Data/hora: 29/05/2024 01:10:46

Provedor de dados: | Acta Scientiarum: Agronomy
País: | Brazil
Título: | Can an increase in nitrogen rate mitigate damages caused by uneven spatial distribution of maize plants at the sowing row?
Autores: | Kolling, Daniel Fernando; Sangoi, Luís; Leolato, Lucieli Santini; Panison, Fernando; Coelho, Antonio Eduardo; Kuneski, Hugo François.
Data: | 2019-03-13
Ano: | 2019
Palavras-chave: | Zea mays; Spatial variability; Nitrogen side-dress; Grain yield.
Resumo: | An uneven distribution of maize plants at the sowing row can decrease grain yield. This work was carried out to evaluate the effect of an increasing nitrogen rate on maize agronomic performance under different variation coefficients of plant spatial distributions at the sowing row. The experiment was conducted in Lages, Santa Catarina State, South Brazil. Three variation coefficients (VC) of plant spatial distribution (0, 50, and 100%) were tested. At the 0 level, seeds were evenly distributed 17 cm from each other. In the other treatments with uneven spatial distributions, the distances between two neighbouring seeds ranged from 2 to 54 cm. Four nitrogen side-dress rates (0, 125, 250, and 375 kgN ha-1) were evaluated. The increase in VC of plant spatial distribution decreased the leaf area and the relative chlorophyll content of the index leaf at silking, regardless of the nitrogen rate. When the variation coefficient of seed placement was enhanced from 0 to 100%, such behaviour contributed to a decrease in the number of kernels per ear and the grain yield. Therefore, increasing the amount of N was not an efficient strategy for preventing yield losses caused by irregular plant spatial distribution at the sowing row.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39874

10.4025/actasciagron.v41i1.39874

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39874/pdf
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; Vol 41 (2019): Publicação Contínua; e39874

Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e39874

1807-8621

1679-9275

Fonte:

Copyright (c) 2019 Acta Scientiarum. Agronomy

https://creativecommons.org/licenses/by/4.0