Data/hora: 09/06/2024 02:35:43

Biblioteca(s): | Embrapa Milho e Sorgo.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | Nacional - B
Data corrente: | 10/03/2009
Data da última atualização: | 23/05/2018
Autoria: | MARTINS, A. O.; CAMPOSTRINI, E.; MAGALHAES, P. C.; GUIMARAES, L. J. M.; DURAES, F. O. M.; MARRIEL, I. E.; NETTO, A. T.
Afiliação: | Amanda Oliveira Martins, UENF; Eliemar Campostrini, UENF; PAULO CESAR MAGALHAES, CNPMS; LAURO JOSE MOREIRA GUIMARAES, CNPMS; Frederico Ozanan Machado Durães, Embrapa Milho e Sorgo; IVANILDO EVODIO MARRIEL, CNPMS; Alena Torres Netto, UENF.
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, 2008.
Idioma: | Inglês
Conteúdo: | The purpose ofthis 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-l) and high (120 kg ha-J) 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 reductasefor this purposeJurther studies are needed on the reliability ofthis 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: | Chlorophyll content; Leafnitrogen; Yield.
Thesagro: | Zea Mays.
Thesaurus Nal: | nitrogen.
Categoria do assunto: | S Ciências Biológicas
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/66413/1/Nitrogen-use.pdf
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (21452-1) - UPC - AP - DD -  -  -  - DIS