Consulta: subjectFacets:"Fertigation"
Registros recuperados: 54
Data/hora: 16/06/2024 17:50:44

Ratoon sugarcane yield integrated drip-irrigation and nitrogen fertilization
Provedor de dados: 70
Autores: Uribe,Raúl A. M.; Gava,Glauber J. de C.; Saad,João C. C.; Kölln,Oriel T.
The aim of this study was to compare the use of water and nitrogen on ratoon sugarcane during irrigated and rain-fed conditions, and to assess the production potential of stalks and sugar with different rates of N-fertilizer on the subsurface drip-irrigated management. The experimental design was a randomized block with four replications for each experiment and treatments: (T1) irrigated, 0kg N ha-1; (T2) irrigated, 70kg N ha-1; (T3) irrigated, 140kg N ha-1; (T4) irrigated, 210kg N ha-1; (T5) not irrigated, 0kg N ha-1, and (T6) not irrigated, 140kg N ha-1. Biometric, technological, dry matter and yield variables were analyzed among the treatments. The irrigation system together with the application of N-fertilizer at 140kg ha-1 presented significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Nitrogen; Water stress; Sacharum spp.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600005

Evaluation of the effect of the seed extract of Moringa oleifera Lam over the efficiency of organic filters in wastewater treatment of dairy cattle breeding
Provedor de dados: 70
Autores: Francisco,João P.; Silva,Jonathas B. G.; Roque,Odir C. C.; Nascentes,Alexandre L.; Silva,Leonardo D. B.
This study aimed to evaluate the effect of Moringa oleifera Lam extract on the removal of total solids (TS), total suspended solids (TSS) and chemical oxygen demand (COD), in different filter media for treating wastewater of dairy cattle breeding (DCW). The moringa seed extract was obtained by grinding 50 g of seeds in one liter of distilled water and, after passing the solution through a quantitative paper filter of 25 microns, 60 mL of the extract were added to wastewater from cattle breeding before the filtration process in organic filters made of thin coal, bamboo leaves, eucalyptus leaves, gliricidia branches and sawdust. This was followed by the completely randomized experimental design, adopting a factorial of 5 x 2. Aliquots of filtered effluent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coagulant; Fertigation; Water treatment.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000100015

SOIL SOLUTION DISTRIBUTION IN SUBSURFACE DRIP IRRIGATION IN SUGARCANE
Provedor de dados: 70
Autores: Souza,Claudinei F.; Bizari,Douglas R.
Abstract Given the lack of studies on subsurface drip irrigation in sugarcane plantations, there has been a growing demand for such information, mainly regarding soil solution profile and availability to plants. Thus, this study aimed to evaluate the effects of soil-water solution distribution on qualitative and quantitative traits of sugarcane irrigated by subsurface drip irrigation at two flows (1.6 and 3.5 L h−1). For each application rate, four PVC containers (500 L) were used and filled with sandy soil, where a set of 36 TDR probes was installed. Drippers were placed at a depth of 0.30 m. Irrigation was managed based on TDR daily measurements, maintaining soil moisture within the root zone at field capacity. Sugarcane variety used was RB 845210, being...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Flow rate; Wetted soil volume; TDR.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200217

CHEMICAL PROPERTIES OF SOIL FERTIRRIGATED WITH DAIRY AND SLAUGHTERHOUSE WASTEWATER
Provedor de dados: 70
Autores: Oliveira,Jacineumo F. De; Rodrigues,Fernando N.; Fia,Ronaldo; Vilela,Hévelyn S.; Landim,Daniela V.
ABSTRACT The aim of this study was to evaluate the soil chemical properties submitted to fertigation with slaughterhouse (SW) and dairies (DW) wastewater. The experiment was conducted in the Environmental Engineering Center and Sanitary of UFLA/MG in PVC columns filled with Dark Red Latosol (Oxisol) and randomly distributed. The treatments applied with nitrogen based load (300 kg ha years-1 of N) consisted of four doses of SW and DW (100, 200, 300 and 400% of the recommendation) and AQT0 control at random. The soil was collected at a depth of 0.30 m and, subsequently, characterized in terms of physical, chemical and physicochemical. The application of treatment of the largest irrigation of DW provided, after 120 days of monitoring, N concentration of 1.85...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil quality; Fertigation; Plant nutrition; Agroindustrial wastewater.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601244

Growth and development of lettuce plants at high NH4+:NO3- ratios in the nutrient solution
Provedor de dados: 75
Autores: Andriolo,Jerônimo L; Godoi,Rodrigo dos S; Cogo,Clarissa M; Bortolotto,Orcial C; Luz,Gean L da; Madaloz,José Carlos.
Lettuce plants, cv. Vera, were grown at five NH4+:NO3- ratios in the nutrient solution in a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the composition of, in mmol L-1, 11.0 NO3-; 1.5 H2PO4-; 6.5 SO4--; 7.5 Ca++; 10.0 K+ and 1.5 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0.05 Cu; 0.50 B; 0.04 Mo, and 4.82 chelate Fe. Ammonium nitrate was used to supply NH4+ concentrations of 2.5; 5; 7.5 and 10 mmol L-1, reaching NH4+:NO3- ratios of 0:11 (T1); 2.5:13.5 (T2); 5:16 (T3); 7.5:18.5 (T4) and 10:21 mmol L-1 (T5) as treatments. A completely randomized experimental design was used, with four replications and 20 plants per plot. Four plants of each plot were harvested at 25 days after planting, to determine shoot and root dry mass, shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Fertigation; Hydroponics; Ammonium.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362006000300016

Growth and yield of lettuce plants under salinity
Provedor de dados: 75
Autores: Andriolo,Jerônimo L.; Luz,Gean L. da; Witter,Maiquel H.; Godoi,Rodrigo dos S.; Barros,Gisele T.; Bortolotto,Orcial C.
Lettuce plants, cv. Vera, were grown under five salinity levels in a hydroponical experimental set-up using a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the following composition, in mmol L-1: 16.9 NO3-; 2.0 H2PO4-; 1.0 SO4- 4.0 Ca++; 10.9 K+ e 1.0 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0,05 Cu; 0,50 B; 0,04 Mo, and 4.82 chelated Fe. The five salinity levels compared as treatments were obtained by varying the concentration of the standard nutrient solution, reaching average electrical conductivities (EC) of 0.80; 1.93; 2.81; 3.73 and 4.72 dS m-1, for T1, T2, T3, T4 and T5, respectively. The nutrient solution at each salinity level was supplied from a reservoir by means of a flooded-type electrical pump, for 15 minutes, at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Fertigation; Hydroponics; Salinity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000400014

Evaluation of sources, doses and application schedules of nitrogen on drip-irrigated tomato
Provedor de dados: 75
Autores: Marouelli,Waldir A; Souza,Ronessa B; Braga,Marcos B; Silva,Washington LC.
We aimed to establish strategies for nitrogen (N) fertilization on drip-irrigated determinate-growth-habit tomato, under Cerrado conditions of Central Brazil. Three field experiments were carried out in a randomized block design. In experiment I six N doses (0, 80, 160, 240, 320 and 400 kg ha-1 N) were tested, in experiment II six combinations of the N forms (nitric; ammonium; amide; 2/3 nitric + 1/3 ammonium; 2/3 nitric + 1/3 amide; and 1/3 nitric + 2/3 amide) were evaluated, and in experiment III the combination of three soil pre-plant fertilization fractions (0, 20 and 40%) was evaluated with two splitting schemes of the remaining N via fertigation (linear and adjusted N-uptake curve). SPAD chlorophyll index and N content were measured in the leaves of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicon; Processing tomato; Determinate growth; Fertigation; Nutritional status; Economic analysis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000300327

Fertirrigação.
Provedor de dados: 14
Autores: PINTO, J. M.; SILVA, D. J.; BORGES, A. L.; COELHO, E. F.; FEITOSA FILHO, J. C.
Vantagens e limitações da fertirrigação; fatores relacionados ao tipo de solo e à qualidade de água de irrigação, aos fertilizantes utilizados na fertirrigação; compatibilidade entre os fertilizantes utilizados na fertirrigação; perigo de corrosão; equipamentos para fertirrigação; exigências nutricionais da mangueira; manejo da fertirrigação; automação e medidas de segurança na fertirrigação.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Nutrientes; Fertilizer applications; Management; Adubação; Fertirrigação; Manga; Manejo; Fertigation; Mangoes; Nutrients.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/144914

Fertirrigação na cultura do melão.
Provedor de dados: 14
Autores: PINTO, J. M.
bitstream/item/90547/1/Digitalizar0019.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Fertilizer applications; Melon.; Melão; Adubação; Fertirrigação.; Fertigation; Melons.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/129047

Aplicação de fertilizantes via fertirrigação.
Provedor de dados: 14
Autores: SILVA, D. J.
Fertirrigação e nutrição de plantas; Solubilidade dos fertilizantes; Compatibilidade dos fertilizantes; Efeito do fertilizantes no pH da solução e no pH do solo; Salinidade e potencial salino dos fertilizantes; Algumas características do fertilizantes.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Aplicação; Nutrição de planta; Tolerância; Resistance.; Irrigação; Fertilizante; Fertirrigação; Salinidade.; Fertigation; Fertilizer application; Irrigation; Plant nutrition; Salinity.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134003

Equipamento para pesquisa de irrigação em fruteiras tropicais com controle automático de aplicação de água.
Provedor de dados: 14
Autores: NOGUEIRA, L. C.; COSTA, A. S. da; BARRETO, A. N.; GORNAT, B.; AGUIAR NETTO, A. de O.
E apresentado um estudo de caso, os equipamentos e os esquemas de montagem para possibilitar a realização de pesquisa de irrigação, com três sistemas e três lâminas aplicados a três fruteiras tropicais, com fertirrigação e controle automático da aplicação de água.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Irrigation equipment; Tropical fruits; Localized irrigation; Watering.; Automação; Equipamento de Irrigação; Fruta Tropical; Fertirrigação; Irrigação Localizada; Manejo de Água.; Automation; Fertigation; Water management.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/370881

Limite operacional de injetores tipo Venturi em funcao de suas dimensoes e dos diferenciais de pressao.
Provedor de dados: 14
Autores: FEITOSA FILHO, J. C.; BOTREL, T. A.; ARRUDA, N. T. de; PINTO, J. M.; MENDONCA, F. C.
Um experimento foi instalado no Laboratorio de Hidraulica da ESALQ/USP visando avaliar o limite operacional de injetores tipo Venturi em funcao das dimensoes desses injetores e dos diferenciais de pressao disponiveis no sistema. Trabalhou-se com quatro injetores operando em diferentes condicoes hidraulicas. Dentre os resultados constatou-se que o inicio do funcionamento desses injetores deu-se proximo aos 10% dos diferenciais de pressao em relacao as pressoes de servico, e que o final do funcionamento deu-se entre 55% e 60% desse referencial. As dimensoes dos injetores influenciaram mais seus limites operacionais e desempenho que as pressoes de servico. As vazoes succionadas, as perdas de carga e os rendimentos quando avaliados em funcoes dos diferenciais...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Quimigacao; Injetor Venturi; Venturi injectors; Fertirrigação; Chemigation; Fertigation.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132032

Fertirrigação na cultura do meloeiro.
Provedor de dados: 14
Autores: SOARES, J. M.; COSTA, N. D.; FARIA, C. M. B. de; BRITO, L. T. de L.; CHOUDHURY, M. M.; PINTO, J. M.
bitstream/CPATSA/8235/1/INT20.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivo; Cultivation; Melon.; Melão; Adubação; Cucumis Melo; Fertirrigação.; Fertilizer application; Fertigation; Melons.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133426

Cultivo protegido do tomateiro.
Provedor de dados: 14
Autores: MAKISHIMA, N.; CARRIJO, O. A.
bitstream/item/141465/1/digitalizar0057.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Controle; Fertirrigation; Pest insects; Control; Diseases.; Cultivo Protegido; Doença; Fertirrigação; Inseto; Lycopersicon Esculentum; Irrigação; Praga; Tomate.; Fertigation; Irrigation; Insects; Protected cultivation; Tomatoes.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/765429

Manejo da irrigacao e fertirrigacao na cultura da mangueira.
Provedor de dados: 14
Autores: SILVA, E. M.; PINTO, A. C. de Q.; AZEVEDO, J. A.
bitstream/item/101500/1/doc-61.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Mango; Management; Brasil; Brasília; Cultivo; Fertirrigation; Planaltina.; Fertirrigação; Manga; Irrigação; Mangifera Indica.; Manejo; Crop management; Fertigation; Irrigation.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/556741

Aplicação de CO2 via água de irrigação em meloeiro.
Provedor de dados: 14
Autores: PINTO, J. M.; BOTREL, T. A.; MACHADO, E. C.; FEITOSA FILHO, J. C.
bitstream/CPATSA/7791/1/INT16.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Melon.; Melão; Cucumis Melo; Dióxido de Carbono; Fertirrigação; Fotossíntese; Fruto; Qualidade.; Carbon dioxide; Fruit quality; Fertigation; Melons; Photosynthesis.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132856

Cultivo do meloeiro sob fertirrigação por gotejamento no Meio-Norte do Brasil.
Provedor de dados: 14
Autores: SOUSA, V. F. de; RODRIGUES, B. H. N.; ATHAYDE SOBRINHO, C.; COELHO, E. F.; VIANA, F. M. P.; SILVA, P. H. S. da.
O objetivo desta publicacao foi apresentar os resultados de pesquisas desenvolvidas com a cultura do melao pela Embrapa Meio-Norte, envolvendo a avaliacao de cultivares, manejo de irrigacao e fertirrigacao por gotejamento em solos arenosos de Tabuleiros Costeiros, respaldados por outras informacoes disponiveis na literatura sobre a cultura e coloca-las ao alcance do usuario.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Cultivation; Disease; Conservation.; Conservação; Cucumis Melo; Doença; Melão; Variedade.; Fertigation; Varieties.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/56428

Fertirrigação.
Provedor de dados: 14
Autores: COELHO, E. F.; COELHO FILHO, M. A.; OLIVEIRA, A. M. G.
Tipo: Parte de livro
Palavras-chave: Fertirrigação; Mamão; Fertigation; Papayas.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1143983

Adubação nitrogenada via água de irrigação para o tomateiro.
Provedor de dados: 14
Autores: FARIA, C. M. B. de; PINTO, J. M.; SOARES, J. M.; COSTA, N. D.; BRITO, L. T. de L.; SILVA, D. J.
Este trabalho tem como objetivo difundir os resultados de pesquisas referentes a doese e períodos de aplicação de nitrogênio (N), via água de irrigação, para cultura de tomate.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Adubação nitrogenada; Fertilizer applications.; Fertirrigação; Irrigação; Tomate.; Fertigation; Irrigation; Nitrogen; Tomatoes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134059

Fertirrigação - adubação via água de irrigação.
Provedor de dados: 14
Autores: PINTO, J. M.; SOARES, J. M.
No sentido de gerar tecnologias para areas irrigadas, o Centro de Pesquisa Agropecuaria do Tropico Semi-Arido (CPATSA) - EMBRAPA vem desenvolvendo pesquisas visando solucionar os problemas e definir criterios tecnicos da aplicacao de fertilizantes atraves de sistema de irrigacao. Este trabalho aborda consideracoes gerais, vantagens da fertirrigacao, limitacoes, equipamentos de injecao de fertilizantes, tecnicas de fertirrigacao, tipos de fertilizantes (liquidos e solidos), elementos nutritivos e manejo da fertirrigacao.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fertilizer applications.; Irrigação; Adubação; Água; Fertilizante; Fertirrigação.; Irrigation; Fertigation; Water.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132863

Nutrição mineral.
Provedor de dados: 14
Autores: SILVA, D. J.
Introdução; Aspectos gerais da nutrição: nitrogênio, fósforo, potássio, cálcio, magnésio, enxofre, boro, cobre, ferro, manganês, zinco, molibdênio, cloro; Avaliação do estado nutricional; Amostragem e análise de solo; Amostragem e análise de planta; Calagem; Adubação: adubação de plantio, adubação de crescimento; adubação de produção; Irrigação e fertirrigação.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Videira; Nutrição mineral; Adubação de plantio; Uva; Solo; Nutrição; Calagem; Adubação; Irrigação; Fertirrigação; Grapes; Plant nutrition; Irrigation; Fertigation; Nitrogen.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1082017

Aspectos tecnicos da fertirrigacao.
Provedor de dados: 14
Autores: PINTO, J. M.
bitstream/item/136322/1/ID-8678.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Bomba injetora; Injetor; Management.; Irrigação; Equipamento; Fertirrigação; Manejo; Tecnologia.; Irrigation; Equipment; Fertigation; Technology.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134001

Teores foliares de fósforo e zinco, produtividade e crescimento de café irrigado
Provedor de dados: 86
Autores: Scalco,Myriane Stella; Alvarenga,Livia Alves; Guimarães,Rubens José; Dominghetti,Anderson Willian; Colombo,Alberto; Assis,Gleice Aparecida; Abreu,Giselle Figueiredo.
O objetivo deste trabalho foi avaliar os efeitos da irrigação sobre as concentrações foliares de P e Zn e sobre a produtividade e o crescimento do cafeeiro (Coffea arabica), cultivado em plantio tradicional e adensado. Utilizou-se o delineamento experimental de blocos ao acaso, em arranjo de parcelas subdivididas, com quatro repetições. As parcelas corresponderam às densidades de plantio (3.333 e 10.000 plantas ha-1), e as subparcelas corresponderam às lâminas d'água, aplicadas por quatro manejos de irrigação: início da irrigação, quando a tensão d´água no solo à profundidade de 0,25 m atingia valores próximos a 20 ou 60 kPa; turno fixo de irrigação (três vezes por semana), de acordo com o balanço hídrico climatológico; e testemunha sem irrigação. Em 2009,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Densidade de plantio; Estado nutricional; Fertirrigação; Interação entre nutrientes; Coffea arabica; Planting density; Nutritional status; Fertigation; Nutrient interaction.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000200095

Organic and Nitrogen Fertilization of Soil under ‘Syrah’ Grapevine: Effects on Soil Chemical Properties and Nitrate Concentration
Provedor de dados: 90
Autores: Silva,Davi José; Bassoi,Luís Henrique; Rocha,Marlon Gomes da; Silva,Alexsandro Oliveira da; Deon,Magnus Dall’Igna.
ABSTRACT Viticulture is an activity of great social and economic importance in the lower-middle region of the São Francisco River valley in northeastern Brazil. In this region, the fertility of soils under vineyards is generally poor. To assess the effects of organic and nitrogen fertilization on chemical properties and nitrate concentrations in an Argissolo Vermelho-Amarelo (Typic Plinthustalf), a field experiment was carried out in Petrolina, Pernambuco, on Syrah grapevines. Treatments consisted of two rates of organic fertilizer (0 and 30 m3 ha-1) and five N rates (0, 10, 20, 40, and 80 kg ha-1), in a randomized block design arranged in split plots, with five replications. The organic fertilizer levels represented the main plots and the N levels, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Soil solution; Carbon; Micronutrients; Vitis vinifera.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100503

Potassium fertilization via fertigation and conventional application on quality of tomato fruits
Provedor de dados: 91
Autores: Rebouças Neto,Mário de O.; Azevedo,Benito M. de; Viana,Thales V. de A.; Mesquita,José B. R. de; Carvalho,Marco A. R. de; Carvalho,Lilian C. C. de.
ABSTRACT The tomato crop plays an important environmental, economic and even social role, especially for creating employment and income. The present work aims to evaluate the effects of potassium (K) drip fertigation and of conventional K fertilization on the tomato crop quality. The experiment was conducted under field conditions, in the period between August 2011 and December 2011, in Fortaleza, CE, Brazil. The experimental design was in randomized blocks in a factorial arrangement and the treatments corresponded to doses (D1 = 200, D2 = 400 and D3 = 800 kg K2O ha-1) and K fertilizing methods (F1 - Fertigation and F2 - Conventional fertilization), plus an additional control (without K fertilization) for each fertilizing method, with four replicates. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Fertigation; KCl; Postharvest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000913

Cultivation of gerbera irrigated with treated domestic effluents
Provedor de dados: 91
Autores: Damasceno,Lisânea M. O.; Andrade Júnior,Aderson S. de; Gheyi,Hans R.
This paper evaluates the nutritional impact on growth, production and quality variables of gerbera crop when fertigated with treated domestic effluents. An experiment was carried out in greenhouse at the Embrapa Meio-Norte in Teresina, in the State of Piauí, Brazil, from July to October 2007. A completely randomized experimental design with five treatments and five replications was adopted. The treatments investigated were T1 - 100% of water and nutritional requirements of crop were met with chemical fertigation (N e K2 O); T2 - 25% volume of water through fertigation and 75% treated wastewater effluents (TWE); T3: 50% volume of water through fertigation and 50% TWE; T4: 75% volume of water with fertigation and 25% TWE; and T5 - 100% volume of water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water reuse; Fertigation; Gerbera jamesonii.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000600003

Heterogeneous salinity in the root system of bell pepper in greenhouse
Provedor de dados: 91
Autores: Oliveira,Francisco de A. de; Alves,Rita de C.; Bezerra,Francisco M. S.; Lima,Luan A.; Medeiros,Ana S. de; Silva,Nicolly K. C.
ABSTRACT The split-root technique was used as a strategy to reduce saline stress on pepper. A completely randomized design with six treatments and four replicates was used. The treatments consisted of six saline water application strategies (T1 - salinized nutrient solution (S1 = 1.4 dS m-1) during the whole cycle; T2 - salinized nutrient solution (S2 = 4.5 dS m-1) throughout the cycle, T3 - S1 and S2 throughout the cycle, using two emitters and without splitting the root system, T4 - S1 and S2, using two emitters and splitting the root system by a plastic film, T5 - S1 and S2, using two emitters and splitting the root system, alternating the solutions every 15 days, T6 - S1 and S2, using two emitters and without splitting the root system, alternating the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum L.; Saline water; Fertigation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800519

Photo-selective nets and potassium concentrations on Costus lasius crop
Provedor de dados: 91
Autores: Sampaio,Pedro R. F.; Rodrigues,Paulo H. V.; Duarte,Sergio N.; Sousa Neto,Osvaldo N. de; Nascimento,Jéssica G.; Piedade,Sônia M. de S.
ABSTRACT The practice of using different photo-selective nets, associated with the technique of fertigation, represents a new agrotechnological concept that aims to promote specific physiological responses for growth and production, which are regulated by light. The aims of the study were to evaluate the effect of photo-selective nets and potassium concentrations in the fertigation solution on the horticultural performance of Costus lasius. The study was conducted at the Universidade de São Paulo, ESALQ, Piracicaba, SP, Brazil. Three experiments were carried out separately to evaluate five potassium concentrations in the fertigation solution (40, 80, 120, 160 and 200 mg L-1) under three colours of photo-selective nets (red, blue and black) in a randomized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ornamental flowers; Potted flowers; Fertigation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000300143

Characterization of venturi injector using dimensional analysis
Provedor de dados: 91
Autores: Sobenko,Luiz R.; Frizzone,José A.; Camargo,Antonio P. de; Saretta,Ezequiel; Rocha,Hermes S. da.
ABSTRACT Venturi injectors are commonly employed for fertigation purposes in agriculture, in which they draw fertilizer from a tank into the irrigation pipeline. The knowledge of the amount of liquid injected by this device is used to ensure an adequate fertigation operation and management. The objectives of this research were (1) to carry out functional tests of Venturi injectors following requirements stated by ISO 15873; and (2) to model the injection rate using dimensional analysis by the Buckingham Pi theorem. Four models of Venturi injectors were submitted to functional tests using clean water as motive and injected fluid. A general model for predicting injection flow rate was proposed and validated. In this model, the injection flow rate depends on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Buckinghan Pi theorem; Irrigation equipment; Fertigation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700484

Swine farm wastewater and mineral fertilization in corn cultivation
Provedor de dados: 91
Autores: Pereira,Pâmela A. M.; Sampaio,Silvio C.; Reis,Ralpho R. dos; Rosa,Danielle M.; Correa,Marcus M.
ABSTRACT In the long run, swine wastewater can provide benefits to the soil-plant relationship, when its use is planned and the potential environmental impacts are monitored. The objective of this study was to investigate the effects of continuous application of swine wastewater, associated with mineral fertilization, after six years of management in no-tillage and crop rotation (14 production cycles), on the chemical conditions of the soil and the corn crop. The doses of wastewater were 0, 100, 200, 300 m3 ha-1 during the cycle. The effects of the association between mineral fertilization at sowing and swine wastewater were evaluated simultaneously. Swine wastewater at the dose of 100 m3 ha-1 promoted availability and absorption of P, K+, Mg2+ and Zn2+...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Water reuse; Swine waste.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100049

Hydraulic performance of drippers with different waters and lateral line slopes
Provedor de dados: 91
Autores: Szekut,Flavio D.; Azevedo,Carlos A. V. de; Boas,Marcio A. V.; Zuculotto,Thiago.
ABSTRACT The operation of drip lateral lines is affected by the topography of the irrigated area and represent, depending on the type of water applied, changes in the discharge characteristics of the emitters. The research had as objective to evaluate the hydraulic performance of built-in labyrinth drippers, non-pressure compensating, with different waters and slopes of the lateral lines. The experiment was carried out on a test bench and consisted of a randomized block design with split-plots: first factor with four types of water, representing the plots: clean water, water with fertilizers, cassava starch wastewater and poultry slaughterhouse wastewater; second factor with slopes of the lateral line, constituting the sub-plots: upslope, level and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Shewhart’s control charts; Labyrinth drippers.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200813

Soil attributes and quality under treated domestic sewage irrigation in sugarcane
Provedor de dados: 91
Autores: Barbosa,Eduardo A. A.; Matsura,Edson E.; Santos,Leonardo N. S. dos; Nazário,Aline A.; Gonçalves,Ivo Z.; Feitosa,Daniel R. C.
ABSTRACT Using domestic sewage to irrigate and supply nutrients to plants is a sustainable practice; however, due to the physical and chemical properties of the domestic sewage, soil attributes and quality may be changed with its application. The aim of this study was to evaluate soil quality after two cycles of sugarcane irrigated with treated domestic sewage and surface reservoir water via subsurface drip irrigation, with and without nutritional supplementation by fertigation, and a non-irrigated control with top-dressing fertilization. Soil quality was established by applying the methodology proposed by Karlen &amp; Stott. Physical, chemical and microbiological indicators were selected to compose the basic soil functions used to determine the quality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil functions; Water reuse; Subsurface drip; Fertigation; Soil acidification.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200137

Potassium fertilizer applied by different methods in the zucchini crop
Provedor de dados: 91
Autores: Fernandes,Carlos N. V.; Azevedo,Benito M. de; Camargo,Débora C.; Dias,Chrislene N.; Rebouças Neto,Mario de O.; Costa,Fellype R. B.
ABSTRACT Aiming to evaluate the effect of potassium (K) doses applied by the conventional method and fertigation in zucchini (Cucurbita pepo L.), a field experiment was conducted in Fortaleza, CE, Brazil. The statistical design was a randomized block, with four replicates, in a 4 x 2 factorial scheme, which corresponded to four doses of K (0, 75, 150 and 300 kg K2O ha-1) and two fertilization methods (conventional and fertigation). The analyzed variables were: fruit mass (FM), number of fruits (NF), fruit length (FL), fruit diameter (FD), pulp thickness (PT), soluble solids (SS), yield (Y), water use efficiency (WUE) and potassium use efficiency (KUE), besides an economic analysis using the net present value (NPV), internal rate of return (IRR) and payback...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita pepo L.; KCl; Fertigation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700643

Water magnetization and phosphorus transport parameters in the soil
Provedor de dados: 91
Autores: Generoso,Tarcila N.; Martinez,Mauro A.; Rocha,Genelício C.; Hamakawa,Paulo J.
ABSTRACT There are scientific studies describing changes in properties of the water when subjected to the action of a magnetic field, which may favor the availability of some nutrients in the soil solution. Some nutrients, although they are essential to the process of crop development, can be sources of pollution for watercourses and soil. The aim of this study was to evaluate the effect of water magnetization on transport parameters of the phosphate ion in a Red Latosol (RL) and in a Quartzarenic Neosol (QN). Saturated leaching columns were connected to bottles containing KH2PO4 solutions. In RL, there were significant differences in phosphorus (P) transport parameters, related to the retardation factor (R) and distribution coefficient (Kd). For the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnetized water; Ion movement; Nutrient availability; Fertigation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100009

Productivity and nutrition of fertigated açaí palms according to boron fertilization
Provedor de dados: 94
Autores: Lindolfo,Marcelo Morita; Matos,Gilson Sérgio Bastos de; Pereira,Wendel Valter da Silveira; Fernandes,Antonio Rodrigues.
Abstract  Due to the increasing national and international demand, the cultivation of açaí palm trees (Euterpe oleracea Mart.) has expanded to upland areas in Brazil. Most of these areas present low natural soil fertility, in which boron (B) is one of the most limiting nutrients. This study aimed to evaluate the productivity of fresh fruits of fertigated açaí trees submitted to doses of B. The study was carried out in Tomé-Açu, northeastern Pará, Brazil. The experimental design consisted of randomized blocks with four treatments: control and addition of 20, 40 and 60 g of B clump-1. After 17 months, bunches of fresh fruits were collected and the production per hectare was estimated. An economic analysis was carried out considering the costs of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euterpe oleracea Mart.; Doses of boron; Fertigation; Northeastern Pará.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000203001

VEGETATIVE DEVELOPMENT OF EUROPEAN PEAR WITH QUINCE AND DIFFERENT APPLICATION FORMS OF NUTRIENTS
Provedor de dados: 94
Autores: SILVEIRA,FABIANE NUNES; KRETZSCHMAR,AIKE ANNELIESE; MACHADO,BRUNO DALAZEN; CORRÊA,DAIANE; RUFATO,LEO.
ABSTRACT  The pear consumption in Brazil is significant and the country is dependent on the import of this fruit to meet the internal market. The aim of this study was to evaluate the vegetative growth of European pear trees grafted on quince with two application forms of nutrients. The study was conducted during the 2012/13, 2013/14 and 2014/15 harvests, in the experimental area of the Universidade do Estado de Santa Catarina / UDESC, in Lages. The cultivars used were Rocha, Santa Maria and Abbé Fétel. The quinces were ‘Adams’ and ‘EMA’. The application forms of the nutrients were conventional and fertigation. The experiment was carried out in a randomized block design and the arrangement of treatments was sub subdivided plots. The application form of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrus communis L.; Fertigation; Vigor; Cydonia oblonga L.; Sectional area of the stem; Solid fertilizer.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000300702

Quality in the pepper under different fertigation managements and levels of nitrogen and potassium
Provedor de dados: 124
Autores: Oliveira,Francisco de Assis de; Duarte,Sergio Nascimento; Medeiros,José Francismar de; Aroucha,Edna Maria Mendes; Dias,Nildo da Silva.
ABSTRACTThe rational use of nutrients is of fundamental importance for obtaining high productivity of high nutritional quality. This work was developed with the aim of evaluating the quality of pepper fruit grown under different fertigation managements and different levels of nitrogen and potassium. The experimental design was of randomised blocks in a 3 x 6 factorial scheme with four replications. The treatments resulted from the combination of three fertigation managements (M1-based on the rate of absorption; M2-monitoring the conductivity of the soil solution; M3-monitoring concentrations of N and K ions in the soil solution) with six levels of N and K (N0K0, N50K50, N100K100, N150K150, N200K200 and N300K300) as a percentage of the recommended dosage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quality Analysis; Capsicum annuum; Fertigation; Soil solution.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400764

Production of strawberry cultivars in closed hydroponic systems and coconut fibre substrate
Provedor de dados: 124
Autores: Miranda,Fabio Rodrigues de; Silva,Valsérgio Barros da; Santos,Francisco Sérgio Ribeiro dos; Rossetti,Adroaldo Guimarães; Silva,Christiana de Fatima Bruce da.
The objective of this work was to evaluate yield and average fruit weight of strawberry cultivars Albion, Camarosa, Festival and Oso Grande, in two closed hydroponic systems (gutters and grow bags), using coconut fibre as substrate. The experimental design was of randomised blocks, divided into strips, with five replications. The hydroponic systems did not differ significantly as to yield, with advantages, such as savings in water and fertilizer and reduced environmental impact, over open systems. The most productive cultivar was Festival, followed by Oso Grande, with average yields of 6.99 kg m-2 and 5.56 kg m-2 respectively. The cultivars with the greatest fruit weight were Oso Grande and Albion, having averages of 11.8 and 11.1 g respectively, with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragaria x ananassa; Hydroponics; Fertigation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400022

Characterization and selection method of Venturi injectors for pressurized irrigation
Provedor de dados: 124
Autores: Manzano,Juan; Palau,Carmen Virginia; Azevedo,Benito Moreira de; Bomfim,Guilherme Vieira do; Vasconcelos,Denise Vieira.
ABSTRACT Venturi-type chemigation injectors are widely used due to their advantages: they do not require electric power and are cheap to operate. However, they also generate considerable energy losses which affect the pressure in the system. The correct characterization of these systems requires pressures to be correctly set at the inlet, injector and outlet points in relation to main and injected solution flows. These analytical relationships, as described in the International Organization for Standardization’s standard ISO 15873:2002, can be obtained theoretically, although it is recommended that the manufacturer should determine the real behavior of the injector by operational tests. These relationships should also be provided graphically in the form of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemigation; Fertigation; Head losses; Nomography.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200201

USE OF PHOTOLYSIS (ARTIFICIAL RADIATION- UV) AS AN ADVANCED OXIDATION PROCESS (AOP) FOR POLISHING SWINE WASTEWATER TREATED IN ANAEROBIC REACTORS - DOI: 10.13083/1414-3984/reveng.v23n3p228-240
Provedor de dados: 107
Autores: Erlon Lopes Pereira; Universidade Federal de Viçosa; Claudio Milton Montenegro Campos; Universidade Federal de Lavras; Regina Batista Vilas Boas; Universidade Federal de Lavras; Cristine Serafini Neves; Universidade Federal de Lavras.
Among the numerous processes reported for sterilization of contaminated effluents, the advanced oxidative process (AOP) stands out for being effective in polishing degrading dissolved organic compounds. When comparing the various AOP(s), the UV photic process is advantageous since does not use catalysts and oxidizing reagents but only UV degradation, thus resulting in an effluent suitable for reuse and avoiding financial expenses related to chemical consumption. The present study sought after evaluating the efficiency of UV light, generated by special lamps in photo-reactors, degrading dissolved compounds and sterilizing microorganisms present in the effluent of anaerobic reactors treating hog farm effluents, aimed at improving the quality of the treated...
Tipo: Artigo Avaliado por Pares
Palavras-chave: Recursos Hidricos e Ambientais water reuse; Tertiary treatment; Fertigation; Photo-degradation; Biodegradability.
Ano: 2015
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/548

Iron sources for citrus rootstock development grown on pine bark/vermiculite mixed substrate
Provedor de dados: 63
Autores: Ferrarezi,Rhuanito Soranz; Bataglia,Ondino Cleante; Furlani,Pedro Roberto; Schammass,Eliana Aparecida.
For high technology seedling production systems, nutrition plays an important role, mainly the fertigation with iron chelates to prevent its deficiency. This study had the goal of searching for alternative iron sources with the same nutrient efficiency but lower cost in relation to nutrient solution total cost. An experiment was carried out in 56 cm³-conic-containers tilled with a pine bark/ vermiculite mixed substrate using Fe-DTPA, Fe-EDDHA, Fe-EDDHMA, Fe-EDTA, Fe-HEDTA, FeCl3, FeSO4, FeSO4+citric acid plus a control, and the rootstocks Swingle, Rangpur, Trifoliata and Cleopatra, in a randomized complete block design, with four replicates. Seedlings were evaluated for height, relative chlorophyll index, total and soluble iron leaf concentrations....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seedling production; Chelates; Fertigation; Economical analysis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500010

Calibration of cardy-ion meters to measure nutrient concentrations in soil solution an in plant sap
Provedor de dados: 63
Autores: Folegatti,Marcos Vinícius; Blanco,Flávio Favaro; Boaretto,Rodrigo Marcelli; Boaretto,Antônio Enedi.
Fertigation management requires rapid and accurate methods to determine nutrient concentrations in soil solution and in plant sap. This study was developed to evaluate the performance of cardy-ion meters (CIM) for the determinations of NO3-, K+ and Na+ concentrations in soil solution and tomato plant sap, for fertigation management purposes. Tomato was cultivated in a greenhouse with different levels of N, K and Na in the irrigation water. Soil solution was collected by suction at the 15 cm depth with porous ceramic cups and the concentrations of NO3-, K+ and Na+ were determined by CIM and also in the laboratory by standard methods. At the end of the cropping season, 50 leaf samples were also collected and concentrations of the nutrients in the petiole sap...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ion electrodes; Fertigation; Mineral nutrition; Soil solution extractor; Tomato.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100002

Irrigation frequency and substrate volume effects in the growth and yield of tomato plants under greenhouse conditions
Provedor de dados: 63
Autores: Pires,Regina Célia de Matos; Furlani,Pedro Roberto; Ribeiro,Rafael Vasconcelos; Bodine Junior,Décio; Sakai,Emílio; Lourenção,André Luiz; Torre Neto,André.
Tomato cropping (Solanum lycopersicum L.) under protected cultivation using substrates and drip fertigation has improved sustainable production systems especially fruit quality and plant health. However, little is known for tomato plants when considering the interaction between substrate volume and irrigation frequency. The aim of this study was to evaluate the effects of coconut (Cocos nucifera L.) fiber substrate volumes and drip irrigation frequencies on the vegetative growth and fruit yield of tomato plants under greenhouse conditions. The experimental design consisted of randomized blocks arranged in a 3 × 2 factorial with four replicates. Treatments consisted of three substrate volumes (5.0; 7.5 and 10.0 L per plant) and two irrigation frequencies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum L.; Fertigation; Gas exchange; Trickle irrigation; Water management.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400002

Nutrient solution salinity effect of greenhouse melon (Cucumis melon L. cv. Néctar)
Provedor de dados: 109
Autores: Da Silva Dias,Nildo; Dantas de Morais,Patricia Lígia; Abrantes Sarmento,José Darcio; Nogueira de Sousa Neto,Osvaldo; Palácio,Vilauba Sobreiro; de Freitas,Jair José Rabelo.
Abstract In Mossoró-RN, which is part of the semi-arid region of Brazil, a large part of the country’s melon production is concentrated, whose great potential is currently limited by water quality due to salt concentration. Therefore, the objective of this work was to investigate the use of saline nutritive solutions in the irrigation of greenhouse melon (Cucumis melo L. cv. Néctar) culture in coconut fiber. The experiment was carried out using a randomized block design with a 5 x 2 factorial arrangement, with four replications, where the treatments consisted of nutritive solutions with five salinity levels (1.25 - control, 1.43, 1.86; 2.96 and 4.86 dS m-1) and for two different times to evaluate fruit quality parameters (at harvest and after 12 days of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertigation; Post-harvest; Soilless cultivation; Storage; Substrate.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000400517

NUTRITIONAL CONTENT IN Eucalyptus benthamii MINI-STUMP LEAVES
Provedor de dados: 1
Autores: Brondani, Gilvano Ebling; Baccarin, Francisco José Benedini; Gonçalves, Antônio Natal; Almeida, Marcílio de.
The aim of this study was to evaluate the foliar nutrient content in Eucalyptus benthamii mini-stumps treated with different Zn and B concentrations during successive shoot collections. Shoots were collected from mini-stumps fertigated with nutrient solutions containing different concentrations of Zn and B (S1 – free of Zn and B; S2 – 0.5 mg L-1 Zn; S3 – 0.5 mg L-1 B; S4 – 0.5 mg L-1 Zn and B; S5 – 1.0 mg L-1 Zn and B; S6 – 2.0 mg L-1 Zn and B). Eight shoot collections from the clonal mini-garden were performed. For each shoot collection, the nutritional content of the leaf was determined (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn). The experiment was conducted using a randomized design with a factorial arrangement (8x6) and a split plot in time and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.04-0 nutritive solution; Fertigation; Mini-cutting technique; Clonal mini-garden Produção de Mudas nutritive solution; Fertigation; Mini-cutting technique; Clonal mini-garden.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16827

Transpiração do tomateiro cultivado em substrato e sua influência na fração lixiviada e na condutividade elétrica da solução nutritiva drenada - doi: 10.4025/actasciagron.v32i4.3246
Provedor de dados: 1
Autores: Steidle Neto, Antonio José; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, Minas Gerais; Zolnier, Sérgio; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, Minas Gerais; Marouelli, Waldir Aparecido; Centro Nacional de Pesquisa de Hortaliças, Empresa Brasileira de Pesquisa Agropecuária, Brasília, Distrito Federal.
O objetivo deste trabalho foi avaliar a influência da transpiração do tomateiro na fração lixiviada e na condutividade elétrica (CE) da solução nutritiva percolada no substrato de areia, em cultivo realizado sob condições de casa-de-vegetação. Foram utilizadas duas técnicas de fertirrigação, sendo uma denominada de sistema de controle convencional e outra, de sistema de controle computadorizado. No sistema de controle convencional, a solução nutritiva foi aplicada em intervalos de tempo fixos entre eventos de fertirrigação. No outro sistema, a aplicação ocorreu de acordo com estimativas de transpiração que foram realizadas pelo algoritmo de controle do sistema computadorizado. Em dias nublados, a CE da solução nutritiva drenada diminuiu em ambos os...
Palavras-chave: 5.03.02.00-0 Lycopersicon esculentum; Hidroponia; Cultivo sem solo; Fertirrigação; Casa-de-vegetação Engenharia de Água e Solo Lycopersicon esculentum; Hydroponics; Soilless cultivation; Fertigation; Greenhouse.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3246

Backwash process in a sand filter prototype used in irrigation
Provedor de dados: 111
Autores: Cândido de Souza, Álvaro Henrique; Seron, Cássio de Castro; Lorenzoni, Marcelo Zolin; de Deus, Fábio Ponciano; Rezende, Roberto.
Backwash process of sand filters requests specific surface velocity to reach the recommended filter bed height expansion, however the expansion of the filter bed height is very influenced by their characteristics. This work had as aim to evaluate the effect of different sand particle size, static filter bed layer and expansion of the filter bed height on a prototype of sand filter during backwash process. The tests were accomplished using a sand filter prototype that had structural similarity and shape as commercial equipments (24 cm of height and 12.7 cm of diameter). The treatments consisted from combinations of five separate sand particle sizes (0.15; 0.33; 0.51; 0.72 e 0.92 mm of medium diameter), five static filter bed layer (5; 7; 9; 11 and 13 cm)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water treatment; Irrigation; Fertigation; Irrigation water treatment; Superficial velocity; Sand particle sizes; Filter bed layer.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4910

Response of Potato to Drip and Gun Irrigation system
Provedor de dados: 111
Autores: Andersen, Mathias.
The objective of this study was to evaluate effects of different irrigation and N fertilization regimes by gun irrigation and drip-fertigation on potato production, and subsequently optimize the supply of water and N fertilizer to the growth condition of the specific season and minimize nitrate leaching without compromising profits. Four replicate plots of each treatment with varying predefined and model-based (Daisy and Aquacrop crop model) irrigation and N fertilization levels was used in the study. Two experiments were conducted. In experiment-I, treatments consisted of one drip-fertigation system (IdsNds) and two gun irrigation systems (GIdsN120 and GIaN120) to display the differences on growth, yield and water use efficiency of potato. All treatments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gun irrigation; Fertigation; Potato yield; Crop growth model; Denmark.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3154

Response of Potato to Drip and Gun Irrigation system
Provedor de dados: 111
Autores: Mathias Andersen.
The objective of this study was to evaluate effects of different irrigation and N fertilization regimes by gun irrigation and drip-fertigation on potato production, and subsequently optimize the supply of water and N fertilizer to the growth condition of the specific season and minimize nitrate leaching without compromising profits. Four replicate plots of each treatment with varying predefined and model-based (Daisy and Aquacrop crop model) irrigation and N fertilization levels was used in the study. Two experiments were conducted. In experiment-I, treatments consisted of one drip-fertigation system (IdsNds) and two gun irrigation systems (GIdsN120 and GIaN120) to display the differences on growth, yield and water use efficiency of potato. All treatments...
Palavras-chave: Gun irrigation; Fertigation; Potato yield; Crop growth model; Denmark.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3154

Impact of Nitrate and Ammonium ratio on Nutrition and Growth of two Epiphytic Orchids
Provedor de dados: 42
Autores: MANTOVANI,CIBELE; PRADO,RENATO M.; PIVETTA,KATHIA F.L.
Abstract Phalaenopsis and Dendrobium do not grow and flower well with 100% ammonium (NH4-N); and there are detailed studies on the effects of nitrate (NO3-N) and ammonium ratios on the flowering, but no information about accumulation of other nutrients and the effects of ammonium toxicity on orchids. For this reason, two experiments were carried out with orchids: Phalaenopsis ‘Golden Peoker’ and Dendrobium ‘Valentine’. Six months after acclimatization the plants were transplanted to individual plastic vessels and the treatments consisted of five ratios (%) of nitrate / ammonium (0/100, 25/75, 50/50, 75/25, 100/0). The sources of NO3-N and NH4-N were calcium nitrate and ammonium sulfate, respectively. After 12 months treatment, when the plants were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutritional status; Fertigation; Orchidaceae; Ammonium toxicity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703423

Copper supply and fruit yield of young Citrus trees: fertiliser sources and application methods
Provedor de dados: 53
Autores: Hippler,Franz Walter Rieger; Boaretto,Rodrigo Marcelli; Teixeira,Luiz Antonio Junqueira; Quaggio,José Antonio; Mattos-Jr,Dirceu de.
ABSTRACT This study aimed to evaluate the fertiliser sources and application methods of copper (Cu) in citrus trees during the first years of fruit production. Two experiments were set up in an orchard with 3-year-old sweet orange trees, which were applied with three sources of Cu (nitrate, sulfate or EDTA) either via fertigation (Experiment 1) or via foliar sprays (Experiment 2). Regardless of the fertiliser source, Cu application via fertigation was not efficacious to increase the micronutrient concentration in leaves and, consequently, did not affect fruit yield. Conversely, foliar application of Cu, either as nitrate or sulfate, increased this nutrient level in leaves but when applied as copper nitrate, visual phytotoxicity symptoms were verified in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micronutrient; Nutritional status; Fertigation; Foliar application; Citriculture.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200365

Nitrogen for growth of stock plants and production of strawberry runner tips
Provedor de dados: 53
Autores: Janisch,Djeimi Isabel; Andriolo,Jerônimo Luiz; Toso,Vinícius; Santos,Kamila Gabriele Ferreira dos; Souza,Jéssica Maronez de.
The objective of this research was to determine growth and dry matter partitioning among organs of strawberry stock plants under five Nitrogen concentrations in the nutrient solution and its effects on emission and growth of runner tips. The experiment was carried out under greenhouse conditions, from September 2010 to March 2011, in a soilless system with Oso Grande and Camino Real cultivars. Nitrogen concentrations of 5.12, 7.6, 10.12 (control), 12.62 and 15.12 mmol L-1 in the nutrient solution were studied in a 5x2 factorial randomised experimental design. All runner tips bearing at least one expanded leaf (patent requested) were collected weekly and counted during the growth period. The number of leaves, dry matter (DM) of leaves, crown and root,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragaria x ananassa; Hydroponics; Propagation; Fertigation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000300012

Tolerance to salinity of chicory plants grown in hydroponics
Provedor de dados: 65
Autores: Andriolo,Jerônimo Luiz; Madalóz,José Carlos Cazarotto; Godoi,Rodrigo dos Santos; Janisch,Djeimi Isabel; Barros,Cláudia Alessandra Peixoto de.
Chicory plants, cv. 'Amarelo' and 'Pão de Açúcar', were grown hydroponically under four NaCl concentrations in the nutrient solution to determine its tolerance to salinity. Sowing was made in rows placed 0.05m apart, on a 0.15m deep sand growing bed placed over fibber cement tiles. After emergence, plants were thinned to a plant density of 1,600plants m-2. A standard nutrient solution was used, with the main composition of, in mmol L-1, 13.5 NO3-; 2.5 NH4+; 1.5 H2PO4-; 1.5 SO4--; 7.5 Ca++; 10.0 K+ and 1.5 Mg++. The control (T1) was the standard nutrient solution, without addition of NaCl. Four salinity levels were compared, by adding 0.697 (T2), 1.627 (T3), 2.556 (T4) and 3.485 (T5)g L-1 of NaCl. The nutrient solution was delivered to plants four times a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cichorium intybus; Fertigation; Nutrient solution; Salt tolerance.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000400038

Nitrate and potassium concentration in fertigated soil cultivated with wine vines
Provedor de dados: 64
Autores: Silva,Alexsandro Oliveira da; Silva,Davi José; Bassoi,Luis Henrique.
ABSTRACT In the semiarid region of Brazil the use of irrigation systems for applying fertilizers in horticulture is the primary means for incorporating nutrients in the soil. However, this technique still requires its use in wine vines to be assessed. In view of this, this study aimed to assess nitrate and potassium concentrations in soil fertigated with nitrogen and potassium fertilizers in 3 wine grape growing cycles. A field experiment was conducted with 'Syrah' wine grapes, in Petrolina, Pernambuco, Brazil; it assessed five nitrogen doses (0, 15, 30, 60 and 120 kg ha-1) and five K2O doses (0, 15, 30, 60 and 120 kg ha-1) applied by drip irrigation system with two emitters per plant, with a flow rate of 4 L h-1. The experimental design used was the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera L; Soil solution; Fertigation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000300305