Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados AGRIAMBI (2) Autor Cova,Alide M. W. (2) Azevedo Neto,André D. de (1) Costa,Oldair V. (1) Freitas,Fabio T. O. de (1) Loureiro,Diego C. (1) Rafael,Maria R. S. (1) Sacramento,José A. A. S. do (1) Santos,Jorge A. G. (1) Soares,Tales M. (1) Viana,Paula C. (1) Mais... Palavra-chave Alternative farming (1) Caatinga (1) Carbon emission factor (1) Geostatistics (1) Lactuca sativa (1) NFT and DFT systems (1) Salinity (1) Soilless cultivation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2017 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Spatial variability and changes in carbon stocks of a Regosols (Psamments) cultivated with sisal AGRIAMBI Sacramento,José A. A. S. do; Santos,Jorge A. G.; Loureiro,Diego C.; Costa,Oldair V.; Cova,Alide M. W.. ABSTRACT Information on spatial variability and soil carbon stocks after the conversion of Caatinga vegetation to different cropping systems is scarce. This study aimed to characterize the spatial variability and to evaluate the changes in carbon stocks and the emission of greenhouse gases after the conversion of Caatinga vegetation with different sisal cultivation systems. The study was carried out in three areas in the city of Valente, Bahia, two areas that had been cultivated for 20 years with sisal in either a traditional (TSC) or alternative (ASC) system, and the third area containing natural Caatinga vegetation. The cultivated soils were sampled at 40 soil sampling points with 15 × 10 m spacing at depths of 0-0.20 and 0.20-0.40 m. Total organic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Geostatistics; Alternative farming; Caatinga; Carbon emission factor. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001100764 Content of inorganic solutes in lettuce grown with brackish water in different hydroponic systems AGRIAMBI Cova,Alide M. W.; Freitas,Fabio T. O. de; Viana,Paula C.; Rafael,Maria R. S.; Azevedo Neto,André D. de; Soares,Tales M.. ABSTRACT The objective of this study was to evaluate the growth and accumulation of ions in lettuce grown in different hydroponic systems and recirculation frequencies. The experimental design was randomized blocks with 8 treatments and 4 replicates. The evaluated hydroponic systems were Nutrient Flow Technique (NFT) and an adapted Deep Flow Technique (DFT), the latter with recirculation frequencies of 0.25, 2 and 4 h. Both systems used fresh water and brackish water. Plant growth, accumulation of inorganic solutes (Na+, K+, Cl- and NO3-) and the correlation between dry matter production and Na+/K+ and Cl-/NO3- were evaluated. The salinity of the water used to prepare the nutrient solution caused decrease in growth and K+ and NO3- levels, and increased... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soilless cultivation; Lactuca sativa; Salinity; NFT and DFT systems. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300150 Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco