Data/hora: 22/06/2024 02:39:46

Biblioteca(s): | Embrapa Agricultura Digital.
Data corrente: | 03/06/2009
Data da última atualização: | 30/11/2010
Autoria: | MARTINS, A. O; COMPOSTRINI, E.; MAGALHÃES, P. C.; GUIMARÃES, L. J. M.; DURÃES, F. O. M.; MARRIEL, I. E.; TORRES NETTO, A.
Afiliação: | AMANDA OLIVEIRA MARTINS, UENF/CCTA/LMGV; ELIEMAR CAMPOSTRINI, UENF/CCTA/LMGV; PAULO CESAR MAGALHÃES, CNPMS; LAURO JOSÉ MOREIRA GUIMARÃES, CNPMS; FREDERICO OZANAN MACHADO DURÃES, CNPAE; IVANILDO EVÓDIO MARRIEL, CNPMS; ALENA TORRES NETTO, UENF/CCTA/LMGV.
Título: | Nitrogen-use efficiency of maize genotypes in contrasting environments.
Ano de publicação: | 2008
Fonte/Imprenta: | Crop Breeding and Applied Biotechnology, Londrina, v. 8, n. 4, p. 291-298, Dec. 2008.
Idioma: | Inglês
Conteúdo: | The purpose of this study was to evaluate the nitrogen-use efficiency of 15 corn hybrids in different environments. The experiment was conducted at the research station Embrapa Milho e Sorgo, in environments with low (12 kg ha-1) and high (120 kg ha -1) nitrogen fertilization, in a randomized block design with three replications. The chlorophyll content, leaf nitrogen and nitrate reductase activity in the flag leaf were determined at flowering and the grain yield was evaluated at harvest. The chlorophyll content proved to be sensitive to nitrogen availability, although without discriminating genotypic differences efficiently. To use nitrate reductase for this purpose, further studies are needed on the reliability of this biochemical variable to diagnose genotypes efficient in N use precociously. The hybrid L2xL3 was considered promising for maize breeding programs aimed at gene introgression related to N-use efficiency.
Palavras-Chave: | Adubação nitrogenada; Nitrogênio foliar; Teor de clorofila; Zea mays L.
Thesagro: | Agricultura; Biotecnologia; Genética; Milho; Produtividade.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Agricultura Digital (CNPTIA)
Exemplares: | CNPTIA - (13100-1) - ADD - AP - PP -  -  -  - DIS