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| Registros recuperados: 18 | |
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| Monteiro,Alessandra Nardina Trícia Rigo; Bertol,Teresinha Marisa; Kessler,Alexandre de Mello. |
| ABSTRACT: Optimizing nutrient efficiency is essential in order to increase sustainability of pig production systems, especially where the growing demand for food must be met at an affordable cost, without compromising environmental resources. To make this happen, it is necessary to develop efficient methods to accurately estimate the nutritional requirements of animals, as well as develop equipment and systems that allow for applying such expertise in the production system. Estimating the nutritional requirement of pigs through mathematical models, considering several factors that can impact the requirement, is a key factor to reduce the environmental load from pig production. Likewise, feed formulation and feeding programs, can help to achieve this. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet formulation; Environmental impact; Modelling; Nutritional requirement; Pig. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700653 |
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| Costa,Deliane Cristina; Takata,Rodrigo; Silva,Walisson de Souza e; Bessonart,Martin; Gadea,Juan Luis; Magnone,Larisa; Luz,Ronald Kennedy. |
| ABSTRACT Samples of eggs, newly hatched larvae (NHL), and larvae at the end of the lecithotrophic period (eight days after hatching) (LPL) of Lophiosilurus alexandri were collected to determine the amino acid and fatty acid profiles. Crude protein did not change throughout initial development and the concentration of lipids was highest in NHL. The content of the indispensable amino acids (IAA) isoleucine, leucine, and valine decreased in LPL, while in eggs and NHL they remained high and similar in value. The dispensable amino acids (DAA), such as aspartic acid, tyrosine, and glycine, increased in LPL, while alanine decreased. The percentage of neutral lipids increased in LPL. The saturated fatty acid content decreased during ontogeny, while monounsaturated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryonic development; Nutritional requirement; Pacamã. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200215 |
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| Fujimoto,Rodrigo Yudi; Santos,Rudã Fernandes Brandão; Pala,Gabriela; Gallani,Sílvia Umeda; Valladão,Gustavo Moraes Ramos; Morais,Gisele Cavalcante; Lee,James Tony; Sousa,Natalino da Costa; Cunha,Fernanda dos Santos; Maria,Alexandre Nizio; Carneiro,Paulo César Falanghe; Pilarski,Fabiana. |
| Abstract: The objective of this work was to evaluate the effect of dietary arginine concentrations on the health status of Nile tilapia (Oreochromis niloticus) cultivated in cages. The experiment was carried out in a completely randomized design with four treatments (2.3, 2.9, 3.5, and 4.1% arginine in dry matter) and three replicates, in 12 net cages of 8 m3, containing 4,000 sexually reverted tilapia (63±20 g, at 500 fish m-3). Fish productive performance and health were evaluated. Biochemical, hematological, and immunological parameters, as well as the morphological aspects of gills and liver, were evaluated. Arginine inclusion did not cause significant differences in fish growth performance. However, arginine supplementation at 3.5% concentration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Biochemistry; Haematology; Histology; Nutritional requirement. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101105 |
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| Silva,Carine Gregório Machado; Resende,Álvaro Vilela de; Gutiérrez,Aarón Martínez; Moreira,Silvino Guimarães; Borghi,Emerson; Almeida,Gabriela Oliveira. |
| Abstract: The objective of this work was to evaluate macronutrient uptake and export by transgenic corn hybrids under medium and high fertilization levels. For each fertilization level, a randomized complete block design was carried out in the summer crop season, under no-tillage and supplementary irrigation, with four cultivars and four replicates. Plants were sampled throughout the entire cycle and separated into leaves, stalk, husk, cob, and grains for the determination of dry matter mass and accumulation of macronutrients in the different growth stages. Under the high fertilization level, a greater dry matter mass and nutrient uptake were observed, but grain yield was similar to that under the medium fertilization level. The uptake of N, P, Ca, Mg, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Fertilizer use efficiency; High productivity; Luxury consumption; Nutrient absorption; Nutritional requirement. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201363 |
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| Mehri,M; Ghazaghi,M. |
| A uniform design (UD) was used to construct models to explain the growth response of Japanese quails to dietary metabolizable energy (ME), and digestible methionine (dMet) and lysine (dLys) under tropical condition. In total, 100 floor pens with seven birds each were fed 25 UD different diets containing 25 ME (2808-3092 kcal/kg), dMet (0.31-0.49% of diet), and dLys (0.91-1.39% of diet) levels from 7 to 14 d of age. A platform of artificial neural network based on UD (ANN-UD) was generated to describe the growth response of the birds to dietary inputs using random search. Artificial neural networks of body weight gain (BWG) and feed conversion ratio (FCR) were optimized using random search algorithm. The optimization the ANN-UD results showed that maximum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quail chick; Nutritional requirement; Uniform design; Neural network. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300013 |
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| Muñoz,JA; Suckeveris,D; Demuner,LF; Saccomani,APO; Silva,AL; Silva,RT; Faria Filho,DE; Faria,DE. |
| ABSTRACT The objective of this study was to evaluate the effects of dietary nutrient levels on performance, carcass yield, commercial cuts, digestibility and economical viability of broilers from 1 to 42 days of age. During the experiment, 180 COBB 500™ chicks were housed in metal batteries and subjected to a completely randomized design in a 2x3 factorial arrangement, of two sexes and three diets (male, female and mixed), totaling 6 treatments and 6 repetitions of 5 birds each. Data were subjected to statistical analysis and the means were compared using the Tukey test, at 5% probability. The results indicate the effect of sex on performance and commercial cuts, except for breast and thigh fillets, in which males and females showed similar results when... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic viability; Metabolizability; Nutrition; Nutritional requirement; Poultry.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100053 |
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| Oliveira,RG de; Pinheiro,SRF; Castro,MR de; Vieira,DJ; Pires,AV; Abreu,LRA de. |
| ABSTRACT The poultry market has changed due to a higher consumer interest on products with differentiated organoleptic characteristics, making of free-range broiler production a promising activity. This experiment was conducted to determine the digestible lysine requirements of Redbro Cou Nu male and female chickens during the starter phase (one to 21 days of age). Six hundred and thirty Redbro Cou Nu broilers were distributed into 30 pens (21 chickens/pen) according to a randomized complete design in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine and two sexes, with three replicates (pens) per treatments. Diets with increasing digestible lysine levels (8.1, 9.5, 10.9, 12.3 and 13.7 g of digestible lysine per kg of diet) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Feed conversion ratio; Ideal protein; Nutritional requirement. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400483 |
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| Lavres Junior,José; Cabral,Cleusa Pereira; Rossi,Mônica Lanzoni; Nogueira,Thiago Assis Rodrigues; Nogueira,Neusa de Lima; Malavolta,Eurípedes. |
| Castor bean is a nutrient-demanding species, but there is still little information on its micronutrient requirements. The objectives of this study were to evaluate the effects of levels of B (2.5, 12.5 and 25.0 µmol L-1), Cu (0.05, 0.25 and 0.50 µmol L-1), Mn (0.2, 1.0 and 2.0 µmol L-1) and Zn (0.2, 1.0 and 2.0 µmol L-1) in a nutrient solution on plant B, Cu, Mn and Zn concentrations and uptake, vegetative growth and fruit yield of castor bean "Iris", grown in greenhouse. The experiment was arranged in a completely randomized block design with three replicates. The first deficiency symptoms were observed for B, followed by Zn, Cu and Mn. The main changes in the cell ultrastructure due to lack of B were thickening of the cell walls and middle lamellae,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutritional requirement; Ricinus communis L; Cell ultrastructure. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100024 |
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| Crusciol,Carlos Alexandre Costa; Carmeis Filho,Antonio Carlos de Almeida; Fernandes,Adalton Mazetti; Alvarez,Rita de Cássia Félix. |
| ABSTRACT Upland rice cultivars manifest different nutritional demands. A field study was conducted to quantify the extraction, distribution, and removal of micronutrients and silicon by the upland rice cultivars. The experiment was arranged in a randomized complete block-split plot design. Plots consisted of three cultivars (Caiapó – traditional, BRS Primavera – intermediate, and Maravilha – modern) of upland rice. Split-plots consisted of plant samplings, which occurred at 39, 46, 55, 67, 75, 83, 92, 102, 111, 118, and 125 days after emergence (DAE). Up to the end of tillering (46 DAE), all cultivars exhibited low demand for most micronutrients and Si, and took up less than 24 % of the total B, Cu, and Si, but around 31 % of the total Zn. The period of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Nutrient accumulation; Uptake rates; Nutritional requirement. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100522 |
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| Lima,Denise de Castro; Mendes,Nouglas Veloso Barbosa; Corrêa,Márcio Cleber de Medeiros; Taniguchi,Carlos Alberto Kenji; Queiroz,Ronialison Fernandes; Natale,William. |
| Abstract Knowledge on the amounts of nutrients accumulated by pitaya in its different development stages allows defining the periods in which the essential elements are most required, thus contributing to the elaboration of rational fertilization programs for the crop, reducing production costs. This study aimed to evaluate the growth and nutritional requirement of red pitaya, estimating the accumulation of macro and micronutrients by the plants and determining the periods in which the greatest accumulations occur, as well as the relative growth rate and the relative nutrient absorption rate. Pitaya seedlings were planted in pots containing Argissolo Vermelho-Amarelo Eutrófico (Ultisol) and grown in the open air. The experimental design was randomized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineral nutrition; Cactaceae; Nutritional requirement. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000502001 |
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| Campelo,Daniel Abreu Vasconcelos; Salaro,Ana Lúcia; Ladeira,André Luis Fialho; Moura,Lorena Batista de; Furuya,Wilson Massamitu. |
| ABSTRACT A 90-day feeding trial was conducted to estimate the dietary lysine requirement of adult lambari ( Astyanax altiparanae ), based on growth performance, whole-body composition, muscle development, and aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities. Six isoproteic (345.0 g kg−1) and isoenergetic (19.51 MJ kg−1) diets were formulated, and crystalline L-lysine was added to obtain diets with lysine concentrations of 12.13, 13.31, 15.36, 18.79, 19.92, and 23.02 g kg−1 dry diet. Female adult lambari (n = 480; weight of 4.96±0.02 g) were distributed into 24 (70 L) aquaria and fed the experimental diets six times daily. Fish fed 12.13 to 19.92 g kg−1 lysine showed increased weight gain and percent weight gain, and fish from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aminoacid; Carcass quality; Fish nutrition; Lysine; Nutritional requirement. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100103 |
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| Sales,Maykel Franklin Lima; Paulino,Mário Fonseca; Valadares Filho,Sebastião de Campos; Porto,Marlos Oliveira; Couto,Victor Rezende Moreira; Paulino,Pedro Veiga Rodrigues. |
| The objective of this work was to determine macromineral requirements by Zebu steers grazing Brachiaria decumbens supplemented with concentrate. It was used 24 non-castrated steers, at an average age of 7 months and at initial average weight 180 kg. Eight control animals were slaughtered for determining initial body composition. The 16 remaining animals were divided in four four-animal plots, in a complete random design. Each plot received mineral mixture or supplements at the levels 0.75; 1.50 or 2.25 kg/animal/day. The right half-carcass of eight animals, two per group, was dissected in muscle, fat and bones and all body constituents were weighted for determination of empty body weight and body composition. Net requirements of calcium and phosphorus for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium; Nutritional requirement; Phosphorus; Supplementation; Zebu. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200026 |
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| Cardoso Júnior,Adimar; Rodrigues,Paulo Borges; Bertechini,Antônio Gilberto; Freitas,Rilke Tadeu Fonseca de; Lima,Renato Ribeiro de; Lima,Gustavo Freire Resende. |
| Two experiments using Cobb broiler chicks from 8 to 35 days of age were carried out to evaluate the effect of reducing levels of calcium and available phosphorus in diets supplemented with 500 ftu phytase/kg on the performance of the birds, the content of ashes in the tibia, the metabolizable energy of the diet, and the metabolizability of the dry matter and crude protein. It was used 1,404 broiler chicks in the experiment 1 to evaluate feed intake, weight gain, food conversion and percentage of the ashes in the tibia. In the experiment 2, simultaneously carried out with experiment 1, a total of 390 birds were transferred to a metabolism room to determine the metabolizable energy and metabolizability of the dry matter and crude protein. It was used in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enzyme; Minerals; Nutritional requirement. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000600011 |
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| Perine,Taynara Prestes; Marcato,Simara Márcia; Furlan,Antonio Claudio; Grieser,Daiane de Oliveira; Zancanela,Vittor; Stanquevis,Caroline Espejo; Benites,Mariani Ireni; Euzébio,Tainara Ciuffi. |
| ABSTRACT An experiment was conducted to determine the required levels of supplementary vitamin D and calcium in meat-type quail (Coturnix coturnix sp) between 15 and 35 days old. The experiment was a 4 × 4 factorial design with four levels of calcium: 0.42, 0.58, 0.74, and 0.90% and four levels of vitamin D: 1,000; 2,000; 3,000; and 4,000 IU. Body weight and body weight gain increased linearly and feed conversion showed some linear improvement due to increased levels of Ca and vitamin D. The increased vitamin D levels resulted in a linear increase in feed intake. Calcium and vitamin D requirements in meat-type quail between 15 and 35 days of age is greater or equal to 0.90% Ca and greater or equal to 4,000 IU of vitamin D, probably because the experiment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone resistance; Nutritional requirement; Quail nutrition. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001100655 |
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| Lima, Rodrigo Barbosa; Figueiredo-Lima, Denise Fontana. |
| Four types of poly unsaturated fatty acids (PUFA) are essential for all shrimp species, linoleic (LOA, 18:2n-6), alfa-linolenic (ALA, 18:3n-3), eicosapentaenoic (EPA, 20:5n-3) and docosahexaenoic (DHA, 22:6n-3) acids. Moreover, the arachidonic acid (ARA, 20:4n-6), even when present, seems to be, in crustaceans, not so important or yet dispensable. It is relevant knowing that cholesterol as much as PUFA are not well absorbed when not followed by a substantial amount of lecithin, reaching 5% of the ration. The sum of PUFA reaches around 3% of the diet, even varying according to the species, stage and ration type. For Penaeus monodon a complex mathematic model was formulated in order to describe the relationships between the requirements of the cited PUFA.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carotenoids; Cholesterol; Fat-soluble vitamins; Nutritional requirement; Phospholipids; Syndromes.. |
| Ano: 2017 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13996 |
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| Registros recuperados: 18 | |
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