Data/hora: 10/06/2024 18:42:08

Provedor de dados: | 124
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
Fonte: | info:eu-repo/semantics/openAccess