| Registro completo |
| Provedor de dados: |
Phyton
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| País: |
Argentina
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| Título: |
Comparative effectiveness of two nitrogen sources for corn fertilization
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| Autores: |
Copperi,MZ
Mandolesi,ME
Cantamutto,MA
Ron,MM
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| Data: |
2013-06-01
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| Ano: |
2013
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| Palavras-chave: |
Fertilizer technology
Nitrogen recovery
Substitution value
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| Resumo: |
Corn has not only a high growth potential and a great capacity of biological response to suitable crop management but also may contribute to a better match of crops with environmental offer in Argentina. Nitrogen (N) fertilization must make provision for eventual N losses, and fertilization strategies must be designed so as to minimize their global incidence. The diferent quick-release N sources show similar efciencies when they are incorporated, but in surface applications, sources that contain little or no amidic N have a better performance than urea (U). The objective of this paper was to make an evaluation of corn response to N applied in V6 without incorporation, using two different solid N sources. A field experiment was carried out during 2004, in a farm located 30 km away from General Pico (La Pampa, Argentina), to evaluate corn response to N rates (0 - 120 kg/ha) sidedressed in V6 without incorporation, using U or a commercial mixture of ammonium nitrate and dolomite (ND). Rainfall and temperatures were ideal during the crop cycle. The excellent growing conditions reflected in high corn yields. The results showed that N fertilization afected virtually all yield components. Yield was on average 2417 kg of grain/ha greater in the ND than in the U treatments. For a N rate below 85 kg/ha, agronomic efficiency was of 65 and 87 kg of corn per kg of applied N for U and ND, respectively. Apparent fertilizer N recovery was 1.14 and 1.34 kg absorbed N per kg applied N for U and ND, respectively. For the kind of soil, cultivar and growing conditions of the experiment, a substitution value of 1.6 can be used to estimate ND-N rates from models developed for U-N.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100014
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| Editor: |
Fundación Rómulo Raggio
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| Formato: |
text/html
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| Fonte: |
Phyton (Buenos Aires) v.82 n.1 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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