Data/hora: 09/06/2024 13:28:16

Provedor de dados: | 90
País: | Brazil
Título: | Nitrogen Transfer from Cover Crop Residues to Onion Grown under Minimum Tillage in Southern Brazil
Autores: | 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.
Data: | 2017-01-01
Ano: | 2017
Palavras-chave: | Allium cepa L.; Plant 15N recovery; Residue N; Plant N partition; Soil 15N.
Resumo: | 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 harvest, but in general, N in plant organs was derived from sources other than the cover crop residues. In addition, leaf N was in the proper range for all treatments and was adequately mobilized to the bases for bulbing. The N derived from decomposing residues contributed little to onion development and the use of these plants should be chosen based on their advantages for physical and biological soil quality.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100528
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/18069657rbcs20160347
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.41 2017
Fonte: | info:eu-repo/semantics/openAccess