Data/hora: 13/06/2024 08:18:45

Provedor de dados: | 90
País: | Brazil
Título: | Effects of nickel and nitrogen soil fertilization on lettuce growth and urease activity
Autores: | Oliveira,Thomas Carlos; Fontes,Renildes Lúcio Ferreira; Rezende,Sebastião Tavares de; Víctor Hugo,Alvarez V.
Data: | 2013-06-01
Ano: | 2013
Palavras-chave: | Ammonium nitrate; Urea; Plant nutrition; Lactuca sativa L.
Resumo: | Nickel is a micronutrient involved in nitrogen metabolism and a constituent of the urease molecule. Plant growth and urease activity were evaluated in lettuce (Lactuca sativa L.) grown in soil-filled pots in a 2 x 8 factorial design with two nitrogen (N) sources and eight Ni rates, with five replications. Nitrogen was applied at 200 mg dm-3 (half the dose incorporated into the soil at seedling transplanting and half top-dressed later) using the sources NH4NO3 (AN) and CO(NH2)2 (Ur). The Ni treatments (0, 2, 4, 8, 12, 16, 24 and 32 mg dm-3) were applied as NiCl2. The shoot dry-matter yield, leaf urease activity, Ni levels in the lettuce leaves and Ni levels extracted from soil with Mehlich-3 (M-3) and DTPA were determined. In the plants supplied with AN, the shoot dry-matter yield was higher than in those supplied with Ur. There was no difference in shoot dry matter in response to soil-applied Ni. The leaf urease activity increased with Ni application, regardless of the N source. The extractions with M-3 and DTPA were efficient to evaluate Ni availability for lettuce in the Red-Yellow Latosol.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300016
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832013000300016
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.37 n.3 2013
Fonte: | info:eu-repo/semantics/openAccess