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| Registros recuperados: 1.298 | |
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| Assunção,Heli H. T. de; Cunha,João P. A. R. da; Silva,Sérgio M.; Alves,Guilherme S.; Lemes,Ernane M.. |
| ABSTRACT It is a well-known fact that the application of pesticides can be improved using an electrostatic spray due to the reduction of the application rate and increase in deposition on plant targets. However, little information exists on the use of such technology in maize crops. Thus, this study is aimed to evaluate the spray deposition on maize resulting from spray application using an electrostatic sprayer in combination with low application rates and different spray compositions. A field experiment was conducted in a randomized block having a 2×2×2 factorial design with two application rates (95 and 52 L ha-1), with or without the spray electrification, and with or without the synthetic adjuvant. The droplet electrification ability, interference of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Application rate; Electrified droplet; Spray technology; Spray deposition. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400503 |
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| Garcia,Luiz C.; Weirich Neto,Pedro H.; Justino,Altair; Eurich,Joelcio; Souza,Nátali M.. |
| ABSTRACT The aim of this study was to analyze the influence of space between the base and intermediate base on quality of seed distribution with a horizontal seed plate. The experiment was carried out in 2012 at the Laboratory of Agricultural Mechanization of the State University of Ponta Grossa - PR, Brazil, using a sowing simulation device. The experimental design was completely randomized design with four treatments and seven replications. Treatments consisted of spaces (0, 1, 2, and 3 mm) between the base and intermediate base. Replications were defined by 250 spacing between seeds. Corn (Zea mays L.), soybean (Glycine max L. Merrill), and sorghum (Sorghum bicolor Moench) seeds were tested. The analyzed variables were faulty, multiple and acceptable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Horizontal seed plate; Glycine max; Seeder-fertilizer machine; Sorghum bicolor; Zea mays. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100128 |
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| Dias,Vilnei de O.; Souza,Renato S. de; Alonço,Airton dos S.. |
| Com o objetivo de avaliar a relação custo/benefício da adoção de espaçamento reduzido na cultura do milho em relação à aquisição de uma plataforma específica para a colheita mecanizada de grãos, foi realizado um estudo considerando as diferentes variáveis que interferem no investimento. Para tal, foi confeccionado um fluxo de caixa diferencial. Foram calculados com base no fluxo de caixa os indicadores de viabilidade econômica Valor Presente Líquido (VPL), Período de Retorno do Capital (PRC) e Taxa Interna de Retorno (TIR). Fez-se, ainda, a análise de sensibilidade sobre o VPL para variações no aumento da produtividade. Os VPLs encontrados ficaram entre R$ -32.157,00 e R$ 484.022,00. O PRC variou de 1,74 a 17,13 anos, e a TIR de -0,70 a 55,04%. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Custos de produção; Colheita mecanizada; Zea mays. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162007000300015 |
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| Rodrigues,Marcos S.; Corá,José E.; Fernandes,Carolina. |
| Taking into account that the sampling intensity of soil attributes is a determining factor for applying of concepts of precision agriculture, this study aims to determine the spatial distribution pattern of soil attributes and corn yield at four soil sampling intensities and verify how sampling intensity affects cause-effect relationship between soil attributes and corn yield. A 100-referenced point sample grid was imposed on the experimental site. Thus, each sampling cell encompassed an area of 45 m² and was composed of five 10-m long crop rows, where referenced points were considered the center of the cell. Samples were taken from at 0 to 0.1 m and 0.1 to 0.2 m depths. Soil chemical attributes and clay content were evaluated. Sampling intensities were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Precision agriculture; Zea mays. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500005 |
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| Pérez-Luna,Yolanda del Carmen; Álvarez-Solís,José David; Mendoza-Vega,Jorge; Pat-Fernández,Juan Manuel; Gómez-Álvarez,Regino; Cuevas,Laura. |
| El presente trabajo tuvo como objetivo conocer la densidad, abundancia y diversidad de especies de hongos micorrízicos arbusculares (HMA) asociadas al cultivo de maíz (Zea mays L.) en parcelas que han sido manejadas con bajos ingresos de insumos externos y evaluar su respuesta a la aplicación de abono verde/cultivo de cobertura (AVCC) y biofertilizantes. El trabajo se realizó en siete parcelas de productores de maíz, de las cuales tres han sido manejadas con frijol nescafé (Mucuna deeringiana Merr.) como AVCC y cuatro sin dicho antecedente de manejo. En cada una de las parcelas se establecieron cuatro tratamientos de biofertilización: 1) inoculación con micorriza arbuscular, 2) aplicación de fertilizante orgánico foliar, 3) inoculación con micorriza +... |
| Tipo: Journal article |
Palavras-chave: Micorriza arbuscular; Biodiversidad; Mucuna deeringiana; Zea mays; Agricultura orgánica. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100006 |
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| Kajihara,Daniela; Godoy,Fabiana de; Hamaji,Thais Alves; Blanco,Silvia Regina; Van Sluys,Marie-Anne; Rossi,Magdalena. |
| Transposable elements (TEs) account for a large portion of plant genomes, particularly in grasses, in which they correspond to 50%-80% of the genomic content. TEs have recently been shown to be a source of new genes and new regulatory networks. The most striking contribution of TEs is referred as molecular domestication, by which the element coding sequence loses its movement capacity and acquires cellular function. Recently, domesticated transposases known as mustang and derived from the Mutator element have been described in sugarcane. In order to improve our understanding of the function of these proteins, we identified mustang genes from Sorghum bicolor and Zea mays and performed a phenetic analysis to assess the diversity and evolutionary history of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Domesticated tranposases; Saccharum sp.; Sorghum bicolor; Transposable elements; Zea mays. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400014 |
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| Silveira,Bruna de S; Torres,José Luiz R; Orioli Júnior,Valdeci; Favaro,João Henrique de S; Costa,Luciene L; Charlo,Hamilton César de O. |
| ABSTRACT Intensive conventional tillage cultivation of both green and sweet corn can contribute to soil degradation when compared to no-till systems. This study aimed to assess the agronomic characteristics and physicochemical quality of green and sweet corn grains grown under succession planting using different cover crops. Two experiments were conducted, one with green corn and the other sweet corn, using a randomized block design consisting of seven treatments: brachiaria (B); Pearl millet (PM); showy crotalaria (SC); SC+B; PM+B; PM+SC and PM+SC+B, with four repetitions. The fresh (FW) and dry weight (DW) of the cover crops and decomposition of their residue were assessed, in addition to the agronomic performance and bromatological quality of green and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Specialty corn; Plant residues; Productivity; Physicochemical characteristics. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362021000100094 |
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| Rocha,Disraeli R da; Fornasier Filho,Domingos; Barbosa,José Carlos. |
| A cultura do milho-verde é alternativa de grande valor econômico para pequenos e médios agricultores, principalmente em áreas irrigadas. O objetivo do trabalho foi avaliar o rendimento comercial de espigas verdes e de outras características das plantas de seis cultivares de milho, submetidas a quatro densidades populacionais. Utilizou-se o delineamento experimental em parcelas subdivididas, com seis tratamentos principais (cultivares), quatro tratamentos secundários (densidade populacional) e quatro repetições dispostas em blocos casualizados. As cultivares Cativerde 2, P3232, BM3061 e AG4051 apresentaram as maiores alturas de plantas, enquanto SWB551 foi a mais reduzida. A menor altura média de inserção da primeira espiga foi obtida pela cultivar SWB551.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Híbridos; Variedade; Milho doce; Acúmulo térmico. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000300023 |
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| Puiatti,Mário; Fávero,Claudenir; Finger,Fernando Luis; Gomes,Jorge M. |
| Objetivando avaliar a viabilidade agronômica e econômica da associação inhame e milho doce, foi desenvolvido um trabalho em área da horta de pesquisas da Universidade Federal de Viçosa, em sistema de consórcio (associação aditiva), utilizando-se inhame (Colocasia esculenta) 'Chinês' como cultura principal e milho doce (Zea mays) 'Doce Cristal' como cultura contrastante. O inhame foi plantado em sulcos de 12 cm de profundidade, no espaçamento de 100 x 30 cm, e o milho doce em covas de 3 cm de profundidade, na fileira de plantio, entre as plantas de inhame, 40 dias após plantio do inhame. O delineamento experimental foi de blocos ao acaso, com quatro repetições, no esquema fatorial (3 x 2) + 2 (três arranjos de plantas: uma planta de milho a cada 30 cm; duas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colocasia esculenta; Zea mays; Cultivos múltiplos. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362000000100006 |
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| Castro,Renato S; Silva,Paulo Sérgio L; Cardoso,Milton J. |
| In corn, when the first female inflorescence is removed, the plant often produces new female inflorescences. This allows the first ear to be harvested as baby corn (BC) and the second as green corn (GC) or dry corn (DC), that is, mature corn. The flexibility provided by a variety of harvested products allows the grower to compete with better conditions in the markets. We evaluated BC, GC, and DC yields in corn cultivars AG 1051, AG 2060, and BRS 2020, after the first ear was harvested as BC. A random block design with ten replicates was utilized. The yields of MM, MV and MS were higher when these products were individually harvested than when they were harvested in combination with baby corn (BC + GC and BC + DC). Cultivar BRS 2020 was the best for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Green ears; Grain; Prolificacy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000100016 |
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| Souza Filho,Antonio L; Oliveira,Fábio HT; Preston,Welka; Silva,Gerônimo F; Carvalho,Simplício L. |
| ABSTRACT Melon producers, in Chapada do Apodi, Rio Grande do Norte State, Brazil, located between the states of Ceará and Rio Grande do Norte, have cultivated corn in succession to the melon crop. However, this crop rotation is not yet evaluated on the extent to which the residual effect of nitrogen and phosphate fertilization carried out in melon can supply partially or completely the corn demands of nitrogen and phosphorus. This work aimed to evaluate the effect of nitrogen (N) and phosphorus (P) in the production of corn in succession to the cultivation of melon (Cucumis melo) irrigated in an Alkaline Inceptisol of Chapada do Apodi. Ten treatments from the combinations between five N rates (0; 45; 90; 160 and 220 kg/ha) and four levels of P2O5 (0; 40;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Zea mays; Continuous cultivation; Fertilization; Residual effect.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000300392 |
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| Bordallo,Patricia do N.; Pereira,Messias G.; Amaral Júnior,Antônio T. do; Gabriel,Ana Paula C.. |
| Com o objetivo de investigar a capacidade combinatória, bem como o efeito recíproco em dialelo envolvendo genótipos de milho doce e comum, avaliaram-se seis caracteres de interesse agronômico e industrial: altura de plantas, estande, porcentagem de espigas atacadas por pragas, teor de proteína no grão, peso médio de espiga sem palha e comprimento médio de espiga sem palha. Os valores dos quadrados médios referentes à capacidade geral de combinação (<IMG SRC="/img/revistas/hb/v23n1/a26img01.gif">) e capacidade específica de combinação (Sij) foram significativos para as características altura de planta, peso médio de espiga sem palha, comprimento médio de espiga sem palha e teor de proteína no grão, indicando a presença de efeitos gênicos aditivos e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Capacidade combinatória; Efeito recíproco. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000100026 |
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| Silva,Paulo Sérgio L e; Silva,Jaeveson da; Oliveira,Fábio Henrique T de; Sousa,Ana Karenina F de; Duda,Gustavo P. |
| The present concern about environmental degradation has produced a renewed interest in organic fertilizers, such as animal manures. In addition, the soil organic matter conservation is one of the most important limiting factors for sustainability development in semiarid regions. In a previous experiment, carried out to evaluate the direct effects of application of manure rates in corn, positive effects of this fertilization were observed on green ear yield and grain yield. It was also verified that manure increased water retention and availability, and phosphorus, potassium, and sodium contents in the soil layer from 0-20 cm, but did not influence pH, calcium, organic matter contents and the sum of bases. The objective of this work was to evaluate the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Organic fertilization; Cultivars. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362006000200008 |
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| Kwiatkowski,Angela; Clemente,Edmar; Scapim,Carlos Alberto. |
| In Brazil, the greengrocery market of sweet corn has been expanding along the country. In contrast, there have been few agri-industries canning sweet corn (Zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. The purpose of this study was to evaluate the general combining ability (GCA) of seven inbred lines of sweet corn, and the specific combining ability (SCA) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. In the growing season 2006/2007, twenty-one single hybrids were evaluated in the Iguatemi Research Station, Maringá County, Northwestern Paraná, in Brazil using a complete randomized block design with four replications. Data were subjected to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; General combining ability; Specific combining ability; Grain quality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000400015 |
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| Silva,Paulo SL; Silva,Paulo IB; Oliveira,Vianney R; Silva,Kadson EF; Monteiro,Alex L. |
| O rendimento do milho pode ser aumentado com a aplicação de doses de resíduos de espécies vegetais perenes. Muitos agricultores do Nordeste do Brasil utilizam resíduos de folhas da carnaubeira, uma palmeira nativa dessa região, para suprir as deficiências dos solos pobres em matéria orgânica. O objetivo do trabalho foi avaliar os efeitos da aplicação de doses de resíduos foliares da carnaubeira sobre o rendimento de espigas verdes de duas cultivares de milho. O estudo foi complementado pela avaliação também do rendimento de grãos. Doses de resíduos foliares (0, 2, 4, 6, 8 e 10 t ha-1) foram aplicadas nos sulcos de semeadura de cultivares de milho (AG 1051 e BR 106). Utilizou-se o delineamento de blocos ao acaso com cinco repetições e parcelas subdivididas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copernicia prunifera; Zea mays; Milho verde; Rendimento de grãos; Bagana; Palha. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000100074 |
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| Registros recuperados: 1.298 | |
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