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| Registros recuperados: 29 | |
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| Melo,Suzana Pereira de; Monteiro,Francisco Antonio; Manfredini,Daniel. |
| One of the greatest problems for pasture establishment and maintenance are the extremely low concentrations of available phosphorus in soils. The objective of this study was to evaluate the influences on productive and physiologic attributes during Marandu palisadegrass (Brachiaria brizantha) establishment, following changes in phosphorus availability in the soil through the applications of phosphate and silicate. To achieve this, a fractionated factorial 5² design was used, with 13 combinations for silicon and phosphorus, respectively, in mg dm-3: 150 and 10; 150 and 170; 150 and 330; 225 and 90; 225 and 250; 300 and 10; 300 and 170; 300 and 330; 375 and 90; 375 and 250; 450 and 10; 450 and 170 and 450 and 330, distributed according to randomized blocks,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Leaf area; Phosphorus; Production; Silicon. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300010 |
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| Mauad,Munir; Crusciol,Carlos Alexandre Costa; Grassi Filho,Hélio; Corrêa,Juliano Corulli. |
| Silicon is not considered an essential element for plant development and growth, but its absorption brings several benefits to some crops, especially rice, by increasing cellular wall thickness, providing mechanical resistance to the penetration of fungi, improving the opening angle of leaves and making them more erect, decreasing self-shading and increasing resistance to lodging, especially under high nitrogen rates. To evaluate the effects of nitrogen and silicon fertilization on vegetative and yield components, plant height, and yield of rice cultivar IAC 202, an experiment was carried out combining three nitrogen rates (5, 75 and 150 mg N kg-1 soil) applied as urea, and four silicon rates (0, 200, 400 and 600 mg SiO2 kg-1 soil) applied as calcium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; Silicon; Nitrogen; Yield components. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400023 |
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| Tokura, Alessandra Mayumi; Uniderp; Furtini Neto, Antonio Eduardo; UFLA; Carneiro, Leandro Flávio; UFLA; Curi, Nilton; UFLA; Santos, José Zilton Lopes; UFLA; Alovisi, Alves Alexandre; SNP Consultoria. |
| O experimento foi conduzido com o objetivo de avaliar a influência da aplicação de silício (Si) e fósforo (P) sobre as formas orgânicas e inorgânicas do P em dois solos (Neossolo Quartzarênico órtico e Latossolo Vermelho distroférrico – LVdf), com textura e mineralogia distinta, antes e após o cultivo do arroz. O experimento foi realizado utilizando-se esquema fatorial, sendo quatro doses de P e três doses de Si. A fertilização fosfatada alterou as formas lábeis de P, enquanto as formas pouco lábeis apresentaram comportamento dependentes da textura e mineralogia. A aplicação do Si apresentou-se promissora em aumentar a disponibilidade de P para as plantas de arroz. |
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Palavras-chave: 5.01.00.00-9 Agronomia fertilização fosfatada e silicatada; Ânions; Fracionamento de P. phosphated fertilization; Silicon; Anions; P fractionation.. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1435 |
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| MARTINS,ADALVAN D.; MARTINS,JOÃO PAULO R.; BATISTA,LUCAS A.; DIAS,GABRIELEN M.G.; ALMEIDA,MIRIELLE O.; PASQUAL,MOACIR; SANTOS,HELOÍSA O. DOS. |
| Abstract The use of silicon in Billbergia zebrina cultivation in vitro is an alternative for optimizing micropropagation of this important ornamental plant species. The objective of the present study was to evaluate the growth and anatomical and physiological alterations in Billbergia zebrina (Herbert) Lindley plants as a function of different sources and concentrations of silicon during in vitro cultivation and acclimatization. The experimental design was completely randomized, with a double factorial arrangement and an additional control treatment (2 x 3 + 1). The first factor was relative to calcium silicate and sodium silicate added to the Murashige & Skoog culture medium; the second factor was related to its concentrations, 0.5, 1.0, and 2.0 mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliad; Micropropagation; Plant anatomy; Plant physiology; Silicon. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703449 |
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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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| Torres,William Gleidson Alves; Colen,Fernando; Pandey,Sugandha Dogra; Frazão,Leidivan Almeida; Sampaio,Regynaldo Arruda; Fernandes,Luiz Arnaldo. |
| ABSTRACT The soils of the Brazilian Savanna are generally acidic and have low availability of nutrients, so the use of alternative inputs to improve their fertility should be investigated. The objectives of this study were to evaluate the potential of biochars from rice husk (BHR) and from bovine manure (BCM) in increasing phosphorus availability and their effects on soil chemical properties and in common beans plants. The experiments were carried out in a completely randomized design, in a 4x2+3 factorial scheme with four replicates. The treatments were four biochar doses (1, 2, 3 and 4% m/v), two biochars (BRH and BCM) and three additional treatments (C1, no liming and no fertilization; C2, addition of Ca and Mg carbonate and NPK fertilizers and; C3,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertility; Pyrolysis; Phaseolus vulgaris L.; Silicon. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100232 |
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| Registros recuperados: 29 | |
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