Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia
The objective of this study was to determine the efficiency of two N fertilizers, (NH4)2SO4 and urea, for rice (Oryza sativa L.) and rye-grass (Lolium multiflorum L.) cultivated in an Ultisol of central Amazonia using 15N as a tracer. Rice was cultivated in the field, while rye-grass was grown in a...
| Autor principal: | Alfaia, Sonia Sena |
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| Outros Autores: | Guiraud, Gérard, Jacquin, Fernand, Muraoka, Takashi, Ribeiro, Gilberto A. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Biology and Fertility of Soils
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19185 |
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oai:repositorio:1-19185 |
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oai:repositorio:1-19185 Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia Alfaia, Sonia Sena Guiraud, Gérard Jacquin, Fernand Muraoka, Takashi Ribeiro, Gilberto A. Ammonium Sulfate Brasil Grain Yield Hydrolysis Microbial Activity Nitrification Nitrogen 15 Nitrogen Fertilizer Nitrogen Uptake Nitrogen Utilization Plant Growth Soil Acidity Tracer Urea Crop Yield Fertilizer Application Grass Nitrogen Performance Assessment Rice Ultisol Amazonia Brasil Lolium Multiflorum Oryza Sativa The objective of this study was to determine the efficiency of two N fertilizers, (NH4)2SO4 and urea, for rice (Oryza sativa L.) and rye-grass (Lolium multiflorum L.) cultivated in an Ultisol of central Amazonia using 15N as a tracer. Rice was cultivated in the field, while rye-grass was grown in a phytotron. Fertilization with (NH4)2SO4 caused a 16% increase in the yield of rice grains and urea a 36% increase. In both crops total N uptake and N use efficiency of the fertilizers were higher for urea than for (NH4)2SO4. The low values for N derived from fertilizer showed that the fertilizers contributed little to the total N absorbed by the plants. The 'priming effect' or positive added N interaction (ANI) between the fertilizer N and soil organic N was observed, especially with urea. Immobilization by soil microorganisms was greater in the presence of urea, while losses were always higher with the (NH4)2SO4 treatments. These losses were significant, and their reduction should allow more efficient use of this N fertilizer. It is possible that the N use efficiency was higher for urea due to a pH increase, caused by urea hydrolysis, which in turn may have favoured the activity of nitrifying bacteria in this extremely acid soil. 2020-06-15T22:06:07Z 2020-06-15T22:06:07Z 2000 Artigo https://repositorio.inpa.gov.br/handle/1/19185 10.1007/s003740050664 en Volume 31, Número 3-4, Pags. 329-333 Restrito Biology and Fertility of Soils |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Ammonium Sulfate Brasil Grain Yield Hydrolysis Microbial Activity Nitrification Nitrogen 15 Nitrogen Fertilizer Nitrogen Uptake Nitrogen Utilization Plant Growth Soil Acidity Tracer Urea Crop Yield Fertilizer Application Grass Nitrogen Performance Assessment Rice Ultisol Amazonia Brasil Lolium Multiflorum Oryza Sativa |
| spellingShingle |
Ammonium Sulfate Brasil Grain Yield Hydrolysis Microbial Activity Nitrification Nitrogen 15 Nitrogen Fertilizer Nitrogen Uptake Nitrogen Utilization Plant Growth Soil Acidity Tracer Urea Crop Yield Fertilizer Application Grass Nitrogen Performance Assessment Rice Ultisol Amazonia Brasil Lolium Multiflorum Oryza Sativa Alfaia, Sonia Sena Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| topic_facet |
Ammonium Sulfate Brasil Grain Yield Hydrolysis Microbial Activity Nitrification Nitrogen 15 Nitrogen Fertilizer Nitrogen Uptake Nitrogen Utilization Plant Growth Soil Acidity Tracer Urea Crop Yield Fertilizer Application Grass Nitrogen Performance Assessment Rice Ultisol Amazonia Brasil Lolium Multiflorum Oryza Sativa |
| description |
The objective of this study was to determine the efficiency of two N fertilizers, (NH4)2SO4 and urea, for rice (Oryza sativa L.) and rye-grass (Lolium multiflorum L.) cultivated in an Ultisol of central Amazonia using 15N as a tracer. Rice was cultivated in the field, while rye-grass was grown in a phytotron. Fertilization with (NH4)2SO4 caused a 16% increase in the yield of rice grains and urea a 36% increase. In both crops total N uptake and N use efficiency of the fertilizers were higher for urea than for (NH4)2SO4. The low values for N derived from fertilizer showed that the fertilizers contributed little to the total N absorbed by the plants. The 'priming effect' or positive added N interaction (ANI) between the fertilizer N and soil organic N was observed, especially with urea. Immobilization by soil microorganisms was greater in the presence of urea, while losses were always higher with the (NH4)2SO4 treatments. These losses were significant, and their reduction should allow more efficient use of this N fertilizer. It is possible that the N use efficiency was higher for urea due to a pH increase, caused by urea hydrolysis, which in turn may have favoured the activity of nitrifying bacteria in this extremely acid soil. |
| format |
Artigo |
| author |
Alfaia, Sonia Sena |
| author2 |
Guiraud, Gérard Jacquin, Fernand Muraoka, Takashi Ribeiro, Gilberto A. |
| author2Str |
Guiraud, Gérard Jacquin, Fernand Muraoka, Takashi Ribeiro, Gilberto A. |
| title |
Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| title_short |
Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| title_full |
Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| title_fullStr |
Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| title_full_unstemmed |
Efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an Ultisol of Brazilian Amazonia |
| title_sort |
efficiency of nitrogen-15-labelled fertilizers for rice and rye-grass cultivated in an ultisol of brazilian amazonia |
| publisher |
Biology and Fertility of Soils |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19185 |
| _version_ |
1787141158784204800 |
| score |
11.653393 |