function of pig slurry application, ranging from 2,698 kg of DM/ha/year (control) to 11,371 kg of DM/ha/year (275 m³ of pig slurry/ha/year). There was an increment of 32.3 kg of DM/m³ of pig slurry/ha or 17.7 kg of DM/kg of N/ha. The highest average daily DM accumulation rate (66.8 kg of DM/ha/day) was achieved with the highest pig slurry rate, from February/2007 to April/2008. Nitrogen use efficiency did not differ across pig slurry rates (19.0 kg of DM/kg of N), but it was lower than that obtained with ammonium nitrate (30.3 kg of DM/kg of N). The efficiency index of pig slurry ranged from 0.52 to 0.72.
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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=S1516-35982012000300009
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982012000300009
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.41 n.3 2012
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| Direitos: |
info:eu-repo/semantics/openAccess
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