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| Registros recuperados: 40 | |
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| Szareski,Vinícius Jardel; Carvalho,Ivan Ricardo; Kehl,Kassiana; Levien,Alexandre Moscarelli; Nardino,Maicon; Dellagostin,Simone Morgan; Demari,Gustavo Henrique; Lautenchleger,Francine; Villela,Francisco Amaral; Pedó,Tiago; Souza,Velci Queiróz de; Aumonde,Tiago Zanatta. |
| Abstract: The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Accelerated aging; AMMI; Electrical conductivity; Mixed models; Seed quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600727 |
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| Lorin,Higor E. F.; Costa,Mônica S. S. de M.; Chiarelotto,Maico; Santos,Francielly T. dos; Costa,Luiz A. de M.. |
| ABSTRACT The recovery of waste from the broiler production chain (BPC) is consistent with the principles of a circular economy. Besides turning waste into organic compost, its use as substrate for the production of vegetable seedlings further increases its economic value. However, it is necessary to adapt its characteristics to enable its use as substrate. To this end, the addition of boiler remnant charcoal wastes (BCW), another type of waste generated in the BPC, to the organic compost resulting from the composting of BPC waste with different bulking agents (BAs) was studied. The addition of BCW to agro-industrial compost reduced the electrical conductivity (EC) of substrates. Multiple linear regression showed that, of the 13 variables (physical,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Circular economy; Easiness of removal of clod from tray; Seedling quality index; Salinity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600753 |
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| Megda,Michele Xavier Vieira; Mariano,Eduardo; Leite,José Marcos; Megda,Marcio Mahmoud; Trivelin,Paulo Cesar Ocheuze. |
| Abstract: The objective of this work was to evaluate the effect of the application of ammonium chloride as a nitrogen source for sugarcane (Saccharum sp.) on the development of the crop’s shoot and roots during two consecutive cycles. The experiment was conducted on a Typic Hapludox in the first and second sugarcane ratoons. The treatments consisted of four N doses (50, 100, 150, and 200 kg ha-1) applied as ammonium chloride (NH4Cl), besides a control, without the application of N. The increase in the NH4Cl dose increased in up to three times soil electrical conductivity in the layer of 0.0-0.2 m, with a consequent increase in the concentration of chlorine in leaves. In the second cycle, the contents of chlorine increased in 1,900 mg kg-1 in the leaf with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Electrical conductivity; Nitrogen fertilization; Root system; Stalk productivity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102100 |
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| Matthews,S.. |
| In comparisons of six seed lots of different F1 hybrid cultivars of cauliflower with similarly high laboratory germinations (above 90%) separation in germination was achieved after controlled deterioration (C.D.) at 24% moisture content (m.c.) and 45 0C for 24 hours. This measure of vigour was related to the position of the lots on the seed survival curve and was highly predictive of the longevity of the lots when stored at 15% m.c. and 20 0C for 12 and 16 weeks. When each seed lot was deteriorated at 24% m.c. for increasing times (from 0 to 36 hours) a reduction in the subsequent percentage germination was seen, which, using probit transformed percentages, was significantly and linearly related to the leakage of electrolytes into seed soak water over 24... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cauliflower; Controlled deterioration; Leakage; Electrical conductivity; Storage. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000500011 |
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| Fraga,Thiago Isquierdo; Carmona,Felipe de Campos; Anghinoni,Ibanor; Marcolin,Elio. |
| In the State of Rio Grande do Sul, Brazil, flooded rice fields using Patos Lagoon as the source of water for irrigation are subject to be damaged by salinity, since this source is bound to the sea on its southern end. The sensitivity of rice is variable during plant development, being higher in the seedling and reproductive periods. However, there is not enough information about the behavior of plants under salt stress during the course of its development, especially in the vegetative stage. This study evaluated the effect of different levels of salinity of irrigation water on the salinity of soil solution over time and on some plant attributes, during the vegetative stage of rice. The study was conducted in a greenhouse, where seeds of the variety IRGA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Tillering; Vegetative growth; Oryza sativa L. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400005 |
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| Carmona,Felipe de Campos; Anghinoni,Ibanor; Holzschuh,Marquel Jonas; Andrighetti,Marcelo Hoerbe. |
| Salinity levels in soils of the Outer Coastal Plain of Rio Grande do Sul, Brazil, can be high, due to excess of Na in the irrigation water, evapotranspiration and soil development from marine sediments. The cultivation of irrigated rice could be an alternative, since ion uptake as well as leaching by the establishment of a water layer could mitigate the effects of soil salinity. This study aimed to evaluate the dynamics of basic cations in the solution of Albaqualf soils with different salinity levels growing irrigated rice. The plow layer contained exchangeable Na percentages (ESP) of 5.6, 9.0, 21.2 and 32.7 %. The plant stand, dry matter, Na, K and Ca + Mg uptake at full flowering and grain yield were evaluated. The levels of Na, K, Ca + Mg and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exchangeable sodium percentage; Potassium; Calcium; Magnesium; Electrical conductivity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600009 |
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| Heck,R. J.; Tiessen,H.; Santos,M. C.; Salcedo,I. H.; Alves,R. J. T.. |
| This study compares the chemical composition of the solution and exchange complex of soil in a 3-year-old irrigated vineyard (Vitis vinifera L., Red Globe cultivar) with that of adjacent clearing in the native hyperxerophyllic 'caatinga' vegetation. The soils are classified as Plinthic Eutrophic Red-Yellow Argisol; according to Soil Taxonomy they are isohyperthermic Plinthustalfs. Detailed physiographic characterization revealed an impermeable gravel and cobble covering the crystalline rocks; the relief of this layer was more undulating than the level surface. Significant higher concentrations of extractable Na, K, Mg and Ca were observed within the vineyard. Lower soil acidity, higher Ca/Mg ratios, as well as lower sodium adsorption and Na/K ratios... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vineyard; Physiography; Moisture content; Exchangeable cations; Electrical conductivity; Soluble cations; Sodicity; Acidity. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000100020 |
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| Novella,Manuel Benito; Andriolo,Jerônimo Luiz; Bisognin,Dilson Antônio; Cogo,Clarissa Melo; Bandinelli,Maurício Guerra. |
| The effect of the nutrient solution concentration on potato plant growth and minituber yield were determined in a sand closed hydroponic system. Minitubers and micropropagated plantlets of the cv. 'Macaca' were used. Treatments were five nutrient solution concentrations at electrical conductivities (EC) of 1.0 (T1), 2.2 (T2), 3.4 (T3), 4.7 (T4) and 5.8dS m-1 (T5). The split plot randomised experimental design was used with three replications. Plants from minitubers produced higher fresh and mean weight of minitubers, shoot dry mass and leaf area index than the micropropagated ones. However, higher dry mass of minitubers was found with micropropagated plantlets compared to minitubers. The concentration of the nutrient solution did not affect minituber... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Plantlets; Plant propagation; Electrical conductivity. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000600006 |
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| Hernández Flores, Benjamín. |
| México ocupa el onceavo lugar a nivel mundial como productor de jitomate (Lycopersicon esculentum Mill.), con una producción de 2.15 millones de toneladas (1.7% del total mundial), sin embargo es el segundo comercializador del producto en el mundo con aproximadamente 895,126 toneladas métricas, solo después de España que exporta 1,023,028 toneladas métricas. En México, el jitomate es una de las hortalizas de mayor importancia por el valor de su producción y superficie cultivada. Según cifras del SIAP-SAGARPA la superficie total cosechada durante el año de 2004 fue de 71,502.3 hectáreas y una producción total de 2.3 millones de toneladas, con un valor de la producción de 14,375.6 millones de pesos. En México los principales productores son: Sinaloa, Baja... |
| Tipo: Tesis |
Palavras-chave: M. incognita; M. arenaria; M. javanica; M. hapla; Textura de suelos; Materia orgánica; PH; Conductividad eléctrica; Meloidogyne spp.; Distribución espacial; Maestría; Fitopatología; Soil texture; Organic matter; Electrical conductivity; Spatial distribution. |
| Ano: 2007 |
URL: http://hdl.handle.net/10521/1584 |
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| Carmo,Davi Lopes do; Silva,Carlos Alberto; Lima,José Maria de; Pinheiro,Gabriela Lúcia. |
| ABSTRACT Soil solution samplers may have the same working principle, but they differ in relation to chemical and physical characteristics, cost and handling, and these aspects exert influence on the chemical composition of the soil solution obtained. This study was carried out to evaluate, over time, the chemical composition of solutions extracted by Suolo Acqua, with the hydrophilic membrane (HM) as a standard, using soils with contrasting characteristics, and to determine the relationship between electrical conductivity (EC) and concentration of ions and pH of soil solution samples. This study was carried out under laboratory conditions, using three soils samples with different clay and organic matter (OM) contents. Soil solution contents of F−, Cl−,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Water soluble carbon; Soil liquid phase; Soil solution extraction methods. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100405 |
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| Trezzi,M.M; Vidal,R.A; Kruse,N.D; Gustman,M.S; Xavier,E; Rosin,D; Dedordi,G.F. |
| The action of herbicides that affect the integrity of cell membranes and cause leakage, like PPO-inhibitors, can be detected by measuring the electric conductivity (EC) of a solution in which the plant tissue target is incubated in the presence of herbicide. The objectives of this work were to confirm PPO resistance in a new Euphorbia heterophylla (EPHHL) biotype, and to compare the electrolyte leakage from R and S to PPO-inhibitors biotypes, using two different methods of incubation in a solution containing herbicides. One experiment was carried in greenhouse and three in laboratory, with a completely randomized design. In the greenhouse experiment, four biotypes of EPHHL were sprayed with seven rates of fomesafen to confirm resistance in suspected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell disruption; Electrical conductivity; Herbicide absorption; Resistance mechanism; Wild poinsettia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300020 |
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| Silva,Rodrigo J. da; Ferreira Junior,José M.; Silva,Flavia A.; Santos,Antonio C. M. dos; Lima,Saulo de O.; Silva,Rubens R. da. |
| ABSTRACT The development and survival of Eucalyptus urograndis plants may be influenced by products based on humic fractions of the organic matter, purified MAP and soil conditioners, such as hydrogel. Thus, the present study aimed to evaluate the effect of the commercial products Fertiactyl®, based on humic substances, purified MAP and hydrogel on the post-planting development and survival of Eucalyptus urograndis. The experiment was conducted in a randomized block design, with 25 treatments and four replicates, each of which consisted of 6 plants. The immersion of the tubes in solution with doses of Fertiactyl® and purified MAP promoted the increase in the development and survival of the plants. In the preparation of the hydrogel, the use of solution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Electrical conductivity; Hydration; Immersion. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700625 |
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| Matias,Janete R.; Torres,Salvador B.; Leal,Caio C. P.; Leite,Moadir de S.; Carvalho,Sara M. C.. |
| ABSTRACT Sunflower is a species with multiple potentialities and its yield can be affected by the presence of soluble salts in the soil, which is common in arid, semi-arid and irrigated regions. The objective of this study was to evaluate the effect of hydropriming as inducer of salinity tolerance in seeds and seedlings of sunflower, hybrid MG305CP. The germination tests were set with four replicates of 50 seeds per treatment, maintained in germinator at 30 ºC for ten days. To simulate salinity, sodium chloride diluted in distilled water was used at electrical conductivities of 0 (control), 4, 8, 12 and 16 dS m-1. On the tenth day, the number of normal seedlings was counted and the length and dry matter of shoots and roots were determined. Seedling fresh... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annuus; Asteraceae; Physiological conditioning; Abiotic stress; Electrical conductivity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400255 |
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| Mantovani,José R.; Bernardes,Jéssica da S.; Landgraf,Paulo R. C.. |
| ABSTRACT In biodiesel production, vegetable press cake is obtained as waste, and a suitable destination for jatropha press cake would be the use in agriculture as organic fertilizer. This study aimed to evaluate the effect of jatropha press cake on soil fertility attributes and on lettuce production and accumulation of nutrients in the shoots. The experiment was conducted in pots in a greenhouse, in a randomized block design with eight treatments and five replicates. The treatments consisted of doses of jatropha press cake equivalent to 0, 0.5, 1.0, 2.0, 4.0, 8.0, 16.0 and 32.0 t ha-1. Portions of 5.5 dm3 of soil received limestone, phosphate fertilizer and the doses of jatropha press cake, and remained incubated for 30 days. After incubation, soil samples... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic waste; Organic fertilization; Nutrient; Electrical conductivity. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201089 |
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| Registros recuperados: 40 | |
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