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| Registros recuperados: 113 | |
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| Abreu,Márvio Lobão Teixeira de; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Oliveira,Alexandre Luiz Siqueira de; Santos,Fabrício de Almeida; Pereira,Adriana Aparecida. |
| Foram utilizados 40 leitões machos castrados (peso inicial de 60,43 ± 1,56 kg e peso final de 95,66 ± 3,22 kg) de alto potencial genético para deposição de carne magra na carcaça para avaliar o efeito de níveis de lisina digestível, utilizando-se o conceito de proteína ideal, sobre o desempenho e as características de carcaça. Os animais foram distribuídos em delineamento de blocos ao acaso, com quatro tratamentos, cinco repetições e dois animais por unidade experimental. Os tratamentos consistiram de uma ração basal com 16,48% de PB, suplementada com L-lisina HCL, resultando em rações com 0,70; 0,80; 0,90 e 1,00% de lisina digestível. As rações foram suplementadas com níveis crescentes de aminoácidos sintéticos, resultando em rações com relações... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Carcass; Finishing phase; Genotype; Urea. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007000100007 |
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| Aguilar, Poliana Batista de; Teixeira, Fábio Andrade; Silva, Fabiano Ferreira da; Pires, Aureliano José Vieira; Nascimento, Paulo Valter Nunes; Santos, Otanael Oliveira dos. |
| The objective of this study was to evaluate the effect of different levels of nitrogen on deferred pastures of Urochloa brizantha cv. Marandu, and the implications on the economic viability of production of Nellore heifers. This was a completely randomized design with four treatments (T1 = deferred pasture without nitrogen fertilization; T2 = deferred pasture fertilized with 50 kg N ha-1, T3 = deferred pasture with 100 kg N ha-1, T4 = deferred pasture with 150 kg N ha-1) and four replications (16 fertilized paddocks). First, there were used 48 Nellore heifers, average eight months of age and initial body weight of 178.69 ± 26.67 kg, with three heifers in each paddock, in all treatments, in a continuous grazing system, with variable stocking rate. Only the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic analysis; Deferment; Nitrogen fertilization; Profitability; Urea. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/28375 |
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| Almeida,Rodrigo Estevam Munhoz de; Favarin,José Laércio; Otto,Rafael; Franco,Henrique; Reis,André Froes Borja; Moreira,Lílian Angélica; Trivelin,Paulo. |
| ABSTRACT Intercropping corn and palisade grass is a technique to increase straw production, soil C contents, nutrient cycling and crop yield. However, concerns arise from nitrogen (N) uptake by the intercropping crop causing reduction in the yield of the corn. Our objective was to evaluate N recovery efficiency (NRE), and the N dynamics in the soil-plant system in corn intercropped with palisade grass. A field trial was carried out in Bahia, Brazil, evaluating two cropping systems: corn (monoculture) and corn intercropped with palisade grass sowed between rows on the same day as the corn crop, with four replicates in a completely randomized block design. Nitrogen (150 kg∙ha–1of 15N-urea) was applied at sowing to determine NRE, which means the amounts of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa ruziziensis; Urea; 15N isotope technique; No-till system; Brazilian Cerrado. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400557 |
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| Al-Rasheed,Nouf Mohamed; Fadda,Laila Mohamed; Al-Rasheed,Nawal Mohamed; Attia,Hala; Ali,Hanaa Mahmoud; El-Agami,Hanaa. |
| ABSTRACTThe aim of this work was to investigate whether the free radical scavengers, L-arginine (L-arg) and/or carnosine, either alone, or in combination would modulate tissue injury induced by hypoxia by measuring Fischer's ratio [concentrations of branched chain amino acids (BCAAs)/aromatic amino acids]. Decreased Fischer's ratios and increased malondialdehyde (MDA) led to pathogeneses of many diseases. Rats were injected with sodium nitrite (60 mg/kg) to establish hypoxia. They were treated with L-arg, (200 mg/ kg) and/or carnosine (200 mg/ kg) and their combination 24 and 1 h prior to sodium nitrite intoxication. The results revealed that hypoxia significantly decreased hemoglobin, arginine, citrulline and proline and increased sLDH, MDA , ammonia ,... |
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Palavras-chave: Natural antioxidants; Amino acids; Carnosine; L-arginine; Fisher's ratio; Urea. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500741 |
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| Alves,Marilia; González,Félix; Carvalho,Nelcy; Mühlbach,Paulo; Lima,Verônica; Conceição,Tiago Reis; Wald,Vera. |
| Soybean by-products are currently used in Rio Grande do Sul, Brazil, as a source of protein in dairy cows. However, the high protein breakdown of this feed source in the rumen causes loss of the intrinsic quality of the protein and increases plasma urea with deleterious consequences to animal metabolism. Thermal treatment of soybean can overcome this limitation. The aim of this study was to evaluate the metabolism of dairy cows fed with thermally treated soybean and raw soybean, through the analyses of the metabolic profile of plasma and milk. Twelve Holstein cows in mid-lactation period were studied using four treatments: commercial concentrated of protein, soybean meal, raw soybean and roasted soybean. Protein and urea levels in milk were measured in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metabolic profile; Roasted soybean; Dairy cows; Milk; Protein; Urea. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000100037 |
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| Amorim,Lincoln da Silva; Torres,Ciro Alexandre Alves; Siqueira,Luiz Gustavo Bruno; Fonseca,Jeferson Ferreira da; Guimarães,José Domingos; Carvalho,Giovanni Ribeiro de; Alves,Nadja Gomes; Oliveira,Margarida Maria Nascimento Figueiredo de. |
| The effects of feeding urea on embryo production, quality and developmental stages and follicular status at the beginning of a superovulatory treatment of Toggenburg does fed urea diet were investigated in this study. Eighteen females were randomly allocated to receive diets with: no urea (control, n=8), and 2.4% urea dietary dry matter (n=10) UDM. The embryo recovery was performed at day 7 or 8 of estrus cycle by transcervical technique and classified according to quality and developmental stage. The follicular status was determined by transrectal ultrasonography at the first day of FSH injection. The number and quality of embryos were not affected by dietary urea concentration. Embryos from does treated with 2.4% UDM were recovered at advanced stage.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryo; Follicle; Goat; Superovulation; Urea. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200007 |
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| Antonelli,A.C.; Torres,G.A.S.; Soares,P.C.; Mori,C.S.; Sucupira,M.C.A.; Ortolani,E.L.. |
| Twelve steers were intraruminally administered a high dose (0.5g/kg BW) of urea to study the damage effect of ammonia poisoning on liver and/or muscles. Blood samples were collected to determine ammonia and activities of gammaGT, AST and CK. Eleven steers were successfully poisoned and treated properly, but one succumbed. Poisoned cattle showed high concentration of ammonia, and higher activities of AST and CK. The higher the ammonia, the greater were the activities of AST (r=0.59) and CK (r=0.61). The correlation between AST and CK was high and significant (r=0.80), but not between AST and gammaGT (r=0.19). The activities of AST and CK were higher after the beginning of the convulsive episodes due to ammonia poisoning. Those results showed that occurred... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Ammonia poisoning; Urea; Muscle damage; Liver. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000100002 |
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| Antonelli,Alexandre Coutinho; Mori,Clara Satsuki; Soares,Pierre Castro; Kitamura,Sandra Satiko; Ortolani,Enrico Lippi. |
| Twelve yearling Girolando, rumen-fistulated steers never fed with urea before, were distributed randomly in 2 groups of 6 animals each. Both groups were administered intraruminally a single dose (0.5 g/kg BW) of extruded (G1) or prilled (G2) urea to induce ammonia poisoning. The clinical picture was followed for the next 240 min. Besides the classic signs the present study found 3 new additional sign: dehydration, hypothermia and ingurgitated episcleral veins. Convulsion, considered the definite sign, was seen in 5 out of 6 animals from both groups. One steer (G1) had only fasciculation, while another (G2) developed typical clinical signs, but not convulsion, and recovered spontaneously without treatment. The appearance of clinical signs such as muscle... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urea; Ammonia poisoning; Clinical picture; Cattle. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962004000100010 |
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| Araujo, Hellen Patricia de Oliveira; Paula, Nelcino Francisco de; Martello, Hariany Ferreira; Teobaldo, Ronyatta Weich; Pereira, Luana Barros; Mora, Lays Martins; Valentim, Jean Kaique; Antunes, Hellen Cristina Ferreira. |
| This work was carried out to evaluate the inclusion of urea and tannin in multiple supplements on ingestive behavior of cattle in pasture. The experiment was taken in the Cattle Nutrition pasture of the Experimental Farm of the Federal University of Mato Grosso, in 4 x 4 Latin square design with a factorial arrangement 2 x 2 (with and without urea and with and without tannin). Four Nellore bulls were used, with average weight of 470 kg and an average age of 20 months, randomly divided in: Supplement without urea and without tannin, Supplement without urea and with tannin, supplement with urea and without tannin, and supplement with urea and with tannin. The level of supplementation used was 1% of body weight during the dry period of the year. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Natural additives; Forage; Supplementation; Urea; Tannins. |
| Ano: 2020 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47607 |
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| Balieiro Neto,Geraldo; Reis,Ricardo Andrade; Ruggieri,Ana Cláudia. |
| The objective of this experiment was to evaluate the effects of nitrogen doses (0, 100, 200, 300, and 400 kg ha-1 year-1), with or without dolomitic lime covering application, on the potassium (K) soil content at depths varying form 0 to 5, 5 to 10, and 10 to 20 cm, and the potassium concentration in the plant. The experiment was carried out in a rhodic ferralsol with a slightly rolling relief, in a 5 × 2 factorial arrangement, in a complete randomized block design, with four replications. Nitrogenated fertilization caused a linear increase in the potassium concentration in the plant and also in the mineral content in the 0-5 cm soil layer. An effect of competitive inhibition occurred between the potassium and calcium absorption, and potassium and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral nutrition; Soil fertility; Urea; Urochloa. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700002 |
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| 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... |
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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 |
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| Bonilla C,Carmen R; Sánchez O,Manuel S.; Perlaza,Diego F. |
| En el Centro Experimental de la Universidad Nacional de Colombia sede Palmira se evaluó el prendimiento de estacas apicales y basales de Stevia rebaudiana en tres sustratos de enraizamiento (carbonilla-arena, carbonilla-compost y arena-compost) y tres fuentes de nitrógeno (urea 46%N, compost 1.5%N y gallinaza 1% N). El mejor método de propagación fue la estaca apical en sustrato carbonilla-arena 1:1, volumen; las fuentes de nitrógeno no presentaron diferencias significativas en la acumulación de materia seca de hojas. Se diferenciaron los siguientes periodos fenológicos: Emergencia: 6 días después de la siembra (dís), Estado vegetativo: 17 dias, Floración: 71 dís, Fructificación: 115 dís, Senescencia: 169 dís y Rebrote: 201 dís |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hierba dulce; Carbonilla; Arena; Urea; Carbonilla; Arena. |
| Ano: 2007 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122007000300004 |
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| Brunetto,Gustavo; Ceretta,Carlos Alberto; Melo,George Wellington Bastos de; Girotto,Eduardo; Ferreira,Paulo Ademar Avelar. |
| This study was carried out to evaluate the yield, total N content in leaves and must composition of grapes from the Cabernet Sauvignon variety subjected to the application of urea and organic compost. Cabernet Sauvignon grapevines in Rosário do Sul, RS, Brazil, in 2008, 2009 and 2010 were subjected to annual application of 40 kg N ha-1 in the form of organic compost and urea, and compared to unfertilized grapevines. In the 2008/09, 2009/10 and 2010/11 crop seasons, leaves were collected for analysis of total N content. At maturation of the grapes, the yield and quality attributes of the must were evaluated. The application of N sources, especially organic compost, increased the N content in the whole leaf at full flowering. Application of organic compost... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urea; Organic compost; Leaf analysis; Must quality; Vitis vinifera. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000400015 |
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| Buso,W.H.D.; França,A.F.S.; Miyagi,E.S.. |
| The bromatological composition and in vitro dry matter digestibility of millet cultivars were assessed for different nitrogen doses and two sowing seasons in the Ceres municipality of Goiás state, Brazil. The treatments consisted of three millet cultivars (ADR-7010, ADR-500 and BRS-1501), four nitrogen (N) doses (0, 50, 100 and 200kg ha-1 of N) and two sowing seasons. Three replicates and a randomised block design with a 3 x 4 x 2 factorial scheme were used. Two cuttings were performed in each season when plants reached an average height of 0.70 cm. No significant interactions were observed between or among cultivars for N doses and dry matter (DM), crude protein (CP), neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents. The DM, CP, NDF... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fibres; Forage; Dry matter; Pennisetum glaucum; Protein; Urea. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000300887 |
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| Cartes,Paula; Jara,Alejandra A; Demanet,Rolando; Mora,María de la Luz. |
| Incubation studies were carried out to evaluate the effect of temperature and urea supply level on both the urease activity and the kinetics of N mineralization in two Andisols of Southern Chile. Our results showed that urease activity was higher in Piedras Negras soil (PNS) than Freiré soil (FS) at 24 and 48 h, and the enzyme was activated when the temperature increased from 5 to 21 °C. Urease activity followed a simple Michaelis-Menten kinetics. In PNS, the Michaelis Menten constant (Km) decreased, whereas the maximum enzyme reaction velocity (Vmax) and the catalytic efficiency increased when the temperature was raised up to 21 °C at 24 and 48 h of soil incubation. In FS, urease activity was the highest at 24 h, and it decreased at 48 h as a consequence... |
| Tipo: Journal article |
Palavras-chave: Urease activity; N mineralization; Urea; Andisols. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912009000100006 |
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| Registros recuperados: 113 | |
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