|
|
|
| Registros recuperados: 137 | |
|
|
| Moraes, Sylvia Raquel Gomes; USP; Pozza, Edson Ampélio; UFLA; Pozza, Adélia Aziz Alexandre; UFLA; Carvalho, Janice Guedes de; UFLA; Souza, Paulo Estevão de; UFLA. |
| O objetivo deste trabalho foi avaliar o efeito do silicato de cálcio e do sulfato de cobre na intensidade da antracnose e no teor nutricional do feijoeiro. O experimento foi conduzido em blocos casualizados em arranjo fatorial 4 x 4 (quatro doses de silicato de cálcio, com quatro doses de sulfato de cobre) e dois tratamentos adicionais (plantas não-inoculadas e plantas pulverizadas com Benomyl). Foram feitas quatro avaliações da incidência e da severidade da doença, além de se mensurar a área foliar total. Ao término das avaliações, os dados de incidência e de severidade foram integrados ao longo do tempo, obtendo-se a área abaixo da curva de progresso da incidência (AACPI) e da severidade (AACPS). Os teores de N, P, K, Ca, Mg, B, Cu, Fe, Mn, Zn, Si e... |
|
Palavras-chave: 5.01.00.00-9 Agronomia Colletotrichum lindemuthianum; Phaseolus vulgaris; Manejo integrado; Nutrição mineral Colletotrichum lindemuthianum; Phaseolus vulgaris; Integrated management; Mineral nutrition. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/7037 |
| |
|
|
| Mota, Geraldo Magella Flôres da; UFU; Sousa, Egilson Roque; UFU; Ranal, Marli Aparecida; UFU. |
| Brassica chinensis var. parachinensis é uma hortaliça folhosa, de ciclo curto, introduzida no Brasil em 1992, em função de sua excelente qualidade nutricional. Apresenta elevado teor de β-caroteno, vitamina C, Ca e Fe, o que a torna importante alimento, especialmente no combate à anemia. Este trabalho teve como objetivo avaliar a produtividade biológica e agronômica da couve-da-Malásia, cultivada sob deficiência de N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Mo e Zn e comparada com o tratamento-testemunha que incluiu todos os macro e micronutrientes. As plantas cultivadas na ausência de N e P conseguiram completar o ciclo, mas foram significativamente menos produtivas e pouco desenvolvidas em relação às que receberam nutrição completa. Além disso,... |
|
Palavras-chave: 5.01.00.00-9 Agronomia Brassicaceae; Couve chinesa sem cabeça; Flowering white cabbage; Nutrição mineral; Tsoi sum Brassicaceae; Nonheading Chinese cabbage; Flowering white cabbage; Mineral nutrition; Tsoi sum. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/844 |
| |
|
|
| César, Mônica Lúcia; UNESP; Fonseca, Nara Rosseti; UNESP; Toledo, Mariana Zampar; UNESP; Soratto, Rogerio Peres; UNESP; Cavariani, Cláudio; UNESP; Crusciol, Carlos Alexandre Costa; UNESP. |
| A qualidade fisiológica das sementes pode ser afetada pelo estado nutricional das plantas, destacando-se, dentre os nutrientes, o fornecimento de enxofre, constituinte essencial dos aminoácidos. O trabalho objetivou avaliar os efeitos da adubação sulfatada em cobertura sobre a qualidade fisiológica de sementes de feijão cv. Pérola. O delineamento experimental utilizado foi em blocos casualizados, com quatro repetições. Os tratamentos foram constituídos por cinco doses de enxofre (0, 20, 40, 60 e 80 kg há-1) em cobertura, na forma de sulfato de amônio, 22 dias após a emergência das plântulas. Avaliou-se a qualidade fisiológica das sementes logo após a colheita mediante testes de germinação e vigor. A aplicação de enxofre, em cobertura, aumentou o vigor das... |
|
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Phaseolus vulgaris; Germinação; Vigor; Sulfato de amônio; Nutrição mineral Phaseolus vulgaris; Germination; Vigor; Ammonium sulfate; Mineral nutrition. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5968 |
| |
|
|
| Brondani, Gilvano Ebling; Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP); Araujo, Marla Alessandra; Universidade Federal de Lavras; Alcântara, Berenice Kussumoto; Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP); Carvalho, Janice Guedes; Universidade Federal de Lavras; Gonçalves, Antonio Natal; Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP); Almeida, Marcilio de; Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP). |
| The in vitro organogenesis of woody species plays an essential role in the improvement of forest products by providing saplings with high commercial value. Furthermore, mineral nutrition plays an important role in the induction of organogenic responses. The objective of this study was to evaluate the effects of boron and calcium in the organogenesis of nodal segments from seedlings of Eucalyptus grandis growing under in vitro conditions. The concentration of boron and calcium in MS medium was modified to induce organogenic responses in 45-day-old nodal segments used as explants. After 60 days, the fresh weight, dry weight, ratio of fresh and dry weight, relative water content and relative matter content accumulated by the explants were evaluated. The... |
| Tipo: Pesquisa com fatores controlados |
Palavras-chave: 5.01.03.04-0 bud induction; Callogenesis; Tissue culture; Mineral nutrition 5.01.03.04-0 bud induction; Callogenesis; Tissue culture; Mineral nutrition. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15143 |
| |
|
|
| Biscaro, Guilherme Augusto; Universidade Federal da Grande Dourados; Freitas Junior, Nasir Augusto de; Universidade Estadual de Mato Grosso do Sul; Soratto, Rogério Peres; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Kikuti, Hamilton; Universidade Estadual de Mato Grosso do Sul; Goulart Junior, Sidney Antonio Roseiro; Universidade Estadual de Mato Grosso do Sul; Aguirre, Washington Marques; Universidade Estadual de Mato Grosso do Sul. |
| O nitrogênio é o nutriente exigido em maior quantidade pelo feijoeiro e, mesmo quando suprida adequadamente desse nutriente, a planta de feijão pode ter sua produtividade limitada pela deficiência de molibdênio, pela participação deste no metabolismo do nitrogênio. O objetivo deste trabalho foi avaliar a resposta do feijoeiro (Phaseolus vulgaris L.), cultivar ‘BRS Pontal’, irrigado, à aplicação de nitrogênio em cobertura e molibdênio via foliar, quando cultivado em Neossolo Quartzarênico, no município de Cassilândia, Estado do Mato Grosso do Sul. O delineamento experimental foi o de blocos ao acaso, no esquema fatorial 4 x 2, com quatro repetições. Os tratamentos foram constituídos de quatro doses de nitrogênio (0, 30, 60 e 120 kg ha-1) aplicados em... |
|
Palavras-chave: Produção vegetal Phaseolus vulgaris; Adubação nitrogenada; Adubação foliar; Nutrição mineral; Molibdato de amônio; Ureia Phaseolus vulgaris; Nitrogen fertilization; Leaf application; Mineral nutrition; Ammonium molybdate; Urea. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6387 |
| |
|
|
| Araújo, Paulo Roberto de Andrade; UFV; Araujo, Geraldo Antonio de Andrade; UFV; Rocha, Paulo Roberto Ribeiro; UFV; Carneiro, José Eustáquio de Souza; UFV. |
| Foram conduzidos dois experimentos em Coimbra, Estado de Minas Gerais, um no verão-outono e outro na primavera-verão com o objetivo de avaliar o efeito de diferentes doses de molibdênio e nitrogênio sobre o feijoeiro, cultivar Meia Noite, utilizando delineamento em blocos casualizados, com quatro repetições, e esquema fatorial 4 x 2 x 2, envolvendo quatro níveis de molibdênio (0, 40, 80 e 120 g há-1) aplicados em pulverização foliar aos 25 dias após a emergência das plantas, duas doses nitrogênio aplicadas na semeadura (0 e 20 kg há-1) e aplicadas duas doses de nitrogênio em cobertura (0 e 50 kg há-1). Tanto na presença como na ausência de nitrogênio na semeadura ou cobertura, o incremento da dose de molibdênio até 80 g há-1 eleva o número de vagens por... |
|
Palavras-chave: 5.01.00.00-9 Agronomia Phaseolus vulgaris; Adubação foliar; Nutrição mineral Phaseolus vulgaris; Foliar fertilization; Mineral nutrition. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/7033 |
| |
|
|
| Melo, George Wellington Bastos de; Sete, Paula Beatriz; Ambrosini, Vitor Gabriel; Freitas, Rafael Fernando; Basso, Alex; Brunetto, Gustavo. |
| The purpose of this study was to evaluate the nutritional state, yield and composition of peaches on peach trees subjected to the application of organic compost to the soil. This experiment was conducted during the 2008 and 2009 cropping season in an orchard containing Chimarrita cultivars grafted onto Capdeboscq rootstocks and Haplumbrept soils in the municipality of Farroupilha (RS), Brazil. The treatments included 0, 9, 18, 36, 72 and 144 liters of organic compost per plant-1 year-1. The total nutrient contents in the leaves, yield components, yields per plant and hectare and compositions of the fruits were evaluated in 2008 and 2009 soon after harvest and after 30 days of storage. The application of organic compost to the soil increased the yield... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral nutrition; Organic waste; Prunus persica. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/25638 |
| |
|
|
| Islam,Muhammad; Safdar,Ali. |
| Nitrogen fixing capability of legumes can be enhanced by the supply of adequate amounts of nutrients, especially phosphorus (P) and sulphur (S). However, combined application of P and S may have synefgistic oí antognistic effects on crop yield, depending upon initial fertility status of soil, level of nutrients applied and test crop used. Field experiments were conducted at two different locations (Barani Agriculture Research Institute, Chakwal, and farmer's field, Talagang) in northern fainfed Punjab, Pakistan, to assess nodulation, nitrogen fixation and nutrient uptake by chickpea (Cicer arietinum L.) in response to application of P (0, 40 and 80 kg ha-1) and of S (0, 15 and 30 kg ha-1) in different combinations. Application of P and S significantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Legume; Mineral nutrition; Natural abundance technique; Nitrogen derived from air. |
| Ano: 2009 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000800005 |
| |
|
| |
|
|
| Souza,Marcelo C. de; Bueno,Paula C.P.; Morellato,Leonor P.C.; Habermann,Gustavo. |
| The cerrado's flora comprises aluminum-(Al) accumulating and non-accumulating plants, which coexist on acidic and Al-rich soils with low fertility. Despite their existence, the ecological importance or biological strategies of these functional groups have been little explored. We evaluated the leaf flushing patterns of both groups throughout a year; leaf concentrations of N, P, K, Ca, Mg, S, Al, total flavonoids and polyphenols; as well as the specific leaf area (SLA) on young and mature leaves within and between the groups. In Al-accumulating plants, leaf flushed throughout the year, mainly in May and September; for non-accumulating plants, leaf flushing peaked at the dry-wet seasons transition. However, these behaviors could not be associated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aluminum; Community; Herbivory; Mineral nutrition; Phenology; Specific leaf area. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200813 |
| |
|
|
| SOUZA,MARCELO C.; FRANCO,AUGUSTO C.; HARIDASAN,MUNDAYATAN; ROSSATTO,DAVI R.; ARAÚJO,JANAÍNA F. DE; MORELLATO,LEONOR P.C.; HABERMANN,GUSTAVO. |
| Despite limitations of low fertility and high acidity of the soils, the cerrado flora is the richest amongst savannas. Many cerrado woody species show sclerophyllous leaves, which might be related to the availability of water and nutrients in the soil. To better understand the function and structure of cerrado vegetation within its own variations, we compared two cerrado communities: one in its core region in central Brazil (Brasília, DF) and the other on its southern periphery (Itirapina, SP). We contrasted the length of the dry season, soil fertility rates, leaf concentrations of N, P, K, Ca and Mg and the specific leaf area (SLA) between these communities. The dry season was shorter on the periphery, where the soil was more fertile although more acidic.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Savanna; Mineral nutrition; Rainfall seasonality; Specific leaf area. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401691 |
| |
|
|
| FARIAS,JÚLIA G.; BERNARDY,KATIELI; SCHWALBERT,RAÍSSA; DEL FRARI,BIANCA K.; MEHARG,ANDREW; CAREY,MANUS; MARQUES,ANDERSON C.R.; SIGNES-PASTOR,ANTONIO; SAUSEN,DARLENE; SCHORR,MÁRCIO R.W.; TAVARES,MIRIAN S.; NICOLOSO,FERNANDO T.. |
| ABSTRACT A hydroponic experiment was carried out to investigate the effect of phosphorus (P) nutrition on arsenic (As) uptake and translocation within the seedlings of rice cultivars. The experiment occurred in three stages: I 5 days of acclimatization (nutritive solution); II 10 days under P (0.0 and 0.09 mM) and As (0.0 and 100 mM) treatments; III 5 days under recovery. The As exposure had significant effect reducing dry weights of shoots or roots, resulted in elevated concentrations of As in shoot tissues. BR-IRGA 409 showed the highest susceptibility to As in biomass production and root system parameters regardless the P level. This cultivar showed contrasting responses of As translocation to shoot tissue dependent on P levels, with the highest As... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral nutrition; Oryza sativa; Phosphate; Arsenic uptake.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100163 |
| |
|
|
| Cacique,Isaías Severino; Domiciano,Gisele Pereira; Rodrigues,Fabrício Ávila; Vale,Francisco Xavier Ribeiro do. |
| Blast, caused by the fungus Pyricularia oryzae, is the most important fungal disease of rice. The effect of silicon (Si) and manganese (Mn), and their interaction, on rice resistance to blast was investigated. Rice plants (cultivar "Metica 1") were grown in hydroponic solution with 0 or 2 mmol L-1 of Si and with 0.5, 2.5, and 10 mmol L-1 of Mn. Sixty-day-old plants were inoculated with a conidial suspension of P. oryzae and the incubation period (IP), the number of lesions (NL) per cm² of leaf area, the lesion size (LS), and blast severity were evaluated. Blast severity was scored at 48, 72, 96, and 144 hours after inoculation and data were used to obtain the area under blast progress curve (AUBPC). Silicon concentration was significantly higher in leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Pyricularia oryzae; Leaf spot; Mineral nutrition. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000200013 |
| |
|
|
| Cruz,Maria Fernanda Antunes da; Silva,Larisse Arantes Freitas; Rios,Jonas Alberto; Debona,Daniel; Rodrigues,Fabrício Ávila. |
| Considering the importance of blast, caused by Pyricularia oryzae, to reduce wheat yield, this study investigate how silicon (Si) could reduce the wheat blast symptoms in the rachis tissues using light microscopy and scanning electron microscopy. Wheat plants (cv. BR 18) were grown in hydroponic culture with either 0 (–Si) or 2 mM (+Si) of Si. Blast symptoms were very well developed on the spikes of the –Si plants, which showed intense discoloration in contrast with the spikes of the +Si plants. At 72 hours after inoculation (hai), fungal hyphae extensively colonized the epidermis and the collenchyma tissue in the radial direction in the rachis of the –Si plants. In the +Si plants, fungal hyphae colonized the epidermis and the collenchyma cells to a lesser... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum L.; Blast; Host defense responses; Mineral nutrition. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000200207 |
| |
|
|
| Cacique,Isaias Severino; Domiciano,Gisele Pereira; Moreira,Wiler Ribas; Rodrigues,Fabrício Ávila; Cruz,Maria Fernanda Antunes; Serra,Núria Sierras; Català,Ana Botta. |
| Blast, caused by Pyricularia oryzae, is the most important fungal disease of rice worldwide. This study aimed to compare root and foliar supply of soluble silicon (Si) on rice resistance to blast. The application of soluble Si to the roots increased Si concentration in leaf tissues as compare to plants grown in soil amended with calcium silicate. There was no increase in leaf Si concentration after soluble Si spray, regardless if the leaves were washed or not before analysis. X-ray microanalysis revealed that Si deposition was very similar on the leaf epidermis of plants sprayed with soluble Si, root amended with soluble Si or grown in soil amended with calcium silicate. The lesion size, the number of lesions per cm² of leaf and the area under blast... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pyricularia oryzae; Foliar disease; Mineral nutrition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052013000300013 |
| |
|
|
| Pompeu,Georgia Bertoni; Ambrosano,Guilherme Bovi; Vilhena,Milca Bartz; Carvalho,Rogério Falleiros; Gratão,Priscila Lupino; Andrino,Felipe; Lira,Simone Possedente de; Azevedo,Ricardo Antunes. |
| ABSTRACT Uptake of nutrients and cadmium (Cd) are dependent upon many factors, including plant species, ions concentration and pH. Tolerance to Cd-induced oxidative stress can be modulated by phytohormones such as abscisic acid (ABA), which induce the production of reactive oxygen species, activating proteins and enzymes involved in stress response and possibly stress tolerance. The present study aimed to evaluate the biochemical variations induced by Cd in ABA-deficient sitiens tomato mutant (sit) and its wild-type counterpart, Micro-Tom (MT), grown at different pH conditions. The plants were cultivated in nutrient solution (pH 5, 6 and 7; 20-days) and were then further grown over a 48-h period in 0 or 50 ?M CdCl2 at pH 6. Before Cd addition, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzymes; Micro-Tom; Mineral nutrition; Oxidative stress; Solanum lycopersicum. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300317 |
| |
|
|
| Dolinski,Marcos Antonio; Dangelo,Jessica Welinski de Oliveira; Cuquel,Francine Lorena; Motta,Antonio Carlos Vargas; Mio,Louise Larissa May De. |
| ABSTRACT The increasing consumer demand for fruit quality justifies the development of researches that combine orchards management and consumers’ perception of the quality of the product. The aim of this study was to evaluate the effect of nitrogen fertilization combined with green pruning intensity on fruit quality of ‘Chimarrita’ from high density peach trees during three consecutive harvest seasons. For this purpose, urea composed of different nitrogen rates (0, 40, 80, 120, 160, 200 and 240 kg.ha-1.year-1) was applied, under two intensities of green pruning (annual – once per season; or continuous – four times per season) in a factorial scheme (7 × 2). Fruits have been subjected to physical, chemical and sensorial analysis, made by 60 non-trained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prunus persica; Mineral nutrition; Fruit quality; Post-harvest; Organoleptic. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100134 |
| |
|
| |
|
| |
| Registros recuperados: 137 | |
|
|
|
