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| Müller Júnior,Vilmar; Koucher,Leoncio de Paula; Souza,Monique; Lima,Andria Paula; Kurtz,Claudinei; Couto,Rafael da Rosa; Lovato,Paulo Emílio; Giacomini,Sandro José; Brunetto,Gustavo; Comin,Jucinei José. |
| ABSTRACT The use of cover crops and poultry manure (PM) is an alternative to reduce the use of synthetic inputs and can contribute to the nutrient cycling in onions ( Allium cepa L.) grown under a no-tillage system. However, this management practice may contribute to an increase in N2O emissions to the atmosphere. The aims of this study were to evaluate the immediate effect on N2O emissions of adding PM onto cover crop residues and to verify the effect of different no-tillage systems on N2O emissions. Two studies (laboratory and field) were conducted with the addition of oilseed radish (OR), black oat (BO), and weed (WD) residues with and without PM under a no-tillage (NT) system. Emission of N2O (kg ha-1) was influenced by the different residue-management... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: N2O; Nitrogen; Cover crop residue; Organic fertilizer; Greenhouse gases. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100511 |
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| Oliveira,Rodolfo Assis de; Brunetto,Gustavo; Loss,Arcângelo; Gatiboni,Luciano Colpo; Kürtz,Claudinei; Müller Júnior,Vilmar; Lovato,Paulo Emílio; Oliveira,Bruno Salvador; Souza,Monique; Comin,Jucinei José. |
| ABSTRACT Cover crops contribute to nutrient cycling and may improve soil chemical properties and, consequently, increase crop yield. The aim of this study was to evaluate cover crop residue decomposition and nutrient release, and the effects of these plants on soil chemical properties and on onion (Allium cepa L.) yield in a no-tillage system. The experiment was carried out in an Inceptisol in southern Brazil, where cover crops were sown in April 2012 and 2013. In July 2013, shoots of weeds (WD), black oats (BO), rye (RY), oilseed radish (RD), oilseed radish + black oats (RD + BO), and oilseed radish + rye (RD + RY) were cut at ground level and part of these material from each treatment was placed in litter bags. The litter bags were distributed on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Nutrient cycling; No-till system. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100520 |
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| Koucher,Leoncio de Paula; Brunetto,Gustavo; Müller Júnior,Vilmar; Souza,Monique; Lima,Andria Paula; Giacomini,Sandro José; Couto,Rafael da Rosa; Kurtz,Claudinei; Carranca,Corina Luisa Videira de Abreu Fernandes; Comin,Jucinei José. |
| ABSTRACT Nitrogen derived from cover crop residues may contribute to the nutrition of onion grown under minimum tillage (MT) and cultivated in rotation. The aim of this study was to evaluate the N transferred from different cover crop residues to the onion crop cultivated under MT in southern Brazil. In June 2014, oilseed radish, black oat, and oilseed radish + black oat residues labeled with 15N were deposited on the soil surface before transplanting onions. During the growth season and at harvest, young expanded onion leaves, complete plants, and samples from different soil layers were collected and analyzed for recovery of 15N-labeled residue. Oilseed radish decomposed faster than other residues and 4 % of residue N was recovered in leaves and bulbs at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa L.; Plant 15N recovery; Residue N; Plant N partition; Soil 15N. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100528 |
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| Souza,Monique; Comin,Jucinei José; Leguizamón,Eduardo Sixto; Kurtz,Claudinei; Brunetto,Gustavo; Müller Júnior,Vilmar; Ventura,Bárbara; Camargo,Ana Paula. |
| O cultivo e a deposição de resíduos de plantas de cobertura em sistema plantio direto podem afetar os atributos químicos do solo e a produção de cebola. O trabalho objetivou avaliar a interferência do cultivo de plantas de cobertura sobre a produção de cebola e sobre os atributos químicos do solo em sistema plantio direto (SPD) agroecológico. O experimento foi conduzido na EPAGRI, em Ituporanga (SC), em um Cambissolo Húmico, nas safras de 2010 e 2011. Em abril, foram implantados os tratamentos: testemunha com vegetação espontânea (T1); cevada (2010)/aveia-preta (2011) (T2); centeio (T3); nabo-forrageiro (T4); centeio + nabo-forrageiro (T5); e cevada (2010)/aveia-preta (2011) + nabo-forrageiro (T6). Aos 60, 80 e 95 dias após a semeadura (DAS) das espécies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação verde; Disponibilidade de nutrientes; Allium cepa L.. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000100004 |
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