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16. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | ALMEIDA, H.A. de; MACHADO, R.C.R. Caracteristicas, termodinâmicas do ar no interior de platações de cacau, no Sudeste da Bahia. Revista Brasileira de Agrometeorologia, Sete Lagoas, MG, v. 16, n. 1, p. 39-48, abr. 2008. Biblioteca(s): Epagri-Sede. |
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Registro Completo
Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
15/12/2023 |
Data da última atualização: |
15/12/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
HAHN, L.; KURTZ, C.; GRAZZIOTIN, A. F.; BEE, A. M.; FELTRIM, A. L.; MACHADO, R. G. |
Título: |
Nitrogen doses and sources applied as top-dressing in onion crops grown under no-tillage and conventional tillage systems. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Revista Ceres, Viçosa, MG, v. 70, n. 6, p. 1-8, 2023. |
Idioma: |
Inglês |
Conteúdo: |
Nitrogen (N) fertilization effectiveness in onion depends on N source, as well as on soil type and management system. The aim of the study is to investigate the effect of N sources and doses applied as top-dressing on bulb yield, leaf N contents and on the postharvest conservation of onion bulbs grown under no-tillage (NTS) and conventional tillage (CTS) systems. Three experiments were carried out: two in Lebon Régis County-SC, under NTS; and one in Caçador County-SC, under CTS. The herein tested N sources comprised urea, ammonium nitrate, calcium nitrate and ammonium sulfate, in combination to N doses applied as top-dressing (70, 140, 210, 280 and 350 kg N ha-1) in addition to the control, without N. The N sources did not affect yield parameters, leaf N content and post-harvest onion losses. The maximum technical efficiency in bulb yield was observed at N doses of 195.8 and 258.4 kg ha-1 in the no-tillage system (NTS) and at 270.7 kg N ha-1 in the CTS. The NTS enabled maximum yield at N dose 47% lower than the officially recommended one. Maximum relative commercial yield was associated with 31.1 g kg-1 of leaf N. |
Thesagro: |
Allium cepa; nitrato de amônio; nitrato de cálcio; sulfato de amônio; ureia. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 01855naa a2200241 a 4500 001 1134127 005 2023-12-15 008 2023 bl uuuu u00u1 u #d 100 1 $aHAHN, L. 245 $aNitrogen doses and sources applied as top-dressing in onion crops grown under no-tillage and conventional tillage systems.$h[electronic resource] 260 $c2023 520 $aNitrogen (N) fertilization effectiveness in onion depends on N source, as well as on soil type and management system. The aim of the study is to investigate the effect of N sources and doses applied as top-dressing on bulb yield, leaf N contents and on the postharvest conservation of onion bulbs grown under no-tillage (NTS) and conventional tillage (CTS) systems. Three experiments were carried out: two in Lebon Régis County-SC, under NTS; and one in Caçador County-SC, under CTS. The herein tested N sources comprised urea, ammonium nitrate, calcium nitrate and ammonium sulfate, in combination to N doses applied as top-dressing (70, 140, 210, 280 and 350 kg N ha-1) in addition to the control, without N. The N sources did not affect yield parameters, leaf N content and post-harvest onion losses. The maximum technical efficiency in bulb yield was observed at N doses of 195.8 and 258.4 kg ha-1 in the no-tillage system (NTS) and at 270.7 kg N ha-1 in the CTS. The NTS enabled maximum yield at N dose 47% lower than the officially recommended one. Maximum relative commercial yield was associated with 31.1 g kg-1 of leaf N. 650 $aAllium cepa 650 $anitrato de amônio 650 $anitrato de cálcio 650 $asulfato de amônio 650 $aureia 700 1 $aKURTZ, C. 700 1 $aGRAZZIOTIN, A. F. 700 1 $aBEE, A. M. 700 1 $aFELTRIM, A. L. 700 1 $aMACHADO, R. G. 773 $tRevista Ceres, Viçosa, MG$gv. 70, n. 6, p. 1-8, 2023.
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