Title:	Grain yield, efficiency and the allocation of foliar N applied to soybean canopies.
Authors:	OLIVEIRA, S. M. de PIEROZAN JUNIOR, C. LAGO, B. C. ALMEIDA, R. E. M. de TRIVELIN, P. C. O. FAVARIN, J. L.
Affiliation:	SILAS MACIEL DE OLIVEIRA, ESALQ; CLOVIS PIEROZAN JUNIOR, INSTITUTO FEDERAL DE EDUCAÇÃO, Palmas-TO; BRUNO COCCO LAGO, ESALQ; RODRIGO ESTEVAM MUNHOZ DE ALMEIDA, CNPASA; PAULO CESAR OCHEUZE TRIVELIN, CENA; JOSE LAERCIO FAVARIN, ESALQ.
Date Issued:	2019
Citation:	Scientia Agricola, v. 76, n. 4, p. 305-310, jul./ago. 2019.
Description:	Soybean [Glycine max (L.) Merr.] grain yield is closely associated with the level of optimal nitrogen (N) supply, especially during the reproductive stages. Foliar fertilization with low rates of N have been considered as a strategy for furnishing additional N and enhancing grain yields. Field studies using 15N tracer were conducted over two growing seasons to investigate the impact of foliar N fertilization on grain yield, plant N content, the amount of N derived from fertilizer (NDFF) and N recovery efficiency (NRE). Four foliar N rates (0, 1300, 2600 and 3900 g ha?1) were supplied by two equal split applications at the R1 and R3 stages. Foliar N fertilization of soybean canopies did not affect grain yield, grain N content, shoot N content nor plant N content. Total NDFF was increased from 0.7 to 2.0 kg ha?1 across the N rates. Nonetheless, NRE was unaffected by foliar N fertilization, which averaged 53 %. Soybean plants allocated the same amount of N fertilizer to both grains and shoots. No significant effects of low rate foliar N fertilization were registered on soybean grain yield nor plant N content, despite considerable N fertilizer recovery by plant organs.
Thesagro:	Soja Glycine Max Nitrogênio Fertilizante Nitrogenado
NAL Thesaurus:	Soybeans Foliar application Nitrogen fertilizers
ISSN:	1678-992X
DOI:	10.1590/1678-992X-2017-0395
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPASA)