| Registro completo |
| Provedor de dados: |
Horticultura Brasileira
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| País: |
Brazil
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| Título: |
Evaluation of sources, doses and application schedules of nitrogen on drip-irrigated tomato
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| Autores: |
Marouelli,Waldir A
Souza,Ronessa B
Braga,Marcos B
Silva,Washington LC
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| Data: |
2014-09-01
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| Ano: |
2014
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| Palavras-chave: |
Solanum lycopersicon
Processing tomato
Determinate growth
Fertigation
Nutritional status
Economic analysis
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000300327
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| Editor: |
Associação Brasileira de Horticultura
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| Relação: |
10.1590/S0102-05362014000300015
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| Formato: |
text/html
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| Fonte: |
Horticultura Brasileira v.32 n.3 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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