Data/hora: 16/06/2024 16:13:24

Provedor de dados: | 75
País: | Brazil
Título: | Evaluation of sources, doses and application schedules of nitrogen on drip-irrigated tomato
Autores: | Marouelli,Waldir A; Souza,Ronessa B; Braga,Marcos B; Silva,Washington LC.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Solanum lycopersicon; Processing tomato; Determinate growth; Fertigation; Nutritional status; Economic analysis.
Resumo: | We aimed to establish strategies for nitrogen (N) fertilization on drip-irrigated determinate-growth-habit tomato, under Cerrado conditions of Central Brazil. Three field experiments were carried out in a randomized block design. In experiment I six N doses (0, 80, 160, 240, 320 and 400 kg ha-1 N) were tested, in experiment II six combinations of the N forms (nitric; ammonium; amide; 2/3 nitric + 1/3 ammonium; 2/3 nitric + 1/3 amide; and 1/3 nitric + 2/3 amide) were evaluated, and in experiment III the combination of three soil pre-plant fertilization fractions (0, 20 and 40%) was evaluated with two splitting schemes of the remaining N via fertigation (linear and adjusted N-uptake curve). SPAD chlorophyll index and N content were measured in the leaves of tomato plants on experiment I. The physical and economic yields of tomato crop were maximized for the doses of 287 kg N ha-1 and 270 kg N ha-1, respectively, with doses of 2.1 g and 2.0 g of N per kg of commercial fruit. The yield was maximized for 52 SPAD units. The combinations of forms and the application schedules of N had no significant effect on the yield components of the tomato crop.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000300327
Editor: | Associação Brasileira de Horticultura
Relação: | 10.1590/S0102-05362014000300015
Formato: | text/html
Fonte: | Horticultura Brasileira  v.32 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess