Data/hora: 26/06/2024 16:19:52

Biblioteca(s): | Epagri-Sede.
Data corrente: | 15/12/2017
Data da última atualização: | 15/12/2017
Autoria: | KOUCHER, L. P.; BRUNETTO, G.; MÜLLER JÚNIOR, V.; SOUZA, M.; LIMA, A. P.; GIACOMINI, S. J.; KURTZ, C.; COUTO, R. R.; CARRANCA, C. L. V. A. F.; COMIN, J. J.
Título: | Nitrogen Transfer from Cover Crop Residues to Onion Grown under Minimum Tillage in Southern Brazil.
Ano de publicação: | 2017
Fonte/Imprenta: | Revista Brasileira de Ciência do solo, Viçosa, MG, v. 41, p. 1-10, 2017.
Idioma: | Inglês

Conteúdo:

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 di&#64256;erent 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 di&#64256;erent 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

Palavras-Chave: | Allium cepa L; plant 15N recovery; plant N partition; residue N; soil 15N.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40245.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
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