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| Marques,Douglas José; Ferreira,Mozart Martins; Lobato,Allan Klynger da Silva; Freitas,Wellington Alves de; Carvalho,Jacinto de Assunção; Ferreira,Ewerton Dilelis; Broetto,Fernando. |
| ABSTRACT The aim of this study was to evaluate the potential of calcium silicate to mitigate the effects of water deficiency in maize plants yield. A completely randomized factorial design, consisting of five combinations of calcium silicate (0, 25, 50, 75, and 100%) and five different soil moisture levels (30, 70, 100, 130, and 160%), was adopted. The following parameters were evaluated: soil matric potential, xylem water potential, silicon concentration, leaf dry weight, and dry mass production. Matric potential monitoring confirmed that the irrigation depths employed resulted in different environments for maize plant development during the experiment. Confirming the hypothesis of the study, at the lower irrigation depths, the maize production has... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry matter; Irrigation; Silicon; Stress. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300275 |
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| Marques,Douglas José; Bianchini,Hudson C; Souza,Aloisio P de. |
| ABSTRACT Tropical floriculture has increased significantly in the last decade due to a growing worldwide market trend of consuming exotic, colorful, beautiful and durable flowers. Among the tropical floriculture products, ornamental gingers, species belonging to the families Zingiberaceae and Costaceae, have high potential for ornamental use, both for landscaping, for cut and potted flower and foliage. However, little information can be found in literature when it comes to crop fertilization, mainly concerning nitrogen fertilization, quite important to tropical soils which are poor in organic matter resource. Thus, this study aimed to evaluate application of nitrogen doses, using fertigation for growing ornamental ginger under protected cultivation. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zingiber spectabile; SPAD index; Tropical floriculture. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200146 |
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| Oliveira,Camila S de; Maciel,Gabriel M; Fraga Júnior,Eusímio F; Peixoto,Joicy Vitória M; Assunção,Vitor B; Marques,Douglas José. |
| ABSTRACT The selection of genotypes with agronomic potential associated with drought tolerance is considered of high complexity. An alternative could be the use of selection indexes that can evaluate multiple characteristics simultaneously. This study aimed to select tomato genotypes with agronomic potential and drought tolerance by selection indexes. The experiment was conducted in a randomized block design with three replications. Ten treatments were evaluated: seven genotypes F2RC3, donor genitor (Solanum pennellii), recurrent genitor (UFU-040), and cv. Santa Clara. The irrigation was suspended until the substrate reached a matric potential of ≤-25 kPa for water stress simulation during the tomato cycle at 45, 60, 80 and 100 days after sowing. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum lycopersicum; Abiotic stress; Selection gains; Backcross; Water deficit. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100102 |
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| Landgraf,Paulo Roberto Corrêa; Marques,Douglas José; Mantovani,José Ricardo; Silva,Adriano Bortolotti da; Santos,Breno Régis; Paiva,Patrícia Duarte de Oliveira; Silva,Rodrigo Sérgio da. |
| Resumo: O objetivo deste trabalho foi avaliar o efeito do cultivo de plantas de copo-de-leite (Zantedeschia aethiopica) em sistema hidropônico, no crescimento vegetativo, no teor de nutrientes na parte aérea e nas trocas gasosas. Utilizou-se o delineamento experimental inteiramente casualizado, em arranjo fatorial triplo (2x2x2), com oito tratamentos, três repetições e oito plantas por parcela. Os tratamentos consistiram de duas dimensões de espuma fenólica (2,5x2,5x2,5 e 5,0x5,0x3,8 cm, expressas em altura x comprimento x largura), duas soluções nutritivas e dois perfis hidropônicos (100 e 150 mm). As plantas de copo-de-leite foram cultivadas em sistema hidropônico fluxo laminar de nutriente (NFT) e apresentaram teores de nutrientes na parte aérea, na... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zantedeschia aethiopica; Floricultura; Fotossíntese; Nutrição mineral.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015001101027 |
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| Marques,Douglas José; Broetto,Fernando; Ferreira,Mozart Martins; Lobato,Allan Klynger da Silva; Ávila,Fabricio William de; Pereira,Fabricio José. |
| Potassium participates in the essential processes in plant physiology, however, the effects of K sources on plant metabolism have been little studied. Also, in certain cases, K sources and concentrations may cause undesirable effects, e.g., soil salinization. The objective was to evaluate the effect of K sources and levels on the enzyme activity of the antioxidant system and protein content in eggplant (Solanum melongena L.) leaves and to determine the most suitable K sources for these physiological characteristics. The experiment was conducted in randomized blocks, in a 2 × 4 factorial design, consisting of two K sources (KCl and K2SO4) and rates (250, 500, 750, and 1000 kg ha-1 K2O), with four replications. The following variables were evaluated: plant... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Solanum melongena L.; Potassium; Superoxide dismutase; Catalase; Protein. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600018 |
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| Miguel Filho,Gentil Luiz; Marques,Douglas José; Souza,Paulo Sergio de; Aparecido,Lucas Eduardo de Oliveira; Cabral Neto,Luciano Dias. |
| Abstract The expansion of the Brazilian wine border, combined with the development of new cultivars adapted to different regions, highlight the need for more information on irrigation handling for new cultivars in protected cultivation. Therefore, this study aimed to evaluate grapevine cultivars submitted to different percentages of water replacement in the soil in conditions of the Southern region of Minas Gerais with the use of irrigation. The experiment was installed and developed from 2014 to 2016. The experimental design used was random blocks, with five replicates and the treatments were disposed in subdivided plots, with three replacement percentages (30, 50 and 100 % of necessary water replacement for this type of soil) and in the subplots four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis labrusca L.; Table grape; Irrigation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000406001 |
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| Marques,Douglas José; Siqueira,José Andres Carreño; Bianchini,Hudson Carvalho; Alves,Vinicius Mendes. |
| Abstract The objective of this research was to evaluate the production of passion fruit (Passiflora edulis Sims) cultivars in different nutrient solutions, using commercial Bioplant® substrate in slabs system in protected cultivation. A randomized complete block design in a factorial scheme was used with 2 passion fruit cultivars (Araguari and Yellow Master) x 4 nutrient solutions (solution 1, solution 2, solution 3 and solution 4), each plot consisting of 6 plants with 6 replications. Electrical conductivity evaluations in the slabs drained solution started at 15 days after seedling transplantation and the nutrient contents were quantified at the end of the research. In passion fruit, ether extract, crude fiber and crude protein were evaluated. Fruit... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutrition solutions; Fruit farming; Slabs. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000503002 |
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