| Registro completo |
| Provedor de dados: |
Rev. Ciênc. Agron.
|
| País: |
Brazil
|
| Título: |
Nitrogen utilization efficiency by naturally colored cotton cultivars in semi-arid region
|
| Autores: |
Tartaglia,Francilene de Lima
Souza,Almir Rogerio Evangelista de
Santos,Allysson Pereira dos
Barros Júnior,Aurélio Paes
Silveira,Lindomar Maria da
Santos,Manoel Galdino dos
|
| Data: |
2020-01-01
|
| Ano: |
2020
|
| Palavras-chave: |
Gossypium hirsutum L.
Recovery efficiency
Dry matter accumulation
|
| Resumo: |
ABSTRACT Knowledge on nitrogen (N) utilization efficiency in colored cotton enables the correct management of N fertilizers, optimizing yield and minimizing environmental degradation.The objective of this study was to evaluate the N utilization efficiency and to determine the accumulation of dry matter and N by naturally colored cotton cultivars subjected to N fertilization in the Brazilian semi-arid region.The experiment was carried out under field conditions, at the Farm of the Federal Rural University of the Semi-Arid, in 2016 and 2017. The experimental design was in randomized blocks with split plots and four replicates, randomizing five N doses (0; 50; 100; 150 and 200 kg ha-1) in the main plot and four colored cotton cultivars (BRS Safira, BRS Rubi, BRS Topázio and BRS Verde) in the subplots. Dry matter and N accumulations, agronomic, recovery, agrophysiological and physiological efficiencies in N utilization, and harvest index were evaluated. Cotton accumulates around 130 kg ha-1 of N along its cycle and directs 56.3% to seeds, 29% to leaves, 10.6% to stem and 3.8% to fibers. Nitrogen agronomic efficiency and recovery efficiency decrease with increased N doses. The cultivar BRS Topázio is the most responsive to N fertilization and the cultivar BRS Verde is the least responsive.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400401
|
| Editor: |
Universidade Federal do Ceará
|
| Relação: |
10.5935/1806-6690.20200061
|
| Formato: |
text/html
|
| Fonte: |
Revista Ciência Agronômica v.51 n.4 2020
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
