Data/hora: 11/06/2024 00:53:56

Provedor de dados: | 86
País: | Brazil
Título: | Corn agronomic traits and recovery of nitrogen from fertilizer during crop season and off-season
Autores: | Fuentes,Luis Felipe Garcia; Souza,Luiz Carlos Ferreira de; Serra,Ademar Pereira; Rech,Jerusa; Vitorino,Antonio Carlos Tadeu.
Data: | 2018-10-01
Ano: | 2018
Palavras-chave: | Zea mays; N-fertilizer management; Plant nutrition; Soil fertility; Soil-N supply.
Resumo: | Abstract: The objective of this work was to evaluate corn agronomic traits in a cultivation subjected to different N rates, during the fall-winter (off-season) and spring-summer crop seasons, and N recovery from fertilizer. The experiment was set up in a randomized complete block design with four replicates, in a 5x2 factorial arrangement, with the following treatments: five N topdressing rates - 0, 30, 60, 90, and 120 kg ha-1 -, using urea as source; and two crop seasons, fall-winter and spring-summer. The following variables were determined: plant height, height of the first ear insertion, number of grains per ear, diameter and length of ear, 1,000-grain weight, N concentration in the leaves and grains, grain-protein concentration, grain yield, N recovery from fertilizer, and soil-N supply. Nitrogen rates in the fertilizer in the fall-winter season had no effect on grain yield, although corn agronomic traits showed a greater reliance on fertilizer-N rates in that season than in the spring-summer, which is a season associated to a greater capacity of soil-N supply to plants. The quantification of soil-N supply enabled knowing the nutrient dynamics during the fall-winter and the spring-summer seasons, which may be useful to guide N fertilization of corn.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001001158

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/s0100-204x2018001000009
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.53 n.10 2018
Fonte: | info:eu-repo/semantics/openAccess