Data/hora: 04/06/2024 08:22:20

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	21/02/2018	
Data da última atualização: 	21/02/2018	
Autoria: 	BRUNETTO, G.; LORENSINI, F.; CERETTA, C. A.; FERREIRA, P. A.; COUTO, R. R.; CONTI, L.; CIOTTA, M. N.; KULMANN, M.; SCHNEIDER, R. O.; SOMAVILLA, L. M.; TIECHER, T. L.; GIACOMINI, S.; MELO, G. W. B.; CARRANCA, C. L. V. A.	
Título: 	Contribution of mineral N to young grapevine in the presence or absence of cover crops.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Journal of Soil Science and Plant Nutrition, Chile, v. 17, n. 3, p. 570-580, 2017.	
Idioma: 	Inglês	
Conteúdo: 	The presence of cover crops in vineyards may decrease the availability of nitrogen (N) derived from fertilizer
to grapevines. The present study aimed to evaluate the recovery of urea-15N and growth of young grapevines
with and without natural vegetation in plant rows. The study was conducted in southern Brazil on one-year-old
Chardonnay grapevines grown in soils with and without cover crops. The grapevines were subjected to the application
of 40 kg N ha-1 in the form of urea-15N at 3% 15N atom excess. Dry matter yield, total N and fertilizer
N were assessed in grapevines and soil layers. A small amount of N that is applied during the growing season
of the grapevines is readily assimilated by the plants. The maintenance of cover crops in young vineyards may
favor the maintenance of higher levels of N in the subsurface layers of the soil, contributing to the nutrition of
the grapevines in the following growth cycles. The presence of cover crops reduced the importance of nitrogen
fertilization in the growth cycle of grapevines because a large part of N absorbed by grapevines was derived
from other sources. Nitrogen derived from the fertilizer applied to the soil in the presence or absence of cover
crops was mainly concentrated in the newly-formed vegetative grapevine organs (leaves and shoots).	
Palavras-Chave: 	N recovery; plant N distribution; residual-15N; Urea-15N; Vitis vinifera.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40431.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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