| Registro completo |
| Provedor de dados: |
Rev. Ciênc. Agron.
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| País: |
Brazil
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| Título: |
Ammonia volatilization from nitrogen fertilizers applied to sugarcane straw
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| Autores: |
Otto,Rafael
Zavaschi,Eduardo
Souza Netto,Gerson José Marquesi de
Machado,Bianca de Almeida
Mira,Acácio Bezerra de
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| Data: |
2017-07-01
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| Ano: |
2017
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| Palavras-chave: |
Urea
NBPT
NS 30 TM
Green cane
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| Resumo: |
ABSTRACT Maintenance of crop residues over soil surface under conservational systems limits incorporation of nitrogen fertilizers into the soil. Application of urea over crop residues enhance N-NH3 volatilization losses, justifying the usage of urease inhibitors or N sources less susceptible to volatilization under such conditions. This study aimed to evaluate volatilization losses from N sources applied over sugarcane straw. A field trial was carried out in a sugarcane field in Iracemapolis, Sao Paulo on a Typic Kandiudox in June 2014. We used a complete block experimental design, with seven treatments and four replications. Treatments included Control [CO], ammonium nitrate [AN], NS30TM (ammonium nitrate-75% and ammonium sulfate-25% fused mixture) [NS30TM], ammonium nitrate plus ammonium sulfate (ammonium nitrate-75% and ammonium sulfate-25% physical mixture) [AN-AS], urea [UR], urea treated with 0.4% Cu and 0.15% B [UR-CuB], urea treated with 530 mg kg-1 of NBPT [UR-NBPT]. Treatments were applied at rate of 100 kg ha-1 N (except CO). Volatilization losses were quantified up to 30 days after fertilization (DAF). Maximum N-NH3 occurred 16 DAF for UR and UR-CuB and 20 DAF for UR-NBPT. Accumulated N-NH3 losses ranged from 20% (UR), 17% (UR-CuB), and 14% (UR-NBPT) of applied N; non-amidic sources showed losses lower than 1%. Adding urease inhibitor to urea shows potential in reducing volatilization losses even under application over large amounts of straw.
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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=S1806-66902017000300413
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| Editor: |
Universidade Federal do Ceará
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| Relação: |
10.5935/1806-6690.20170048
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| Formato: |
text/html
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| Fonte: |
Revista Ciência Agronômica v.48 n.3 2017
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| Direitos: |
info:eu-repo/semantics/openAccess
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