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Registros recuperados: 17
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Atributos químicos do solo, crescimento radicular e produtividade do arroz de acordo com a aplicação de escórias. Repositório Alice
CARVALHO-PUPATTO, J.G.; BÜLL, L.T.; CRUSCIOL, C.A.C..
Resíduos industriais são fontes alternativas de nutrientes para as plantas e sua utilização decorre da necessidade de diminuir o acúmulo dos resíduos nos centros de produção. O objetivo deste trabalho foi avaliar o efeito de escórias de siderurgia nos atributos químicos do solo, no desenvolvimento e na produtividade de grãos do arroz de terras altas irrigado por aspersão. O delineamento experimental foi em blocos casualizados, com três tratamentos constituídos de duas escórias, alto-forno (196 g kg-1 de Si) e aciaria (56 g kg-1 de Si), e a testemunha sem aplicação, com oito repetições. As escórias podem ser usadas como corretivo de acidez do solo e como fonte de silício. As alterações nos atributos químicos do solo estão relacionadas com a composição...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Oryza sativa; Resíduo industrial; Comprimento radicular; Acidez; Silício; Industrial residue; Root length; Acidity; Silicon.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/113134
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Avaliação de nove linhagens de milho em cruzamentos dialélicos quanto à tolerância ao alumínio. Repositório Alice
CANÇADO, G. M. de A; PARENTONI, S. N.; BORÉM, A.; LOPES, M. A..
Avaliaram-se nove linhagens endogâmicas de milho e seus cruzamentos quanto à tolerância ao alumínio (Al), em um dialelo incompleto. Foram utilizados os índices fenotípicos de comprimento relativo de raiz seminal (CRRS), comprimento líquido de raiz seminal (CLRS) e coloração por hematoxilina, determinados após sete dias de crescimento em solução nutritiva contendo 222 mmoles L-1 de Al. Os resultados dos cruzamentos dialélicos demonstraram que os efeitos aditivos foram mais importantes que os efeitos não-aditivos para os três índices avaliados. As linhagens L13, L724, L723 e L16 seriam as mais indicadas para a obtenção de híbridos visando tolerância ao Al, por apresentarem os melhores valores de capacidade geral de combinação e por participarem dos...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Progênie; Solução nutritiva; Pigmentos; Comprimento da raiz; Melhoramento vegetal; Progeny; Nutrient solution; Pigments; Root length; Plant breeding.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/107355
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Caracteristicas indicativas de sensibilidade ao aluminio em arroz: I. Crescimento em solucao nutritiva. Repositório Alice
VICENTE, F. M. P.; ROSSIELLO, R. O. P.; PEREIRA, M. B..
Neste experimento avaliou-se a sensibilidade de varias caracteristicas de plantas de arroz (Oryza sativa L.) (area foliar, AF; area radicular, AR; comprimento maximo radicular, CR; comprimento maximo foliar, CF;numero de raizes, NR; peso de massa seca radicular, PR; peso de massa seca da parte aerea, PA), a doses de Al(0,10,20 e 30 mgL) em solucao nutritiva, visando estabelecer uma ordem sequencial de resposta. Os valores das caracteristicas foram representados pela media de 20 genotipos. Plantulas de 20 dias foram transferidas para solucao nutritiva de pH 4,0 e arranjadas de forma inteiramente casualizada com quatro repeticoes. Os resultados foram expressos em termos de rendimento relativo (RR%). Foram ajustadas equacoes de regressao, segundo um modelo...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Oryza sativa; Arroz; Rendimento relativo; Area radicular; Comprimento radicular; Relative yield; Root area; Leaf area; Root length.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/87089
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Evaluation of morphological characteristics in Venezuelan maize (Zea mays L.) genotypes under drought stress Scientia Agricola
Camacho,R.G.; Caraballo,D.F..
A greenhouse experiment was carried out to evaluate the responses among 10 maize (Zea mays L.) genotypes under drought stress. Seeds were planted in washed sand in plastic pots. The research was established in a completely random design with ten treatments and three replicate pots. The plants were harvested four weeks after sowning, and leaf area per plant (LA), root volume (RV), longest root length (LRL), plant height (PH), fresh (RFW) and dry weight (ROW) of roots, shoot dry weight (SOW), RDW/SDW ratio, and total dry matter production (TDM) were determined. Significant varietal differences for all characters were found, except for LRL. The data obtained allowed to identify Cargill-163 as a poor genotype at low water supply. Danac-3006, FM-6,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Leaf area; Root volume; Root length; Plant height; Root weight; Shoot weight; Total dry matter; Drought resistance.
Ano: 1994 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000300012
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Genetic parameter and correlation estimates of processing traits in half-sib progenies of tropical-adapted carrot germplasm Horticultura Brasileira
Vieira,Jairo V; Silva,Giovani Olegario da; Boiteux,Leonardo S.
The estimate of the genetic parameters associated with processing (fresh-cut) traits, including root length (RL), is crucial for carrot breeding programs in tropical areas. The cultivar Alvorada is an important germplasm due to its resistance to nematodes, leaf blight, heat-tolerance, and high carotenoid content. Seventy-four 'Alvorada' half-sib progenies were evaluated during the summer of 2005 in the Federal District, Brazil, in a randomized complete block design with three replications. Thirteen competitive plants in each block were randomly selected and evaluated and/or classified for RL and for number of leaves (NL), leaf length (LL), root tip type (RT), root mass (RW), crown shape (CS), root diameter (RD), and xylem diameter (XD). The Pearson's...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Daucus carota; Heritability; Genetic correlation; Path analysis; Root length.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000100002
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Public-domain software for root image analysis Rev. Bras. Ciênc. Solo
Costa,Mirian Cristina Gomes; Cunha,Isabela Maria de Lima; Jorge,Lúcio André de Castro; Araújo,Isabel Cristina da Silva.
In the search for high efficiency in root studies, computational systems have been developed to analyze digital images. ImageJ and Safira are public-domain systems that may be used for image analysis of washed roots. However, differences in root properties measured using ImageJ and Safira are supposed. This study compared values of root length and surface area obtained with public-domain systems with values obtained by a reference method. Root samples were collected in a banana plantation in an area of a shallower Typic Carbonatic Haplic Cambisol (CXk), and an area of a deeper Typic Haplic Ta Eutrophic Cambisol (CXve), at six depths in five replications. Root images were digitized and the systems ImageJ and Safira used to determine root length and surface...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Root length; Root surface area; Image processing; Root system.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500001
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Root growth and carbohydrate partitioning in cotton subjected to shading in the initial phase Ciência Rural
Echer,Fábio Rafael; Zanfolin,Priscila Roberta Leme; Moreira,Ana Carolina Monico; Santos,Ana Cláudia Pacheco; Gorni,Pedro Henrique.
ABSTRACT: Cotton cultivation in Brazil tends to occur mostly in the rainy season, and at the time of developing the crop there are often prolonged periods of low solar radiation. The objective of this work was to evaluate the root development of cotton cultivars subjected to shading in the initial phase. The experiment was carried out in a greenhouse, using rhizotrons. The experimental design was a 2x2 factorial in randomized blocks with five replications. The treatments were composed of cotton cultivars TMG 1WS (early) and TMG 8WS (late) and luminosity conditions: non-shaded and shaded (50% reduction of luminosity). There were no interactions between the factors “shading” and “cultivars” for any parameter evaluated. Shading reduced total and lateral root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Root length; Dry weight; Radiation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100200
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Root system characteristics of Marandu palisadegrass supplied with nitrogen and magnesium rates R. Bras. Zootec.
Garcez,Tiago Barreto; Megda,Marcio Mahmoud; Artur,Adriana Guirado; Monteiro,Francisco Antonio.
The development of root system of forage grasses is influenced by the supply of mineral nutrients. The experiment was carried out in a greenhouse in Piracicaba, São Paulo State, with the objective of evaluating the effect of nitrogen and magnesium rates on dry mass yield, total length and surface, specific length and surface, and concentrations of nitrogen, magnesium, calcium and potassium in the root system of Brachiaria brizantha Stapf. cv. Marandu. It was studied five rates of nitrogen (2, 9, 16, 23 and 30 mmol L-1) and five rates of magnesium (0.05, 0.70, 1.35, 2.00 and 2.65 mmol L-1) in nutrient solutions in an incomplete 5² factorial arrangement, which resulted in the following combinations: 2/0.05; 2/1.35; 2/2.65; 9/0.70; 9/2.00; 16/0.05; 16/1.35;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria brizantha; Nutrient; Nutrient solution; Root; Root length; Root surface.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700005
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Root system distribution and yield of 'Conilon' coffee propagated by seeds or cuttings PAB
Partelli,Fábio Luiz; Covre,André Monzoli; Oliveira,Marcos Goes; Alexandre,Rodrigo Sobreira; Vitória,Edney Leandro da; Silva,Marcelo Barreto da.
The objective of this work was to evaluate the root system distribution and the yield of 'Conilon' coffee (Coffea canephora) propagated by seeds or cuttings. The experiment was carried out with 2x1 m spacing, in an Oxisol with sandy clay loam texture. A randomized complete block design was used, following a 2x9x6 factorial arrangement, with two propagation methods (seeds and cuttings), nine sampling spacings (0.15, 0.30, 0.45, 0.60, 0.75, and 0.90 m between rows, and 0.15, 0.30, and 0.45 between plants within rows), six soil depths (0.10-0.20, 0.20-0.30, 0.30-0.40, 0.40-0.50, and 0.50-0.60 m), and six replicates. Soil cores (27 cm3) with roots were taken from 12 experimental units, 146 months after planting. The surface area of the root system and root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea canephora; Root diameter; Root length; Root volume; Vegetative propagation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000500349
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Roots of BRS Princesa banana fertigated with humic substances and saponin-based plant extracts Repositório Alice
COELHO, E. F.; MELO, D. M. de; PEREIRA, B. L. da S.; SANTOS, D. B.; ROSA, R. C. C..
This study aimed to evaluate the effects of fertigation with humic substances, with and without the addition of plant extracts, on the root system of the 'BRS Princesa' banana cultivar. The banana crop was cultivated at a spacing of 2.0 x 2.5 m and fertigated using a drip system in a dystrocohesive Yellow Latosol. The experimental design was randomized blocks, in a split-split-plot scheme with five replicates, for the following factors: humic substance doses and presence of a plant extract formulation. The treatments consisted of five doses of humic substances, based on a reference dose of 14.14 L ha-1 cycle-1, in the presence and absence of plant extract. The variable root length (cm) was subjected to variance analyses to evaluate the effect of the humic...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Comprimento de raiz; Ácido húmico; Ácido fúlvico; Fulvic acid; Humic acid; Musa spp; Root length.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055267
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Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts Agronomy
Coelho, Eugênio Ferreira; Melo, Diego Magalhães de; Pereira, Bruno Laecio da Silva; Santos, Djalma Barbosa dos; Rosa, Raul Castro Carriello.
This study aimed to evaluate the effects of fertigation with humic substances, with and without the addition of plant extracts, on the root system of the 'BRS Princesa' banana cultivar. The banana crop was cultivated at a spacing of 2.0 x 2.5 m and fertigated using a drip system in a dystrocohesive Yellow Latosol. The experimental design was randomized blocks, in a split-split-plot scheme with five replicates, for the following factors: humic substance doses and presence of a plant extract formulation. The treatments consisted of five doses of humic substances, based on a reference dose of 14.14 L ha-1 cycle-1, in the presence and absence of plant extract. The variable root length (cm) was subjected to variance analyses to evaluate the effect of the humic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.03.02.02-7 Musa spp.; Root length; Humic acid; Fulvic acid. Conservação do solo e fertirrigação.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30790
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Safflower root and shoot growth affected by soil compaction Bragantia
Sarto,Marcos Vinicius Mansano; Bassegio,Doglas; Rosolem,Ciro Antonio; Sarto,Jaqueline Rocha Wobeto.
ABSTRACT Safflower (Carthamus tinctorius L.) is a commercial seed crop grown for its good yield of high-quality oil. It is tolerant to water stress but may be sensitive to soil compaction. The aim of this study was to assess safflower growth under different degrees of soil compaction at depths of 0.15 m to 0.20 m. The experiment was carried out in PVC pots constructed from three rings. Five levels of penetration resistance (0.20, 0.33, 0.50, 0.93, and 1.77 MPa) were applied in the intermediate ring, and two safflower genotypes, IMA-4904 and IMA-2106, were examined. There was no difference between safflower genotypes with respect to their resistance to soil compaction, which reduced root length density in the compacted layer and changed the root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carthamus tinctorius L.; Root length; Bulk density; Penetration resistance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200348
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Sample size for measurement of root traits on common bean by image analysis. Repositório Alice
ARAÚJO, A.P.; FERNANDES, A.M.; KUBOTA, F.Y.; BRASIL, F.C.; TEIXEIRA, M.G..
Evaluation of root traits may be facilitated if they are assessed on samples of the root system. The objective of this work was to determine the sample size of the root system in order to estimate root traits of common bean (Phaseolus vulgaris L.) cultivars by digital image analysis. One plant was grown per pot and harvested at pod setting, with 64 and 16 pots corresponding to two and four cultivars in the first and second experiments, respectively. Root samples were scanned up to the completeness of the root system and the root area and length were estimated. Scanning a root sample demanded 21 minutes, and scanning the entire root system demanded 4 hours and 53 minutes. In the first experiment, root area and length estimated with two samples showed,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phaseolus vulgaris; Root area; Root length; Sampling; Área radicular; Comprimento radicular; Amostragem.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/110279
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Sample size for measurement of root traits on common bean by image analysis PAB
Araújo,Adelson Paulo; Fernandes,Aurélio Magno; Kubota,Flavio Yuudi; Brasil,Felipe Costa; Teixeira,Marcelo Grandi.
Evaluation of root traits may be facilitated if they are assessed on samples of the root system. The objective of this work was to determine the sample size of the root system in order to estimate root traits of common bean (Phaseolus vulgaris L.) cultivars by digital image analysis. One plant was grown per pot and harvested at pod setting, with 64 and 16 pots corresponding to two and four cultivars in the first and second experiments, respectively. Root samples were scanned up to the completeness of the root system and the root area and length were estimated. Scanning a root sample demanded 21 minutes, and scanning the entire root system demanded 4 hours and 53 minutes. In the first experiment, root area and length estimated with two samples showed,...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Phaseolus vulgaris; Root area; Root length; Sampling.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000400003
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Seasonal pattern of root growth in relation to shoot phenology and soil temperature in sweet cherry trees (Prunus avium): A preliminary study in central Chile Ciencia e Investigación Agraria
Bonomelli,Claudia; Bonilla,Carlos; Acuña,Edouard; Artacho,Pamela.
The period between flowering and harvest in the sweet cherry (Prunus avium L.) is shorter than most fruit trees; thus, competition for assimilate and nutrients occurs early in the season. To properly supply water and nutrients during this critical period, optimal growth and root development are necessary. To characterize the root growth pattern of cherry trees in relation to shoot growth and phenology, a study was conducted on a 'Bing' cherry orchard on Gisela 6 rootstock at fourth leaf, located in central Chile (34°70' S, 70°43' W). During the 2009-2010 season, the shoot length and fruit diameter were measured on eight trees, and the root length was quantified by installing rhizotrons on two trees. Additionally, a two-tone (black/white) plastic cover was...
Tipo: Journal article Palavras-chave: Accumulated degree days; Root growth; Root length; Soil temperature; Sweet cherry.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100010
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Sources and doses of aluminum in experiments with rice in nutrient solution AGRIAMBI
Freitas,Lucas B. de; Fernandes,Dirceu M.; Maia,Suelen C. M.; Moniz,Arianne; Mazziero,Beatriz G.; Steiner,Fábio.
ABSTRACT The aluminum source to produce toxicity in upland rice in nutrient solution experiments is not yet well established, althought the aluminum potassium sulfate has been utilized source to produce aluminum toxicity. However, in recent studies have used aluminum chloride. The aim of this study was to evaluate the capacity of aluminum sources and doses to produce toxicity in upland rice plants grown in nutrient solution. The experiment was arranged in a block randomized design, in a 2 x 5 factorial scheme and four repetitions. The treatments were two aluminum sources (aluminum potassium sulfate - AlK(SO4)2.12H2O and aluminum chloride - AlCl3.6H2O) and five aluminum doses in nutrient solution (0, 370, 740, 1100 and 1480 μmol L-1). The experiment was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Ionic activity; Visual Minteq; Root length.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700511
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การประเมินวิธีการปลูกเพื่อคัดกรองรากข้าว Thai Agricultural
Phuttapong Manokam; Nattinee Phatarakul; Sansanee Jamjod; ฺำBenjavan Rerkasem.
Rice plants with more roots are better at acquiring water and nutrients from the soil. But to study rice root system in the soil is time consuming and labour intensive, making screening for root traits in breeding programs difficult. The objective of this study was to compare root growth of two rice varieties with different rooting habits, Bue Bang and KDML105, in 8 rooting media, in order to develop a simple and rapid means for screening. The rooting media were T1, Sansai soil; T2, black loam soil; T3, 1:1 mixture (by weight) of black loam soil and fine sand; T4, 2:1 mixture of black loam soil and fine sand; T5, 1:1 mixture of black loam soil and coarse sand; T6, 2:1 mixture of black loam soil and coarse sand; T7, complete nutrient solution and T8,...
Tipo: PhysicalObject Palavras-chave: Rice root; Root length; Root dry weight; Screening method; ข้าว; รากข้าว; ความยาวราก; น้ำหนักแห้งราก; วิธีการประเมิน; วัสดุปลูก; การคัดเลือกพันธุ์; การปรับปรุงพันธุ์.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5433
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