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| Registros recuperados: 1.082 | |
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| Portes, Tomás Aquino; Melo, Hyrandir Cabral de. |
| Mathematical models were tested to correlate the leaf area index (LAI) of maize to the percentage of light intercepted by the canopy (% LIC) and this with the total dry matter of aerial parts (TDM), as well with the grain yield (GY). The experiment was conducted in a randomized block design, with four replications. The treatments consisted of hybrid maize at five plant densities: 4.0, 2.66, 2.0, 1.6, and 1.3 plants per m2 (pl m-2). At densities of 4.0 and 2.66 pl m-2, the average LAI and TDM did not differ among themselves but were significantly higher than those presented at the densities of 2.0, 1.66 and 1.3 pl m-2, which also did not differ among themselves. The number of corncobs per plant (cob pl-1) and GY behaved similarly. The LAI grew exponentially... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias Fisiologia de Plantas Cultivadas age; Corn; Radiation; Yield Fisiologia de Plantas Cultivadas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17892 |
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| Perim, Rozana Castro; Instituto Federal Goiano; Costa, Kátia Aparecida de Pinho; Instituto Federal Goiano; Epifanio, Patrícia Soares; Instituto Federal Goiano; Teixeira, Daniel Augusto Alves; Instituto Federal Goiano; Fernandes, Patrick Bezerra; Instituto Federal Goiano; Santos Júnior, Divino Rosa dos; Instituto Federal Goiano. |
| This study determined the fractionation of protein and carbohydrate of Piata palisadegrass ensiled with energetic meals. The experiment was developed at the Federal Institute of Goiás State, Rio Verde Campus, using a completely randomized design with four replications, in a 4 x 5 factorial arrangement, being four energetic meals (millet, corn, sorghum and wheat) and five levels of addition (0, 8, 16, 24 and 32%). The meals were obtained by grinding the grains, where the levels of addition were calculated based on natural material. The results indicated that the energetic meals represented good sources of additives for ensiling Piata palisadegrass, for considerably improving protein and carbohydrate fractions. However, among the meals used, the sorghum was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Brachiaria brizantha; Corn; Millet; Sorghum; Wheat. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22046 |
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| Gazor, Hamid Reza; Roustapour, Omid Reza. |
| Handling systems in seed processing factories inflict impressive damages on seed corn. It was reported 24% of damages on seed corns related to elevators. In current research, the operation of a Z- Shape elevator was studied and compared to conventional bucket elevator which employed in two seed drying stations of Seed and Plant Improvement Institute in Karaj city and Shahi plant in Moghan plain, Iran. The effect of elevator operation on seed cracking and breakage was determined by t- test. According to the results, applying Z- Shape elevator decreased the physical seed damages up to 78% and reduced the chance of seed cracking between 4 to 8% in comparison with conventional elevators. Economically results illustrated spending the cost equal to 10% of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conveying system; Corn; Loss; Seed; Z- Shape elevator. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6689 |
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| Sobowale, Sunday; Omotoso, Oluwole; Olatidoye, Olawale; Olayanju, Adeniyi; Mulaba-Bafubiandi, Antoine. |
| The economic situation in most developing countries has left farmers and processors operating at small scale and under unhygienic environment. The productivity is often too low to justify labor and time investment. With respect to the challenges particularly associated with roasting of corn, a roaster was designed, constructed and its performance evaluated. The mechanized charcoal fuelled corn roaster consists of a frame, roasting unit, charcoal tray, air blowing unit and a power transmission system. The functional efficiency of the machine at different roasting temperatures of 100, 130 and 150 oC ranged between 88 and 94%, while the roasting capacity and roasting time ranged between 40 and 54 fresh corns per hour in 22 and 30 min, respectively. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn roaster; Corn; Design and construction; Sensory evaluation; Food security. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5975 |
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| Sayago,S; Bocco,M. |
| Development of models for crop yield prediction using remote sensing allows accurate, reliable and timely estimations over large areas. Particularly, this information is necessary to ensure the adequacy of a nation's food supply as well as to aid policy makers and farmers. In Argentina, soybean (Glycine max (L.) Merr.) and corn (Zea mays L.) are the most important crops. The goal of this research was to develop and evaluate linear and non-linear models to estimate crop yield from satellite data. Particularly, we proposed and applied those models to obtain soybean and corn yield in the central region of Córdoba (Argentina) using Landsat and SPOT images. The models were designed taking into account all or some bands included in the images from one or both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neural networks; Multiple linear regression; Soybean; Corn; Modelling. |
| Ano: 2018 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2018000100001 |
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| Cavalcante,D.R.; Perin,F.B.; Benedetti,E.. |
| Dry matter (DM) ruminal degradability of corn (Zea mays L.), millet (Pennisetum glaucum (L. R. Br.) and sorghum (Sorghum bicolor L. Moench.) was evaluated using in situ technique with samples in green chopped and ensiled forms. Two crossbred fistulated (live weight of 480kg) dry cows participated. Samples of six grams in each forage were incubated in the rumen for 6, 24 and 96 hours. We estimated time zero (t0) washing the bags in water and it was used to calculate solubility. The experimental design followed a randomized block design with a split plot. We compared the average of DM through the SNK test at 5% probability. The results of disappearance (%) of dry matter forages of green chopped and ensiled forms in 0, 6, 24 and 96 hours were respectively:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromatology plant; Corn; Kinetics; Millet; Sorghum. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100023 |
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| Dessimoni,G.V.; Sakomura,N.K.; Donato,D.C.Z.; Soares,L.; Sarcinelli,M.F.; Malheiros,E.B.; Dalólio,F.S.. |
| ABSTRACT An experiment was conducted to evaluate broiler chicken performance and carcass yield in response to carbohydrase supplementation (Xylanase and Betaglucanase; XB) and association of carbohydrase and phytase (PHY). A total of 1,920 day-old male broiler chicks (Cobb 500) were distributed in a completely randomized design with 8 treatments and 8 replicates each, allocated in 64 pens with 30 chicks each. The treatments were: Positive Control (PC); Negative Control (NC): reduced ME [-120kcal/kg (Starter) and -170kcal/kg (Finisher)]; NC + XB [50g/ton]; NC + XB [100g/ton]; NC + XB [150g/ton]; NC + XB [50g/ton] + PHY [100g/ton]; NC + XB [100g/ton] + PHY [100g/ton]; NC + XB [150g/ton] + PHY [100g/ton]. The inclusion of XB (150) and XB (50, 100, and 150)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additives; Corn; Metabolizable energy; Enzyme; Soybean meal. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300983 |
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| Dias,Marcos Altomani Neves; Cicero,Silvio Moure. |
| ABSTRACT Seed treatment is an interesting alternative to deliver micronutrients to field crops. The aim of this study was to investigate the uptake of Cu and Zn by maize seedlings, with the application of the water-insoluble sources copper carbonate and zinc oxide as seed treatment. Treatments were composed of a control (untreated seeds), five doses of copper (0.14, 0.28, 0.56, 1.12 and 2.24 mg Cu∙seed–1) and zinc (0.55, 1.10, 2.20, 4.40 and 8.80 mg Zn∙seed–1) as well as five doses of copper and zinc combined (0.14, 0.28, 0.56, 1.12 and 2.24 mg Cu∙seed–1; 0.55, 1.10, 2.20, 4.40 and 8.80 mg Zn∙seed–1). Plants were cultivated in sand, under greenhouse conditions and, at the two-leaf stage (15 days), the root and shoot tissues dry mass and concentration of Cu... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Corn; Seed treatment; Micronutrients. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300286 |
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| Santos,Célio Trzeciak dos; Dalpasquale,Valdecir Antoninho; Scapim,Carlos Alberto; Braccini,Alessandro de Lucca e; Krzyzanowski,Francisco Carlos. |
| The experiment was carried out to evaluate the time for harvesting seeds of three hybrids of corn (Zea mays L.) at their best physiological quality and the use of the milk line as an indicator of the physiological seed maturity. Single hybrids CD 1723 and CD 5501 and double hybrid OC 705 seeds were collected for 59 days, every four days, starting 23 days after female flowering. Seed dry weight, moisture content, germination, vigour (cold and accelerated aging tests), black layer formation and seed milk line development were analysed. The harvesting time started 47 days after female flowering with high physiological quality of the seeds identified by a joint analysis of those seven characteristics of them. The milk line at stage 4 proved to be the best... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn; Seeds; Harvesting time; Milk line. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200001 |
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| Souza,Silvia Graciele Hülse de; Carpentieri-Pípolo,Valéria; Ruas,Claudete de Fátima; Carvalho,Valdemar de Paula; Ruas,Paulo Maurício; Gerage,Antônio Carlos. |
| The RAPD and SSR markers were used to compare the genetic diversity among the 16 maize inbred lines. Twenty-two primers were used in the RAPD reactions, resulting in the amplification of 265 fragments, while 16 pairs of SSR primers resulted in 75 fragments. The similarity based on Dice coefficient for the RAPD ranged from 53 to 84% and for the SSR from 11 to 82%. The dendrogram obtained by the RAPD showed five groups, while dendrogram obtained by the SSR showed three groups and one isolated line. The association constructed from the markers and the principal coordinates analysis separated lines into two groups according to endosperm color, either orange or yellow. The RAPD were effective to validate pedigree data, while the SSR were effective to recognize... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn; Distance genetic; Microsatellites; Molecular markers; Polymorphism; RAPD. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100022 |
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| Scaff,Rejane Maria Cirra; Scussel,Vildes Maria. |
| Corn flour, "canjica" (corn grits), corn flakes and popcorn for human consumption, commercialized in Santa Catarina (n=82), were analyzed in order to detect the presence of fumonisins B1 (FB1) and B2 (FB2). From the samples, 92.68% showed detectable levels of Fumonisins (FBs). Corn flour showed the highest level of contamination (91.5%) with average levels of 3.811 and 5.737 mg/g for the home-processed and industrialized products, respectively. The next most contaminated product was popcorn with a average of 2.872 mg/g and an occurrence in 91.6% of the samples. All samples of corn flakes were contaminated with an average of 1.307 mg/g. The product with the lowest levels of FBs was "canjica" with a average contamination of 0.732 mg/g. These results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Corn; Fumonisins; Brazilian corn products. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600011 |
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| Ono,Elisabete Yurie Sataque; Silva,Marcelo da; Ribeiro,Ricardo Marcelo Reche; Ono,Mario Augusto; Hayashi,Luciana; Garcia,Glauco Tironi; Hirooka,Elisa Yoko. |
| In this study the bright greenish-yellow fluorescence test, widely used by the corn milling industry, was compared to the thin-layer chromatography (TLC) and spectrofluorimetry methods for aflatoxin detection in 40 corn samples naturally contaminated by the Aspergillus section Flavi. According to the corn processing industry criteria, all the samples were adequate for human and animal consumption by the bright greenish-yellow fluorescence test, but TLC and spectrofluorimetry analysis detected aflatoxins above the maximum tolerated limit (20 µg/kg) in 7 and 8 samples, respectively. Aflatoxins were detected in 16 (40%) corn samples by TLC, with levels ranging from 4.0 to 54.0 µg/kg (mean 19.97 ± 15.97 µg/kg), and in 25 (62.5%) samples by spectrofluorimetry,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thin-Layer Chromatography; Spectrofluorimetry; BGYF; Aflatoxins; Corn; Mycotoxins. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300025 |
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| Fonseca,Homero. |
| The aim of this paper was to update the sampling plan for analysis of mycotoxins in grains, formerly published by the author. The proposed alterations were based on the acquired experience on its application and on FAO recommendations. This update restricts the scope of the former plan and establishes a sampling plan for analysis of aflatoxin in peanuts and corn, by means of modified formulas, the minimum number of sacks or points (when in bulk) from which incremental samples should be drawn to make a bulk sample. Fractional exponents (square roots) of the formulas proportionally decrease the number of sacks/points to be sampled as the lot size increases. Operating Characteristic (OC) curves developed for in-shell and shelled peanuts and corn as well as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sampling; Peanuts; Corn; Aflatoxin; Analysis. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200001 |
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| Piedade,Fabiana S.; Fonseca,Homero; Glória,Eduardo M.; Calori-Domingues,Antonia; Piedade,Sônia M.S.; Barbin,Décio. |
| The efficiency of segregation, by particle size, in reducing the aflatoxin content of corn lots under the Brazilian conditions was studied. The aflatoxin content, in the corn fractions obtained after sieving thirty contaminated samples, with approximately 3.0 kg each, was determined. The samples were passed through 4.5 mm round-hole sieves and the fractions with particles ³4.5 mm (fraction A) and <4.5 mm (fraction B) and then analyzed for aflatoxins by TLC. The results showed that the distribution of the aflatoxins among the fractions A and B varied from sample to sample. However, the fraction B presented higher content (6 to 1,422 µg/kg) of aflatoxins (P<5%), than samples of fraction A (4 to 389 µg/kg). In spite of that the segregation of this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxin; Corn; Contamination distribution; Segregation; Fractions. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100002 |
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| Piedade,Fabiana Segatti; Fonseca,Homero; Gloria,Eduardo Micotti da; Calori-Domingues,Maria Antonia; Piedade,Sônia Maria Stefano; Barbin,Décio. |
| The aflatoxin distribution in corn fractions obtained after visual segregation for defects in 30 samples, known to be contaminated, was studied. Each sample was passed through a 5.0 mm round holes sieve, graded for defects and then segregated in sound kernels (regular kernels) and non-sound kernels (injured, germinated, fermented, moldy, heated, insect damaged, immature, broken, hollow, fermented up to ¼, discolored, extraneous materials, and injured by other causes), as defined by the Brazilian Official Grading rules for corn. The non-sound kernels showed the highest contamination levels in all samples. The contamination levels of non-sound kernels (20% of total weight) ranged from 23 to 1,365 µg/kg of aflatoxins (B1, B2, G1 and G2) and were higher than... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxins; Corn; Contamination distribution; Visual segregation; Fraction. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000300013 |
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| Registros recuperados: 1.082 | |
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