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| Zamora,Valentin Ruben O; Silva,Manasses M da; Silva,Geronimo F da; Santos Júnior,José Amilton; Menezes,Dimas; Menezes,Sirleide Maria de. |
| ABSTRACT This study was installed to evaluate the effect of pulse drip irrigation under different water depth levels (fertigation) in the main water relations of coriander crop (Coriandrum sativum). The experiment was installed under protected environment conditions, at UFRPE, Recife, Brazil. The experimental design was randomized blocks in a 2x5 factorial scheme, with three replications. Treatments consisted of two application types (continuous and pulsed irrigation), and five water depths with replacement of 40, 60, 80, 100 and 120% of crop evapotranspiration (ETc). Water demand was estimated through water balance using a drainage lysimetry. Six irrigation pulses were defined with a 60-minute-rest interval between two successive applications. Plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum; Intermittent irrigation; Water deficit; Dripping irrigation system. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100022 |
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| Azevedo,Wagner Santos Lima; Santos Júnior,José Amilton; Araújo,Alexandre Eduardo de; Perez-Marin,Aldrin Martin; Medeiros,Salomão de Sousa. |
| ABSTRACTThe reduction on crop production observed in semiarid conditions is closely linked to soils degradation in their physical, microbiological and fertility aspects. Based on this premise, the effects of different types of organic fertilizers associated to the use of mulching in the production of cowpea grown in Paraíba state, Brazil, under semiarid conditions, was studied. The research was conducted under field conditions in the municipality of Casserengue, PB, from April to July 2010. The statistical design in randomized block design with five treatments and five replicates was used, totaling 25 experimental units. Treatments consisted on application of cattle manure or biofertilizer on presence or absence of mulch, plus a control treatment, without... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian semiarid; Cattle manure; Biofertilizer. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400689 |
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| Santos Júnior,José Amilton; Gheyi,Hans Raj; Pérez-Marin,Aldrin Martin; Dias,Nildo da Silva; Guedes Filho,Doroteu Honório. |
| Flower production in semi-hydroponic systems is a profitable alternative for generating income in communities of small farmers in the semiarid region of Brazil. This is because such a system of cultivation relates aspects of the climate, water and soil of the region, favoring the production of crops. In this work, the use of wastewater as a source of water and nutrients was studied, renewed at four time intervals (daily and every two, three and four days), and of three growth substrates (coconut fiber, sand and sugarcane bagasse), in the production and post-harvest period of sunflowers. These treatments were distributed in a completely randomised design and analysed in a 4 x 3 factorial with three replications, giving a total of 36 experimental units. It... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annus L.; Hydroponic system; Water reuse. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300006 |
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| Soares,Hammady Ramalho e; Santos Júnior,José Amilton; Silva,Ênio Farias de França e; Rolim,Mário Monteiro; Silva,Gerônimo Ferreira da. |
| ABSTRACT Rationalization of brackish water management in hydroponic crops is one of the ways to expand and manage water supply in shortage areas. Thus, this work was carried out to evaluate the water and physiological relationships of Iceberg lettuce (cv. Tainá) in plants exposed to strategies of replacement of the evapotranspired volume of saline nutrient solutions. Two experiments were conducted in NFT hydroponic system, in which increasing levels of water salinity (0.2, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m-1) were used to prepare the nutrient solutions. In the first experiment, the evapotranspired volume was replaced with the respective brackish water and, in the second one, with public-supply water (0.2 dS m-1). Both experiments were set up in a randomized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Water management; Salinity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200216 |
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| Santos Júnior,José Amilton; Gheyi,Hans Raj; Guedes Filho,Doroteu Honório; Dias,Nildo da Silva; Soares,Frederico Antônio Loureiro. |
| Os sistemas hidropônicos tem se constituído em uma das alternativas para equacionar os fatores naturais adversos à produção agropecuária presentes nas regiões semiáridas do Brasil, como solos rasos, pedregosos e pouco férteis, além da escassez de recursos hídricos em quantidade e qualidade (teores elevados de sais). Este trabalho buscou estudar os componentes de produção do girassol (variedade EMBRAPA 122/V-2000) destinados à obtenção de aquênios e forragem (fitomassa), cultivado em sistema hidropônico, utilizando a fibra de coco como substrato e irrigado com água salobra de diferentes salinidades. O delineamento experimental utilizado foi o inteiramente casualizado, em esquema fatorial 5 x 2 com três repetições, de modo que foram estudados cinco níveis de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquênios; Forragem; Hidroponia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000400004 |
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| Santos Júnior,José Amilton; Gheyi,Hans Raj; Dias,Nildo da Silva; Araujo,Danila Lima; Guedes Filho,Doroteu Honório. |
| A utilização da água residuária no preparo da solução nutritiva em cultivos semi-hidropônicos, tanto incrementa a oferta de água em regiões de escassez quanto recicla os nutrientes nela contidos disponibilizando-os às plantas. Considerando estes aspectos, buscou-se com o presente trabalho, analisar o crescimento e desenvolvimento de plantas de girassol para fins ornamentais, cultivadas em sistema semi-hidropônico, utilizando água residuária no preparo de soluções nutritivas com concentrações nutricionais crescentes (55; 70; 85 e 100%) à base de NPK, e diferentes substratos de cultivo (fibra de coco, areia lavada e bagaço de cana de açúcar). Os tratamentos foram distribuídos em um delineamento inteiramente casualizado, analisado em esquema fatorial 4x3, com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annuus L.; Qualidade de água; Nutrição de Plantas. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400007 |
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| Martins,Juliana Bezerra; Santos Júnior,José Amilton; Silva Júnior,Fernando José da; Silva,Gerônimo Ferreira da; Medeiros,Salomão de Sousa. |
| ABSTRACT Brackish waters may vary in their chemical compositions, interfering with different plant responses to stress; therefore, the present study aimed to evaluate the production components of parsley plants subjected to levels of electrical conductivity in nutrient solutions with an initial ECns of 1.58 dS m-1, which was solubilized in water with the following water electrical conductivity configurations (ECw): 0.12 (control), 1.12, 2.12, 3.12, 4.12 and 5.12 dS m-1, resulting in six isosmotic levels (ECns = 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m-1) in an interaction with four types of salt: NaCl, CaCl2, MgCl2 and KCl. The experimental design was completely randomized in a factorial scheme with five replicates. Two strategies were used to restore the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Petroselinum crispum; Salinity; Cationic nature; Hydroponics.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100200 |
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| Souza,Carlos Donato da Silva; Silva,Geronimo Ferreira da; Menezes,Sirleide Maria de; Morais,José Edson Florentino de; Santos Júnior,José Amilton; Silva,Alexsandro Oliveira da. |
| ABSTRACT Cultivation using brackish waters can result in nutritional and metabolic imbalances in several plant species, consequently reducing the production of dry matter (DM) and accumulation of toxic ions (Na+ and/or Cl-) in plants. We evaluated the DM production, and nutrient and inorganic solute (Na+ and Cl-) content in green onion plants (cv. Todo Ano Evergreen - Nebuka) under different levels of nutrient solution salinity in combination with circulation frequencies of this solution. Two experiments were conducted in a hydroponic system, using a completely randomized design, in a 6 × 2 factorial scheme, with five replicates: six levels of nutrient solution salinity (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m-1) and two solution circulation frequencies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium fistulosum L.; Nutrient solution; Salinity; Mineral nutrition. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100227 |
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