Consulta: creatorFacets:"MARQUES, J."
Registros recuperados: 2
Data/hora: 27/07/2024 01:44:58

Fast soil solution nutrient and water dynamics in top- and subsoil.
Provedor de dados: 14
Autores: RENCK, A.; LEHMANN, J.; KAISER, K.; MARQUES, J.; TEIXEIRA, W. G.
Study for find out the short-term dynamics of applied fertilizer. In a soil pit a data logger system connected to tensiometers and TDR was installed up to a depth of 3.5m under pueraria in an agroforestry system (cupuacu, peach palm, Brazil nut, urucum). After a rainfall event, the soil water suction at 0.1m depth increased immediately, and fast responses were seen even up to a depth of 0.9m. This result may indicate that nutrients may be leached very fast even in these soil with high clay contents. The N concentrations in the soil solution relevantly increased at 0.1m depth during the same time period, as shown for peach palm. First, the ammonium concentrations increased, but nitrate contents followed rapidly indicanting a fast nitrification in the...
Tipo: Parte de livro
Palavras-chave: Brasil; Amazonas; Manaus; Tropical rain forest; Floresta Tropical Úmida; Relação Solo-Água; Soil water.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668344

Soil water availability as affected by the cover crop Pueraria phaseoloides in the central Amazon.
Provedor de dados: 14
Autores: MARQUES, J.; TEIXEIRA, W. G.; LEHMANN, J.
Study on the effects of the cover crop pueraria on soil water cycling, in Manaus-AM (Brasil). Partial results showed that under the experimental conditions, there was a higher soil water availability under the cover crop that in bare soil due to reduced evaporation from the soil surface. Under these conditions, a cover crop may play an important role in water conservation and hence crop production on Xanthic Ferralsols of the central Amazon.
Tipo: Parte de livro
Palavras-chave: Brasil; Amazonas; Manaus; Floresta Tropical Úmida; Pueraria Phaseoloides; Relação Solo-Água; Umidade do Solo; Soil water.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/669431