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| Registros recuperados: 9.409 | |
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| Teixeira,Anita Fernanda dos Santos; Kemmelmeier,Karl; Marascalchi,Matheus Nicoletti; Stürmer,Sidney Luiz; Carneiro,Marco Aurélio Carbone; Moreira,Fatima Maria de Souza. |
| ABSTRACT Arbuscular mycorrhizal fungi (AMF) interact symbiotically with most plant species, facilitating revegetation of areas under rehabilitation. The aim of this study was to evaluate the inoculum potential, density, and diversity of AMF spores in five environments, as well as the relation of species with soil properties. Soil samples were collected in five environments in a mining area and its surroundings in the Quadrilátero Ferrífero, Minas Gerais (Brazil): tailings piles in rehabilitation with grass, canga, Cerrado, native forest, and eucalyptus plantation; these samples were subjected to chemical and physical analyses. Spores were directly extracted from field samples and from trap cultures (TCs) established in two locations in the Southeast and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tailings piles; Glomeromycota; Ironstone; Rehabilitation.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500511 |
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| Dalpisol,Maristela; Serrat,Beatriz Monte; Motta,Antonio Carlos Vargas; Poggere,Giovana Clarice; Bittencourt,Simone; Barbosa,Julierme Zimmer. |
| ABSTRACT In Paraná, most of the sludge generated in sewage treatment plants is subjected to the prolonged alkaline stabilization process. Although it is known that the alkaline sewage sludge contains micronutrients such as Zn, Cu and Mn, little is known about the availability of these elements in soils treated with this type of sewage sludge. Thus, the objective of the study was to evaluate the influence of alkaline sewage sludge from Paraná on Zn, Cu and Mn availability in soils. Twenty sewage treatment plants were selected throughout Paraná, where alkaline sewage sludge and the most representative agricultural soil of the each region were collected. Each soil was incubated for 60 days with alkaline sewage sludge rates (0, 10, 20, 40, and 80 Mg ha-1) from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acid soils; Organic residues; Recycling; Micronutrients.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100081 |
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| Miranda,Rafaela Marques de; Dias,Denise Cunha Fernandes dos Santos; Picoli,Edgard Augusto de Toledo; Silva,Patrícia Pereira da; Nascimento,Warley Marcos. |
| ABSTRACT The adequate time for carrot seed harvest influences its physiological quality. The objective of this study was to evaluate physiological, anatomical and histochemical changes in carrot seeds harvested at different stages of development and to establish the most appropriate harvest time. Secondary umbels were harvested at 14, 21, 28, 35, 42, 49, 56 and 63 days after anthesis (DAA). For seed anatomical and histochemical characterization, sections were stained with Toluidine blue stain, Xylidine Ponceau, Lugol’s iodine, Sudan Black B and submitted to polarized light. Seed moisture content, seed dry matter, germination, first count, emergence percentage and emergence speed index of seedlings were evaluated. Cultivar Brasília carrot seeds at 14 DAA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maturity; Harvest; Reserve substances; Germination; Vigor. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200169 |
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| Santos,Adriano dos; Amaral Júnior,Antônio Teixeira do; Kurosawa,Railan do Nascimento Ferreira; Gerhardt,Ismael Fernando Schegoscheski; Fritsche Neto,Roberto. |
| ABSTRACT Nitrogen is essential for sustaining life on the planet, and it is the most important nutrient for obtaining high agricultural production. However, their use leads to the release of nitrous oxide with a global warming potential 296 times higher than the CO2 molecule, making it a challenge to reduce their use in agriculture. The objective of this research was to identify efficient popcorn inbred lines and responsive nitrogen use and exhibit a good expansion volume. For this, 29 inbred lines from the Germplasm Collection of Darcy Ribeiro North Fluminense State University (UENF) were evaluated at two contrasting levels of nitrogen availability (low and ideal) at two representative locations in the north and northwest of the state of Rio de Janeiro,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Multivariate analysis; Abiotic stress; G x E interaction.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100022 |
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| Esteves,Lucas Antonio Costa; Oliveira,Newton Tavares Escocard de; Huepa,Laura Marcela Diaz; Ferreira,Silvia Letícia; Castilha,Leandro Dalcin; Pozza,Paulo Cesar. |
| ABSTRACT Corn is one of the primary ingredients in swine diets, but there is a variation in its chemical composition and metabolizable energy (ME) content. Therefore, faster methods are required that can determine more accurate ME values to improve piglet diets. This study determined and predicted the ME of corn from first and second harvests for piglets. Two experiments were conducted to determine the ME values for 18 corn batches, evaluating corn from first and second harvests. The corn batches were analysed to determine the concentration of dry matter (DM), starch (ST), neutral detergent fiber (NDF), acid detergent fiber (ADF), crude protein (CP), ether extract (EE), ash, calcium (Ca), phosphorus (P) and gross energy (GE). To determine the ME values, 40... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metabolizability coefficients; Prediction equations; Swine. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600683 |
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| Souza,Taylor Lima de; Guelfi,Douglas Ramos; Silva,André Leite; Andrade,André Baldansi; Chagas,Wantuir Filipe Teixeira; Cancellier,Eduardo Lopes. |
| ABSTRACT The market of stabilized, slow and controlled release nitrogen (N) fertilizers represents 1% of the world fertilizer consumption. On the other hand, the increase in availability, innovation and application of these technologies could lead to the improvement of N use efficiency in agroecossystems and to the reduction of environmental impacts. The objective of this study was to quantify agronomic efficiency relative index, ammonia volatilization, and CO2 emissions from conventional, stabilized and controlled release N fertilizers in corn summer crop. The experiment was carried out in a corn crop area located in Lavras, state of Minas Gerais, Brazil, without irrigation. All treatments were applied in topdressing at rate of 150 kg ha-1 N. N-NH3 losses... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CO2; NH3 loss; No-tillage; Zea mays L.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500494 |
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| Feddern,Vivian; Prá,Marina Celant De; Mores,Rúbia; Nicoloso,Rodrigo da Silveira; Coldebella,Arlei; Abreu,Paulo Giovanni de. |
| ABSTRACT Eggs are one of nearly perfect protein foods, offering nutrients of great biological value. However, during storage, egg albumen and yolk components may alter and deteriorate egg quality. Therefore, the aim of this work was to assess egg quality during 9-week storage. Parameters such as Haugh unit, weight loss, egg width and length, specific gravity, yolk and albumen dimensions and their pH were evaluated weekly. A total of 270 eggs (n=5) collected from two different hen strains were evaluated under room (20 to 35 °C in summer; 11.2 to 29.7 °C in autumn) and refrigerated (0 to 5 °C in summer; -3.1 to 6.5 °C in autumn) temperatures. For storage time, an unfolding analysis was accomplished by regression analysis using orthogonal polynomials. As a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weight loss; Shell color; Haugh unit; Yolk index.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300322 |
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| Barbosa,Julierme Zimmer; Poggere,Giovana Clarice; Dalpisol,Maristela; Serrat,Beatriz Monte; Bittencourt,Simone; Motta,Antonio Carlos Vargas. |
| ABSTRACT Although it is known that alkalinized sewage sludge raises the pH of acid soils, there is limited knowledge regarding its effects on other soil fertility indicators, such as P and K availability and soil organic C content. Thus, the goal of this study was to evaluate how the application of alkalinized sewage sludge affects the fertility of acid soil. Twenty sewage treatment plants were selected throughout Paraná State (Brazil), and samples of alkalinized sewage sludge and samples of the most representative agricultural soil of the region were collected (covering soils with medium, clayey or very clayey texture). Each soil was incubated for 60 days with doses of sewage sludge (0, 10, 20, 40, and 80 Mg ha-1) from its region and equivalent doses of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sanitation waste; Liming; Phosphorus recovery; Nutrient source; Organic matter.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500483 |
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| Motta,Paulo Emílio Ferreira da; Siqueira,José Oswaldo; Ribeiro,Bruno Teixeira; Silva,Sérgio Henrique Godinho; Poggere,Giovana Clarice; Curi,Nilton. |
| ABSTRACT In the fertility management of highly weathered-leached Brazilian Oxisols, P is the most limiting macronutrient. A greenhouse experiment was conducted with the objective to evaluate the influence of the interaction between P doses, mycorrhizal inoculation and historical land use on Urochloa decumbens growth and P uptake in four Oxisols with contrasting chemical, physical and mineralogical properties. The plants were cultivated in plastic pots containing 4 kg of soil in a completely randomized design, four replications and 2x2x2 factorial scheme: with two P doses; with and without mycorrhizal inoculation; soils cultivated for long periods and non-cultivated (under native vegetation). There were two plantings of ten weeks each. Shoot dry mater,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Long-term cultivation; Latosols; Available P.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200209 |
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| Silva,Sérgio Henrique Godinho; Teixeira,Anita Fernanda dos Santos; Menezes,Michele Duarte de; Guilherme,Luiz Roberto Guimarães; Moreira,Fatima Maria de Souza; Curi,Nilton. |
| ABSTRACT Determination of soil properties helps in the correct management of soil fertility. The portable X-ray fluorescence spectrometer (pXRF) has been recently adopted to determine total chemical element contents in soils, allowing soil property inferences. However, these studies are still scarce in Brazil and other countries. The objectives of this work were to predict soil properties using pXRF data, comparing stepwise multiple linear regression (SMLR) and random forest (RF) methods, as well as mapping and validating soil properties. 120 soil samples were collected at three depths and submitted to laboratory analyses. pXRF was used in the samples and total element contents were determined. From pXRF data, SMLR and RF were used to predict soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil analyses; Spatial prediction; Proximal sensor.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600648 |
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| Behling Neto,Arthur; Reis,Rafael Henrique Pereira dos; Cabral,Luciano da Silva; Abreu,Joadil Gonçalves de; Sousa,Daniel de Paula; Sousa,Fabiano Gama de. |
| ABSTRACT Sorghum is a crop that stands out as an alternative to corn due to lower soil fertility demand and increased tolerance to drought. Lack of information about the qualitative behaviour of sorghum hinders the recommendation of different purpose sorghum cultivars. The goal was to evaluate the chemical composition and in vitro digestibility of different purpose sorghum cultivar silages, at two cropping seasons. The trial was conducted at the Plant Production Department, Federal Institute of Education, Science and Technology of Rondônia, Colorado do Oeste campus, and chemical analyses and in vitro incubation were performed at the Laboratory of Animal Nutrition, Federal University of Mato Grosso, Cuiabá campus. The experimental design was a randomized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbohydrate and protein fractions; Chemical composition; Ensiling; In vitro gas production.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300288 |
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| Mellis,Estêvão Vicari; Casagrande,José Carlos; Soares,Marcio Roberto. |
| ABSTRACT Although nickel (Ni) has both important potential benefits and toxic effects in the environment, its behavior in tropical soils has not been well studied. Nickel adsorption-desorption in topsoil and subsoil samples of an acric Oxisol was studied at three pH values (from 3.0 to 8.0). Adsorption-desorption isotherms were elaborated from experiments with increasing Ni concentration (5 to 100 mg L-1), during 0, 4, and 12 weeks, using CaCl2 0.01 and 0.1 M as electrolytic support in order to also verify the effect of Ni-soil time contact and of ionic strength on the reaction. Experimental results of Ni adsorption fitted Langmuir model, which indicated that maximum Ni adsorption (71,440 mg kg-1) occurred at subsoil, after 12 weeks. Nickel affinity (KL)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorption; Bioavailability; Soil pollution; Heavy metal.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100032 |
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| Sanches,Arthur Carniato; Gomes,Eder Pereira; Azevedo,Edéria Pereira Gomes. |
| ABSTRACT In the Brazilian Cerrado, canola is grown in the off-season. During this period, rainfall is insufficient to ensure the maximum crop yield, and irrigation is needed. Canola has a high demand for nitrogen; thus, the application of this nutrient is essential for obtaining a good crop yield. Therefore, a study was conducted at the Federal University of Grande Dourados in 2012 and 2013 using a randomized block split-plot design with four repetition treatments in the plot that consisted of three irrigation frequencies (no irrigation, weekly irrigation and irrigation three times per week). Subplots received different doses of nitrogen: 0, 30, 60, 90 and 120 kg ha- 1 in 2012 and 0, 60, 120, 180 and 240 kg ha-1 in 2013. In both periods, the irrigation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brassica napus L.; Oil seeds; Tensiometry. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000400367 |
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| Galati,Vanessa Cury; Muniz,Ana Carolina Corrêa; Guimarães,João Emmanuel Ribeiro; Inestroza-Lizardo,Carlos Orlando; Mattiuz,Claudia Machado Fabrino; Mattiuz,Ben-Hur. |
| ABSTRACT Cut flowers deteriorate quickly and require postharvest technologies to increase their durability, which is usually around 8 days. Due to the scarce information related to postharvest physiology of Alstroemeria cut flowers, this study aimed to verify the best dose of 1-methylcyclopropene (1-MCP) to the postharvest conservation of inflorescences of Alstroemeria cv. Ajax, considering the factors associated with floral senescence and loss of the decorative life. The stems were submitted to four doses of 1-MCP (0; 100; 250; 500 ppb), then placed in containers with distilled water and stored at room temperature (22 ºC). The treatments were performed in triplicate containing three stems per replicate. The evaluations were performed every three days for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethylene; Longevity; Pigments; Enzyme activity.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200181 |
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| Zandonadi,César Henrique Souza; Albuquerque,Carlos Juliano Brant; Freitas,Rogério Soares de; Paula,Alyne Dantas Mendes de; Clemente,Marina Alves. |
| ABSTRACT Brazilian off-season cropping is increasing the production of cereals, particularly in the Brazilian savannah. Sorghum has been widely used for its grain production capacity and dry matter. Several hybrids are commercially available, each with its own peculiar nutrient absorption capacity. Thus, this study analyzed the agronomic characteristics and nutrient exportation in grain sorghum hybrids sown on different dates. The experiment was conducted at the Paulista Agency Regional Center of Agricultural Technology (APTA) in the city of Votuporanga, São Paulo. The experiment was conducted in a randomized block design with four replications and 4 hybrids. Sorghum hybrids (50A10, 50A50, BUSTER and 1G282) were the different treatments sown on four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor L.; Production system; Grain; Nutrient content. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100007 |
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| Silva,Ana Veruska Cruz da; Amorim,Julie Anne Espíndola; Vitória,Marina Ferreira da; Ledo,Ana da Silva; Rabbani,Allivia Rouse Carregosa. |
| ABSTRACT The state of Sergipe is the largest mangaba producer, which is a fruit native to Brazil, and has cultural, social and economic importance in its area of occurrence. It is an endangered species due to human actions, and despite its economic potential, there are still no commercial plantations. The study was carried out in order to characterize trees, fruits and the genetic diversity of natural populations of mangaba in Sergipe, Brazil. Fruits from Abaís Beach/Estância (AB) presented, on average, twice the vitamin C content (414.81 mg of vit. C/100g), when compared with the others. The use of ISSR primers was efficient in estimating the genetic similarity of populations. The primers clustered the populations of mangaba according to their origin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hancornia speciosa Gomes; Postharvest; Molecular markers; Variability. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300255 |
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| Amabile,Renato Fernando; Faleiro,Fábio Gelape; Capettini,Flávio; Peixoto,José Ricardo; Sayd,Ricardo Meneses. |
| ABSTRACT Recently, researches have shown that the Brazilian savannah has a great potential to supply the demand for barley grains. The purpose of this study was to assess the genetic variability in 39 elite barley (Hordeum vulgare L.) genotypes based on the agro-morphological traits of a crop irrigated in the savannah system. An irrigation experiment in the design of complete randomized block with four replicates was conducted at Federal District - Brazil. The evaluated traits were: distance from the last knot to the rachis, distance from the flag leaf to rachis, spike length, number of grains by ear, flag leaf area, plant height, silking, lodging, grain yield, thousand-seed weight, protein content and grain commercial classification. After using analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic diversity; Hordeum vulgare L.; Genetic resources; Savannah. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200147 |
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| Vicente,Marcelo Rossi; Mantovani,Everardo Chartuni; Fernandes,André Luís Teixeira; Neves,Júlio César Lima; Figueredo,Edmilson Marques; Delazari,Fábio Teixeira. |
| ABSTRACT The development of coffee plant root system changes when subjected to drip irrigation and fertigation. This work aimed to evaluate the effects of different levels of fertigation on the development of coffee root system by drip irrigation in western Bahia. The experiment was carried out with Catuaí Vermelho IAC 144 coffee plants, of about 3.5 years of age, in the “Café do Rio Branco” farm, located in Barreiras - BA, and consisted of a complete randomized blocks design with 3 replicates. Treatments consisted of three levels of nitrogen and potassium fertilization (900/800, 600/500 and 300/250 kg ha-1 year-1 N and K2O), weekly distributed, by means of fertigation, throughout the process. After the fourth harvest, coffee root system was evaluated, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; Irrigation; Nitrogen fertilization; Potassium fertilization.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000100072 |
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| Registros recuperados: 9.409 | |
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