Data/hora: 01/06/2024 12:26:56

Provedor de dados: | 90
País: | Brazil
Título: | Nitrous Oxide Emissions in No-Tillage Onion ( Allium cepa L.) Crops Are Increased by Oilseed Radish Cover Crop and Poultry Manure Application
Autores: | 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.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | N2O; Nitrogen; Cover crop residue; Organic fertilizer; Greenhouse gases.
Resumo: | 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 systems and was higher in treatments with OR residues (2.96 ± 0.67 kg ha-1 for OR and 5.28 ± 1.04 kg ha-1 for OR + PM). The other treatments behaved similarly with emissions of approximately 1.91 ± 0.17 kg ha-1 of N-N2O. The highest N2O emissions in the field study were found within the first 15 days and represented 50.3 % of the average emissions. Poultry manure showed high emissions when the cover crop was OR, but not when it was BO and WD.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100511
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/18069657rbcs20180116
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.43 2019
Fonte: | info:eu-repo/semantics/openAccess