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| Pôrto,Mônica LA; Alves,Jailson do C; Souza,Adailson P de; Araújo,Raunira da C; Arruda,Jandeilson A de; Tompson Júnior,Ubaldo A. |
| A produção da alface em hidroponia apresenta crescente expansão no Brasil, mas ainda ocorrem problemas de qualidade e risco de acúmulo de nitrato. O objetivo desse trabalho foi avaliar a produção da alface (cv. Elba) e acúmulo de nitrato em hidroponia em função de níveis crescentes de N na solução nutritiva. Plantas de alface foram cultivadas em estufa telada da UFPB em Areia (PB), em solução nutritiva que continha níveis crescentes de N (11, 13, 15, 17, 19 e 21 mmol L-1) por 25 dias. O delineamento utilizado foi inteiramente casualizado com quatro repetições. Foram avaliadas a produção total (PTT), produção comercial (PCM) e os teores de nitrato na matéria fresca da raiz, caule e folhas da alface. Não foram verificados efeitos significativos do incremento... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Solução nutritiva; Qualidade nutricional. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000300030 |
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| Pôrto,Mônica L; Alves,Jailson do C; Souza,Adailson P de; Araújo,Raunira da C; Arruda,Jandeilson A de. |
| Lettuce is one of the leading vegetables in Brazil. However, studies concerning its fertilization for the Northeastern region of the country are still scarce. This work was carried out to evaluate the effects of mineral Nitrogen supply and organic fertilization on the production and nitrate accumulation in lettuce, cultivar Elba, in the semi-arid zone of Paraíba, Brazil. A randomized block design, with four replications, was used to test five doses of cattle manure (30; 60; 90; 120, and 150 t ha-1), five doses of N supplied as urea (30; 60; 90; 120, and 150 kg ha-1), and a control without fertilization. Along with mineral N, the other nutrients were also supplied using mineral sources. No additional nutrients were supplied where organic fertilization was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa L.; Lettuce; Cattle manure; Urea; Yield. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000200019 |
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| Cardoso,Marinice O; Oliveira,Ademar P de; Pereira,Walter E; Souza,Adailson P de. |
| The stem growth, nutrition, and fruit yield of eggplant grown with different doses of cattle manure (CM) and magnesium thermophosphate (MT) were studied, according to the Central Composite Matrix of Box (8.3-518; 8.3-3,018; 48.3-518; 48.3-3,018; 0.0-1,768; 56.6-1,768; 28.3-0.0; 28.3-3,536; 28.3-1,768). Potassium sulfate (KS) was also used (24 g plant-1), as well as a cow urine (COU) solution (10 L 100 L-1 H2O, 500 mL plant-1), applied five times in topdressing. Two additional treatments were used: MT without COU and triple superphosphate + urea (TS plus Ur), both with nutrient levels (CM, P2O5, and KS) corresponding to the combination 28.3-1,768. The experimental design was blocks at random, with three replications. CM doses improved plant height (PH)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum melongena; Organic fertilization; Alternative fertilization management; Unconventional fertilization. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362009000300008 |
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