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- Title
ALFACE SUBMETIDA À ADUBAÇÃO NITROGENADA E TENSÕES DE ÁGUA NO SOLO EM AMBIENTE PROTEGIDO.
- Authors
dos Santos Carvalho, Kassio; Koetz, Marcio; Bonfim da Silva, Edna Maria; Araújo da Silva, Tonny José; Avelino Cabral, Carlos Eduardo
- Abstract
Lettuce is a culture demanding in water consumption and the adequate irrigation management is major, as well as nitrogen fertilization because it stimulates the development of the plant. This study aimed to evaluate the effect of soil water tensions and nitrogen levels in the development of American lettuce. The experiment was conducted in a greenhouse and the experimental design was completely randomized, in a 4x5 factorial scheme, with four water tension levels in the soil (15, 30, 45 and 60 kPa) and five levels of nitrogen fertilization (0, 50, 100, 150 and 200 mg dm-3), totaling 20 treatments, with four replications. The nitrogen source used to urea and tensions were controlled by tensiometers installed at 10 cm depth in the experimental units fertilized with 100 mg dm-3 nitrogen. In the absence of nitrogen fertilization and higher water deficit, there was a higher production of dry mass root. The nitrogen fertilization should be between 136.66 and 168.72 kg ha-1 for a crop to present its highest agronomic performance and soil maintained at 15 kPa.
- Subjects
IRRIGATION management; WATER levels; PLANT development; NITROGEN in water; SOIL moisture; FERTIGATION; NITROGEN fertilizers; WATER consumption
- Publication
Revista Brasileira de Agricultura Irrigada - RBAI, 2019, Vol 13, Issue 4, p3498
- ISSN
1982-7679
- Publication type
Article
- DOI
10.7127/rbai.v13n4001003