| Registro completo |
| Provedor de dados: |
Rev. Ciênc. Agron.
|
| País: |
Brazil
|
| Título: |
Effect of fertilisation with urea on development in the ornamental bromeliad Aechmea fasciata
|
| Autores: |
Giampaoli,Patricia
Santos,Daniela Soares dos
Mollo,Luciana
Kanashiro,Shoey
Tavares,Armando Reis
|
| Data: |
2017-10-01
|
| Ano: |
2017
|
| Palavras-chave: |
Bromeliaceae
Nitrogen
Mineral nutrition
Chlorophyll
|
| Resumo: |
ABSTRACT The aim of this study was to evaluate the effect of urea fertiliser on the bromeliad, Aechmea fasciata. Plants were submitted to weekly treatments with a solution of 0.0, 0.5, 1.0, 1.5 or 2.0 g urea L-1. After 210 days of the experiment, biometric variables of growth and development of the root and shoot systems were analysed, together with foliar levels of chlorophyll a and b, and of carotenoids. The experimental design was of randomised blocks with four replications; eight plants were used per plot. The data were submitted to regression analysis. The highest values for chlorophyll a and carotenoid content were obtained at a concentration of 1.23 g L-1 urea, and for chlorophyll b at a concentration 1.75 g L-1 urea. Plants of A. fasciata submitted to a solution with no nitrogen showed marked chlorosis of the leaves and reduced growth and development. The mean value for the maximum levels of photosynthetic pigments was 1.40 g L-1 urea, and this can be used as an indicator of the nutritional status of nitrogen in the species. From the results, an application of 1.46 g L-1 urea to the tank in A. fasciata is recommended, as this gave the greatest accumulation of total dry weight and an increase in the number of leaves.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400657
|
| Editor: |
Universidade Federal do Ceará
|
| Relação: |
10.5935/1806-6690.20170076
|
| Formato: |
text/html
|
| Fonte: |
Revista Ciência Agronômica v.48 n.4 2017
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
