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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
15/05/2018 |
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Data da última atualização: |
15/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
REIS, A. F. de B.; VASCONCELOS, A. L. S.; ALMEIDA, R. E. M. de; LAGO, B. C.; DIAS, C. T. S.; FAVARIN, J. L. |
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Afiliação: |
ANDRE FROES DE BORJA REIS, ESALQ; ANA LUISA SOARES VASCONCELOS, ESALQ; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; BRUNO COCCO LAGO, ESALQ; CARLOS TADEU SANTOS DIAS, ESALQ; JOSE LAERCIO FAVARIN, ESALQ. |
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Título: |
Relationship of nitrogen and crop performance in aerobic rice and continuous flooding irrigation in weathered tropical lowland. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
European Journal of Agronomy, v. 95, p. 14-23, Apr. 2018. |
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DOI: |
10.1016/j.eja.2018.01.016 |
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Idioma: |
Inglês |
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Conteúdo: |
Aerobic rice is a promising rice production system which enables rice to grow in water-constrained environments and provides an alternative to continuous flooding irrigation. Although significant water savings are reported in aerobic systems in different lowland regions, a negative impact in crop performance prevents its wide deployment. The main reasons for grain yield decreases are given to be genotype and inappropriate water supply. However, agronomic practices such nitrogen management can interfere in overall crop performance of rice due to the influence of soil moisture on N availability to crop uptake. The goal of this research was to establish a relationship between nitrogen use and crop performance by comparing flooding conditions to aerobic rice in a tropical environmental with adequate water supply. A field experiment was carried out from 2014 to 2016 with an experimental design of split plot with irrigation regime (IR) in the main plot: continuous flooding (CF) and non-flooding aerobic (NF), and in the subplot fertilizer nitrogen rates: (0, 50, 150 and 250 kg ha−1). Crop above ground biomass (AGB) and nitrogen uptake (NU) were quantified during crop development only in the 0 and 150 kg ha−1 subplots, as was the relationship between AGB, NU, grain yield and its components and all nitrogen rates at harvest. The aerobic rice provided higher NU throughout rice development. At harvesting, NU and panicle density (PD) had different relationships to N rates among CF and NF, with NF showing 18% higher NU and 27% PD across years and N rate. The grain yield (GY) relationship to N rates was also distinct in 2014 and 2015, and GY across N rates in NF was 20% and 12% higher than CF for 2014 and 2015, respectively. We conclude that lowland rice managed through aerobic system improves nitrogen uptake by rice crop as long the water filled space remains around 60%. MenosAerobic rice is a promising rice production system which enables rice to grow in water-constrained environments and provides an alternative to continuous flooding irrigation. Although significant water savings are reported in aerobic systems in different lowland regions, a negative impact in crop performance prevents its wide deployment. The main reasons for grain yield decreases are given to be genotype and inappropriate water supply. However, agronomic practices such nitrogen management can interfere in overall crop performance of rice due to the influence of soil moisture on N availability to crop uptake. The goal of this research was to establish a relationship between nitrogen use and crop performance by comparing flooding conditions to aerobic rice in a tropical environmental with adequate water supply. A field experiment was carried out from 2014 to 2016 with an experimental design of split plot with irrigation regime (IR) in the main plot: continuous flooding (CF) and non-flooding aerobic (NF), and in the subplot fertilizer nitrogen rates: (0, 50, 150 and 250 kg ha−1). Crop above ground biomass (AGB) and nitrogen uptake (NU) were quantified during crop development only in the 0 and 150 kg ha−1 subplots, as was the relationship between AGB, NU, grain yield and its components and all nitrogen rates at harvest. The aerobic rice provided higher NU throughout rice development. At harvesting, NU and panicle density (PD) had different rel... Mostrar Tudo |
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Thesagro: |
Arroz; Irrigação; Nitrogênio. |
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Thesaurus Nal: |
Aerobic conditions; Grain yield; Irrigation; Plinthaquults; Rice. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
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Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
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| 6. |  | MACHADO, T. M. M.; PIRES, L. C.; ARAUJO, A. M. Conservação e melhoramento genético de caprinos com o auxílio de caracteres morfológicos e biométricos. In: XIMENES, L. J. F.; MARTINS, G. A.; MORAIS, O. R. de; COSTA, L. S. de A.; NASCIMENTO, J. L. S. do (Coord.). Ciência e tecnologia na pecuária de caprinos e ovinos. Fortaleza: Banco do Nordeste do Brasil, 2010. Cap. 14. p. 363-379 (Série BNB. Ciência e Tecnologia, 5).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 12. | | PIRES, L. S.; SILVA, M. L. N.; CURI, N.; LEITE, F. P.; BRITO, L. de F. Erosão hídrica pós-plantio em florestas de eucalipto na região centro-leste de Minas Gerais. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 4, p. 687-695, abr. 2006 Título em inglês: Water erosion in post-planting eucalyptus forests at center-east region of Minas Gerais State, Brazil.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 16. | | TEIXEIRA, P. C.; CAMPOS, D. V. B. de; PIRES, L. de O. B. Sais solúveis. In: TEIXEIRA, P. C.; DONAGEMMA, G. K.; FONTANA, A.; TEIXEIRA, W. G. (Ed.). Manual de métodos de análise de solo. 3. ed. rev. e ampl. Brasília, DF: Embrapa, 2017. pt. 2, cap. 20, p. 299-317.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 89 | |
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