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| Registros recuperados: 277 | |
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| Ramella, João Ricardo Pompermaier; Battistus, André Gustavo; da Silva, Cristiano; Libardi, Keli Daiana Cristina; Castagnara, Deise Dalazen; de Oliveira, Paulo Sérgio Rabello; Neres, Marcela Abbado. |
| Mixed systems of exploitation of crop and livestock have called attention to the advantages over isolated systems of farming or ranching. Therefore, the objective of this study was to evaluate the influence of seeding rates of Brachiaria brizantha (0.0; 5.0; 10.0 e 15.0 kg ha-1) in the variables of corn productivity and B. brizantha plant stand when cultivated in the consortium. The experiment was established in a randomized complete block design with four replications using the maize cultivar Pioneer 30K64Y sown under the spacing of 0.90 m between rows. We evaluated the number of kernel rows, number of kernels per row, ear length, ear diameter, ear height, plant height, plant population and productivity in corn, as well as plant stand in B. brizantha.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Produtividade; Densidade de semeadura.. |
| Ano: 2013 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7016 |
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| Lana, Maria do Carmo; Rampim, Leandro; Schulz, Loivo Rogério; Kaefer, João Edson; Hartmann-Schimidt, Michele A.; Ruppenthal, Viviane. |
| Fertilizantes organominerais podem incrementar o teor de nutrientes dos fertilizantes e também podem aumentar a eficiência dos fertilizantes minerais. Desta forma, o trabalho teve o objetivo de avaliar a disponibilidade de P do fertilizante organomineral Umostart em comparação com fosfato monoamônico em plantas de milho. Foi conduzido um experimento em casa de vegetação no município de Marechal Candido Rondon – PR, em delineamento de blocos ao acaso com quatro repetições e com arranjo fatorial 5x2x2. Foram avaliadas cinco doses de P (0, 75, 150, 225 e 300 mg dm-3), duas fontes (Umostart e MAP-Fosfato Monoamônico) e dois solos, argiloso (LVef) e arenoso (PVd). Aos 30 dias após semeadura foi avaliado a produção de matéria seca da parte aérea e raízes, assim... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Adsorção de fósforo; Umostart; MAP.. |
| Ano: 2014 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7659 |
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| Offemann, Luiz Claudio; Guimaraes, Vandeir Francisco; Souza, Ricardo Felipe Braga de; Inagaki, Adriano Mitio; Battistus, Andre Gustavo; Rampim, Leandro. |
| This study aimed to investigate the interaction between the bacteria A. brasilense and H. seropedicae associated with nitrogen fertilization, aiming to supply nitrogen for corn crop. The experimental design was randomized blocks, in 4 x 3 factorial design with four replications. The first factor was formed by the treatments: no inoculation, inoculation H. seropedicae and A. brasilense in isolation and combination of the two strains. The second factor referred to nitrogen levels, 0, 60 and 120 kg ha-1 of N. Each experimental plot consisted of six corn lines of 3.5 meters, where the evaluation of yield components was performed: number of rows grain and number of kernels per row, thousand grain mass, average mass of grains per spike and productivity. Isolated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bactérias diazotróficas; Zea mays L.; Nitrogênio.. |
| Ano: 2015 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13315 |
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| Magalhães,Paulo César; Durães,Frederico Ozanan Machado; Oliveira,Antonio Carlos de; Gama,Elto Eugenio Gomes e. |
| Com o objetivo de verificar os efeitos de diferentes tipos de despendoamento no desenvolvimento de plantas e produção de sementes de milho, foi conduzido, um ensaio durante três anos agrícolas. Esse trabalho consistiu de cinco tipos de despendoamento (manual, macho-estéril, arranquio do cartucho, mecânico e testemunha) e três genótipos (linhagens A e B e o híbrido CMS 355), em suas versões férteis e estéreis. Esses tratamentos foram combinados num fatorial 5x3 com quatro repetições, num delineamento experimental de blocos ao acaso. As variáveis avaliadas, após a imposição dos tratamentos foram: altura da planta, área foliar e peso da matéria seca total. Na colheita, foram avaliados: altura de inserção de espiga, índice de espiga e produção de sementes. Os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Relação fonte/dreno; Particionamento; Pendão; Despendoamento; Zea mays L.. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000100012 |
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| Ahrens,D.C.; BarroS,A.S.R.; Villela,F.A.; Lima,D.. |
| O trabalho avaliou a remoção de água e a qualidade de sementes de milho submetidas a secagem intermitente rápida e lenta, sob temperaturas do ar de 60oC e 70oC, respectivamente. Para tanto, na safra 94/95 sementes básicas da cultivar IAPAR 26, apresentando 22% de água, foram colhidas com automotriz, em Ponta Grossa - PR, e secadas em secadores comerciais, utilizando-se como tratamento referencial a secagem à sombra até 13% de água. No transcurso das secagens a redução do teor de água das sementes foi monitorado, em intervalos de trinta minutos, para o estabelecimento das velocidades e curvas de secagem. A qualidade fisiológica foi avaliada nas sementes amostradas, antes da secagem, no estágio intermediário e ao final das secagens, através dos testes de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Secagem; Qualidade; Sementes; Milho. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000200023 |
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| Kato,Fabiana Hibary; Carvalho,Marcia Eugenia Amaral; Gaziola,Salete Aparecida; Piotto,Fernando Angelo; Azevedo,Ricardo Antunes. |
| ABSTRACT: In general, the effects of Cadmium (Cd) on crop quality are evaluated solely by Cd accumulation in the edible plant parts; thus, the potential effects on several nutritional features are not often taken into account. This study evaluated Cd effects on the enzymatic activities of lysine (Lys) metabolism, storage protein and amino acid profile in maize. Stress parameters were also assessed. In vegetative organs, Cd was accumulated in the following decreasing order: roots > stems > leaves. Cadmium accumulation in grains decreased at grain maturity (from 0.25 to 0.07 µg g−1 DW). In leaves, neither hydrogen peroxide content nor superoxide dismutase, catalase, ascorbate peroxide and guaiacol peroxidase activities did not change in Cd-treated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Aspartate kinase; Corn; Dihydrodipicolinate synthase; Heavy metal. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101300 |
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| Lasa,Berta; Irañeta,Iosu; Muro,Julio; Irigoyen,Ignacio; Aparicio Tejo,Pedro María. |
| Nitrate leaching as a result of excessive application of N-fertilizers and water use is a major problem of vulnerable regions. The farming of maize requires high N fertilization and water inputs in Spain. Isotopic techniques may provide information on the processes involved in the N and C cycles in farmed areas. The aim of this work was studying the impact of sprinkler and furrow irrigation and N input on maize (Zea mays L.) yields, and whether isotopic composition can be used as indicator of best farming practices. Trials were set up in Tudela (Spain) with three rates of N fertilization (0, 240 and 320 kg urea-N ha-1) and two irrigation systems (furrow and sprinkler). Yield, nitrogen content, irrigation parameters, N fate and C and N isotope composition... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Furrow irrigation; Nitrogen; Sprinkler irrigation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200008 |
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| Durães,F.O.M.; Magalhães,RC.; Costa,J.D.; Fancelli,A.L.. |
| O presente trabalho teve por objetivo avaliar as relações entre fonte de assimilados e grão-dreno, bem como o comportamento de fatores morfo-fisiológicos que limitam o rendimento de grãos em plantas de milho de diferentes ciclos (normal, precoce e superprecoce), cultivadas em semeadura tardia (safrinha), com três densidades (33 mil, 55 mil e 77 mil plantas/ha). Verificou-se a eficiência de híbridos de milho quanto à duração do crescimento e rendimento, nas fases vegetativa e reprodutiva. Os rendimentos em grãos variaram entre os híbridos e entre as densidades e foram significativamente superiores nas maiores densidades de cultivo, para os três híbridos avaliados. Valores máximos de índice de área foliar, dentro de híbrido, resultaram em maiores rendimentos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Híbridos; Ciclos; Densidade; Safrinha; Grão-dreno. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000300014 |
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| Furlani,Ângela Maria Cangiani; Furlani,Pedro Roberto; Meda,Anderson Rotter; Duarte,Aildson Pereira. |
| Zinc deficiency usually occurs in maize grown in Brazilian acidic soils. The aim of this study was to evaluate commercial maize cultivars for their Zn uptake and utilization efficiency. A greenhouse experiment using nutrient solution with young plants was carried out at Campinas, State of São Paulo, Brazil, in 2002. Treatments consisted of: 0.0; 0.1; 0.2; 0.4 and 0.8 mg L-1 Zn in the main plots and 24 commercial maize cultivars in the subplots, in a randomized complete block design. Zn concentration in shoot dry matter (SDM) ranged from 28.4 to 41.6 mg kg-1 among cultivars, clearly indicating a dilution effect, since a negative relation between SDM and plant height was shown. Total Zn-shoot content was a good parameter to discriminate cultivars, once... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Zn-efficiency; Zn uptake; Zn-deficiency; Commercial cultivars. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300010 |
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| Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado. |
| Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010 |
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| Blanco,Flávio Favaro; Folegatti,Marcos Vinícius; Gheyi,Hans Raj; Fernandes,Pedro Dantas. |
| Corn (Zea mays L.) is an important crop in Brazil and is cultivated in all regions, including the semi-arid area of Brazil, where the occurrence of irrigation water with high concentration of salts is common. Evaluating the growth and yield of the maize hybrid 'AG 6690' irrigated with water of different salinity levels was the objective of this experiment. Sowing was performed in pots with 12 seeds on May 23, 2003, and seedlings were thinned to two plants per pot. Irrigation was accomplished when the mean soil matric potential of each treatment was approximately -30 kPa using water with seven different electrical conductivities (ECi), varying from 0.3 to 4.5 dS m-1, which were obtained by addition of NaCl and CaCl2 in the equivalent proportion of 1:1. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Tolerance to salinity; Soil solution; Leaf area; Evapotranspiration. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600002 |
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| Storck,Lindolfo; Lopes,Sidinei José; Cargnelutti Filho,Alberto; Martini,Luiz Fernando Dias; Carvalho,Melissa Pisaroglo de. |
| Using adequate sample size in experimental units improves the efficiency of the research. In the agricultural year of 2004/2005, an experiment was conducted in Santa Maria, Rio Grande do Sul State, Brazil, with the objective of estimating sample size for the following traits: ear length, ear and cob diameter, ear weight, weight of grains per ear, cob weight and the weight of 100 grains, number of grain rows per ear, number of grains per ear and length of grains for two single hybrids (P30F33 and P Flex), two three-way hybrids (AG8021 and DG501) and two double hybrids (AG2060 and DKB701) of maize. For a 5% (D5) precision, the weight traits (dehusked ear weight, weight of grains per ear, cob weight and weight of 100 grains) can be sampled with 21 ears; the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Experimental accuracy; Sampling. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100005 |
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| Moura,Emanoel Gomes de; Coelho,Kátia Pereira; Freitas,Idelfonso Colares de; Aguiar,Alana das Chagas Ferreira. |
| In the humid tropic, chemical and physical soil properties that decrease soil's nutrient availability and increase oxygen deficiency are important as restrictions to crop growth. The objective of this study was to evaluate the relations between plant growth and chemical and physical fertility indicators of an Ultisol developed from sediments of the Itapecuru Formation in Central-Northern state of Maranhão, Brazil. An experiment was established with randomized block design, four replicates, and six treatments: 6.0 Mg ha-1 mulch with or without liming; 3.0 Mg ha-1 mulch with or without liming; bare soil with or without liming. Determinations in the plants included leaf area index, net assimilation rate, and the yield parameters: mean number and weight of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Growth; Yield; Effective porosity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000600012 |
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| Vancetovic,Jelena; Ignjatovic-Micic,Dragana; Trbovic,Dejana; Delic,Nenad; Bozinovic,Sofija; Nikolic,Ana; Kostadinovic,Marija. |
| ABSTRACT A pilot experiment was undertaken in order to examine high oil populations of maize (Zea mays L.) to be used as pollinators in TopCross blends with commercial ZP341 standard hybrid. Five high oil populations (HOPs) from the Maize Research Institute (MRI) gene bank were chosen for this research, according to their high grain oil content, synchrony between silking of ZP341 and anthesis of the populations and good agronomic performances in 2012. Selfing of ZP341 and HOPs, as well as crosses of ZP341 cmsS sterile × HOPs were carried out in 2013. Oil content, fatty acid composition, protein and tryptophan content, and physical characteristics of the obtained kernels were measured. Four HOPs showed significant positive influence on the oil content in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; High oil; Pollinators. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600461 |
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| Registros recuperados: 277 | |
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