Consulta: subjectFacets:"Requirement"
Registros recuperados: 26
Data/hora: 13/06/2024 02:37:02

Influencia de la suplementación con selenito de sodio sobre variables digestivas en corderos
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Razo Rodríguez, Oscar Enrique del.
El Se inorgánico en ovinos ha provocado cambios ruminales (pH, AGV y población microbiana)  y en digestibilidad de algunos nutrientes; por lo que posiblemente estos cambios puedan influir  sobre el requerimiento de Se para corderos en crecimiento. Por ello se realizó un experimento en  dos cuadros latinos repetidos con arreglo factorial de tratamientos, usando 8 corderos (43.2 ±  4.7 kg de peso) con cánula ruminal y duodenal. Se midieron cambios en fermentación ruminal,  digestibilidad de nutrientes y balance de Se provocados por la suplementación con selenito de  sodio (cuatro niveles: 0, 200, 500 y 800 µg Se kg-1 MS) en dietas con 69 y 50% de grano de  maíz. La concentración de Se en las dietas fue 220 ± 28 µg Se kg-1 MS. En líquido ruminal se  observó:...
Tipo: Tesis
Palavras-chave: Selenio; Grano; Requerimiento; Fermentación ruminal; Digestibilidad; Doctorado; Ganadería; Selenium; Grain; Requirement; Ruminal fermentation; Digestibility.
Ano: 2008
URL: http://hdl.handle.net/10521/1213

Influencia de la suplementación con selenito de sodio sobre variables digestivas en corderos
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: del Razo Rodríguez, Oscar Enrique.
El Se inorgánico en ovinos ha provocado cambios ruminales (pH, AGV y población microbiana)  y en digestibilidad de algunos nutrientes; por lo que posiblemente estos cambios puedan influir  sobre el requerimiento de Se para corderos en crecimiento. Por ello se realizó un experimento en  dos cuadros latinos repetidos con arreglo factorial de tratamientos, usando 8 corderos (43.2 ±  4.7 kg de peso) con cánula ruminal y duodenal. Se midieron cambios en fermentación ruminal,  digestibilidad de nutrientes y balance de Se provocados por la suplementación con selenito de  sodio (cuatro niveles: 0, 200, 500 y 800 µg Se kg-1 MS) en dietas con 69 y 50% de grano de  maíz. La concentración de Se en las dietas fue 220 ± 28 µg Se kg-1 MS. En líquido ruminal se  observó:...
Palavras-chave: Selenio; Grano; Requerimiento; Fermentación ruminal; Digestibilidad selenium; Grain; Requirement; Ruminal fermentation; Digestibility.
Ano: 2012
URL: http://hdl.handle.net/10521/806

Influencia de la suplementación con selenito de sodio sobre variables digestivas en corderos
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: del Razo Rodríguez, Oscar Enrique.
El Se inorgánico en ovinos ha provocado cambios ruminales (pH, AGV y población microbiana)  y en digestibilidad de algunos nutrientes; por lo que posiblemente estos cambios puedan influir  sobre el requerimiento de Se para corderos en crecimiento. Por ello se realizó un experimento en  dos cuadros latinos repetidos con arreglo factorial de tratamientos, usando 8 corderos (43.2 ±  4.7 kg de peso) con cánula ruminal y duodenal. Se midieron cambios en fermentación ruminal,  digestibilidad de nutrientes y balance de Se provocados por la suplementación con selenito de  sodio (cuatro niveles: 0, 200, 500 y 800 µg Se kg-1 MS) en dietas con 69 y 50% de grano de  maíz. La concentración de Se en las dietas fue 220 ± 28 µg Se kg-1 MS. En líquido ruminal se  observó:...
Palavras-chave: Selenio; Grano; Requerimiento; Fermentación ruminal; Digestibilidad selenium; Grain; Requirement; Ruminal fermentation; Digestibility.
Ano: 2012
URL: http://hdl.handle.net/10521/905

Dietary levels of potassium for broiler chickens
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Oliveira,JE; Albino,LFT; Rostagno,HS; Páez,LE; Carvalho,DCO.
Three experiments were conducted to determine the nutritional requirements of potassium (K) for male Ross broiler chickens, from 8 to 21, 22 to 42 and 43 to 53 days of age. The following parameters were evaluated: body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR). In each experiment, a completely randomized experimental design was used, with six treatments (K levels), and six, eight and eight numbers of replicates, and eight, five and four birds per pen, respectively. The experimental diets were basal diets deficient in K but supplemented with K carbonate to result in levels of 0.30, 0.44, 0.58, 0.72, 0.86 and 1.00% K. Estimated requirements for BWG were 0.628, 0.714 and 0.798% K, for the periods 8-21, 22-42 and 43-53 d, respectively.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Ion; Mineral; Potassium; Requirement; Weight gain.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100006

Effects of Dietary Zinc Levels on the Growth Performance, Organ Zinc Content, and Zinc Retention in Broiler Chickens
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Zhang,TY; Liu,JL; Zhang,JL; Zhang,N; Yang,X; Qu,HX; Xi,L; Han,JC.
ABSTRACT The objective of this study was to investigate the optimal zinc (Zn) requirement of broiler chickens based on Zn retention. On the day of hatch, 350 male Ross 308 broilers were randomly assigned to seven treatments with five replicates of ten birds each. Zinc was supplemented as ZnSO4·7H2O at 0, 20, 40, 60, 80, 100, or 120 mg/kg in the starter diet (fed from 1 to 21 d of age) and at 0, 16, 32, 48, 64, 80, or 96 mg/kg in the grower diet (fed from 22 to 42 d of age). The analyzed Zn levels were 34.98 and 27.57 mg/kg in the basal starter and grower diets, respectively. Supplemental Zn levels did not influence body weight gain, feed intake, feed conversion ratio, or liver Zn content of broilers at 21 and 42 d of age (p&gt;0.05). Tibia ash Zn content...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Growth; Requirement; Retention; Zinc.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100127

Digestible lysine requirements of broilers
Provedor de dados: Revista Brasileira de Ciência Avícola
Autores: Bernal,LEP; Tavernari,FC; Rostagno,HS; Albino,LFT.
Modern broilers have been submitted to continuous genetic improvement, and therefore, their nutritional requirements must be constantly updated to ensure their performance. Two experiments were carried out to evaluate different digestible lysine levels for starter (1021 days) and grower (22-35 days) phases. The experiments were carried out with male and female Cobb 500 broilers, distributed according to a randomized block experimental design in a 5x2 factorial arrangement (5 increasing digestible lysine levels x 2 sexes), totaling 10 treatments, with 8 replicates of 22 and 20 birds during the starter and grower phase, respectively. Digestible lysine levels of 1.06, 1.12, 1.18, 1.24, and 1.30 were used in the starter diets (10-21 days) and 0.9, 0.98, 1.04,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestible lysine; Requirement; Performance; Broiler.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100007

Effect of dietary levels of methionine + cystine on performance of broiler breeders
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Gomes,Paulo Cezar; Lima,Cristina Amorim Ribeiro de; Calderano,Arele Arlindo; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira.
The objective of this experiment was to evaluate levels of methionine + cystine levels for broiler breeders from 40 to 60 weeks of age. It was used 288 Cobb broiler breeders, distributed in a randomized experimental design with six levels of methionine+ cystine in the diets (0.39; 0.47; 0.55; 0.63; 0.71 and 0.79%), eight repetitions and six breeders per experimental unit. The diets were isocaloric and isoprotein (2,850 kcal ME/kg and 12.58% CP) and oferred at a fixed amount (155 g) per bird. For the entire studied period, by using polynomial analysis, it was observed a quadratic effect of methionine + cystine levels on the percentage of egg production, on number of eggs per hen housed, on number of eggs per hen and egg weight. There was also a linear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eggs; Requirement; Sulfur amino acid.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500011

Available phosphorus levels in diets for swine from 15 to 30 kg genetically selected for meat deposition
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Saraiva,Alysson; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Abreu,Márvio Lobão Teixeira de; Silva,Francisco Carlos de Oliveira; Santos,Fabrício de Almeida.
With the objective to evaluate available phosphorus levels in diets for swine genetically selected for meat deposition, sixty commercial hybrid pigs were used, being 30 castrate males and 30 females, with initial weight of 15.00 ± 0.41 kg, distributed in a completely randomized experimental design, with six treatments, five replications and two animals (1 male and 1 female) per experimental unit. The treatments were composed of a basal diet and other five diets obtained through basal diet supplementation with dicalcium phosphate to obtain six AP levels (0.114; 0.221; 0.328; 0.435; 0.542 and 0.649%). The available phosphorus levels promoted a linear increase in the daily feed intake. Daily weight gain and feed conversion showed a quadratic behavior...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotype; Minerals; Nutrition; Requirement.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000200013

Available phosphorus for 15- to 30-kg pigs kept in hot environment
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Alebrante,Leandro; Donzele,Juarez Lopes; Oliveira,Rita Flavia Miranda de; Saraiva,Alysson; Guimarães,Simoni Eliza Facioni; Ferreira,Aloízio Soares; Silva,Francisco Carlos de Oliveira; Abreu,Márvio Lobão Teixeira de.
This experiment was conducted to determine the requirement of available phosphorus (aP) for pigs kept in hot environment. Seventy-two pigs (36 castrated males and 36 females) with initial weight of 15.10±0.31 kg were allotted in a completely randomized block design with six treatments (0.107, 0.214, 0.321, 0.428, 0.535, and 0.642% of aP), six replicates and two pigs (1 castrated male and 1 female) per experimental unit. Pigs were kept in a hot environment with temperature of 34.1±0.8 ºC. The levels of aP influenced the daily weight gain, which increased quadratically up to the estimated level of 0.477%, and feed conversion, which improved quadratically up to the estimated level of 0.457%. The levels of aP also influenced the content of phosphorus in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotype; Minerals; Requirement; Swine; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200016

Dietary levels of lysine for male broilers from 23 to 36 days of age: performance and body composition
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Trindade Neto,Messias Alves da; Toledo,Ana Louise de; Takeara,Paula; Kobashigawa,Estela; Donato,Daniella Carolina Zanardo; Albuquerque,Ricardo de.
One thousand and fifty (1,050) Ross male broilers from 23 to 36 days of age were used to evaluate the dietary effects of levels of lysine. It was used a random block design with 5 levels of digestible lysine (0.95; 1.00; 1.05; 1.10 and 1.15%). Each level was applied to seven replicates and the experimental unit was composed of 30 birds. Diets were offered in seven replicates and the experimental unit was represented by 30 birds. Weight gain, feed intake, feed conversion, carcass traits, cut yields, composition and deposition of body nutrients were evaluated. The concentration of 1.09% of digestible lysine optimized performance without significant effects on feed intake. Carcass traits and cut yields had no significant differences among levels of lysine. On...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestible amino acid; Nutrient depositions; Nutrition; Requirement.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300020

Available phosphorus levels in diets for 30 to 60 kg female pigs selected for meat deposition by maintaining calcium and available phosphorus ratio
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Saraiva,Alysson; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Abreu,Márvio Lobão Teixeira de; Silva,Francisco Carlos de Oliveira; Vianna,Rafael Alves; Lima,Anderson Lazarini.
With the objective to evaluate levels of available phosphorus (aP) in diets for pigs selected for meat deposition by maintaining the calcium and available phosphorus ratio, it was used 50 commercial hybrid female pigs with initial weight of 30.32 ± 0.29 kg, distributed in a complete randomized experimental design, with five treatments, five replicates, and two animals per experimental unit. Treatments were composed of a corn-soybean meal basal diet and four diets obtained by supplementation of basal diet with dicalcium phosphate, resulting in diets with 0.144; 0.224; 0.304; 0.384 and 0.464% of aP. Calcium levels were adjusted by varying the quantities of limestone in the diets. There was no effect of aP on both daily feed intake and feed conversion. Levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth phase; Phosphorus; Performance; Requirement.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300017

Digestible lysine for barrows of genetic lines selected for meat deposition from 60 to 100 days of age
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Haese,Douglas; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Saraiva,Alysson; Oliveira Silva,Francisco Carlos de; Kill,João Luís; Abreu,Márvio Lobão Teixeira de.
In order to evaluate the effects of dietary digestible lysine levels on performance and carcass traits of two genetic lines of pigs selected for meat deposition, from 60 to 100 days of age, a total of 120 crossbred barrows, with initial average body weight of 25.42 ± 2.08 kg were used. Pigs were allotted in a complete randomized block design, within a 4 × 2 factorial arrangement (four digestible lysine levels: 0.90, 1.00, 1.10, and 1.20%, and two genetic lines: A and B), with five replicates and three pigs per pen, which was the experimental unit. There was no interaction between genetic and digestible lysine levels for any variable of performance and carcass traits assessed. There was also no effect of digestible lysine levels in feed intake, body weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Growing; Nutrition; Requirement.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900014

Digestible lysine and organic zinc for male broiler from 1 to 11 days of age: performance and body composition
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Trindade Neto,Messias Alves da; Namazu,Lilian Bernadete; Kobashigawa,Estela; Takeara,Paula; Donato,Daniella Carolina Zanardo; Albuquerque,Ricardo de.
This study evaluated levels of digestible lysine and organic zinc for male Ross strain broilers from 1 to 11 days of age. It was used 1,050 chicks distributed in randomized block design, in 5 × 2 factorial scheme, with seven repetitions of 15 birds per experimental unit. The dietary concentrations of digestible lysine were 0.90; 1.00; 1.10; 1.20; and 1.40% combined with 43 and 253 ppm zinc chelate. The diets contained 2,965 ± 18 kcal/kg of apparent metabolizable energy (AME) and 21.48 ± 0.18% of CP. It was determined chemical composition, protein, lipid, mineral and water depositions on carcass and empty body. There was no interaction among the factors digestible lysine and organic zinc. Effect of zinc concentration increase was observed on greatest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Nutrient deposition; Nutrition; Requirement; Zinc.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300019

Response of laying hens to methionine + cystine intake by dilution technique
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Bendezu,Hilda Cristina Palma; Sakomura,Nilva Kazue; Hauschild,Luciano; Silva,Edney Pereira da; Dorigam,Juliano Cesar de Paula; Malheiros,Euclides Braga; Fernandes,João Batista Kochenborger.
The objective of this study was to measure the response of Dekalb White laying hens to different intakes of digestible methionine + cystine (met+cys) to optimise their performance. Two hundred eighty-eight Dekalb White laying hens, ranging in age from 33 to 48 weeks, were used in the study. The birds were randomly allocated into eight treatment (levels of met+cys and the control treatment) groups with six replicates of six hens per unit. The experimental diets consisted of seven increasing levels of met+cys (1.37, 2.75, 4.14, 5.51, 6.89, 7.92 and 8.95 g kg−1) and were prepared using a dilution technique. A control treatment was used to confirm that the limiting response was due to met+cys intake. Egg production, feed intake, egg weight, egg mass and feed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broken Line; Dose-response; Models; Requirement; Statistic.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000100015

Calcium levels and calcium: available phosphorus ratios in diets for white egg layers from 42 to 58 weeks of age
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Pastore,Silvana Marques; Gomes,Paulo Cezar; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Calderano,Arele Arlindo; Vellasco,Cássia Rampini; Viana,Gabriel da Silva; Almeida,Rodrigo Lopes de.
The experiment was conducted to determine the nutritional requirement of calcium and the best calcium:available phosphorus ratio for commercial layers at the post-laying peak. A total of 324 Hy-Line W-36 laying hens were utilized in the period from 42 to 58 weeks of age, distributed in a completely randomized design in a 3 × 3 factorial arrangement, composed of three levels of calcium (39, 42 and 45 g/kg) and three calcium:phosphorus ratios (12.12:1; 10.53:1; and 9.30:1), totaling nine treatments with six replications and six birds per experimental unit. There was no significant effect from the calcium levels × calcium:phosphorus ratio interaction for any of the variables studied. The calcium levels and the calcium:phosphorus ratios did not affect the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Mineral; Performance; Requirement.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200007

Effect of different digestible isoleucine/lysine ratios for broiler chickens
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Tavernari,Fernando de Castro; Lelis,Guilherme Rodrigues; Carneiro,Paulo Roberto de Oliveira; Vieira,Rodolfo Alves; Polveiro,Richard Costa; Luengas,Jorge Armando Prada; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira.
Two experiments were conducted to evaluate different digestible isoleucine/lysine ratios on diets for broiler chickens in the starter (7 to 21 days) and finishing (30 to 43 days) phases. For the tests, the experimental design was of randomized blocks with seven treatments (six different digestible isoleucine/lysine ratios and a control treatment) and eight repetitions of 25 and 20 birds (COBB males) per experimental unit in the starter and finishing phases, respectively. The diets met the requirements, except for isoleucine and lysine. To avoid excess lysine in the experimental diets, the digestible lysine content was calculated to be 87% and 89% of the recommended for the starter and finishing phases, respectively. The control treatment was adequate in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoleucine; Lysine; Ratio; Requirement.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700020

Nutritional plans for boars
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Kiefer,Charles; Donzele,Juarez Lopes; Oliveira,Rita Flavia Miranda de; Suguisawa,Liliane; Suguisawa,Jorge Murilo; Marques,Ana Carolina Wider.
The objective of the present study was to evaluate nutritional plans for boars. Four hundred animals of 67 to 135 days of age and initial weight of 27.75±1.61 kg were distributed in a randomized block design with seven nutritional plans for boars (9.0-8.0; 9.0-9.0; 10.0-9.0; 10.0-10.0; 11.0-10.0; 11.0-11.0 and 12.0-11.0 g/kg of digestible lysine from 67 to 107 days and from 108 to 135 days, respectively) with four repetitions and a control plan for barrows (11.0-10.0 g/kg of digestible lysine) with eight repetitions and ten animals each. Uncastrated male swine presented better feed conversion; however they showed a lower marbling degree in relation to barrows, regardless of the nutritional plan. The nutritional plan that corresponds to the sequence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Ideal protein; Nutrition; Performance; Requirement.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600019

Available phosphorus levels in diets for pigs with high genetic potential for lean meat deposition kept in thermoneutral environment from 15 to 30 kg
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Alebrante,Leandro; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Saraiva,Alysson; Guimarães,Simone Eliza Facioni; Ferreira,Aloízio Soares.
It was used 72 pigs, 36 castrated males and 36 females, with initial weight of 14.97 ± 0.36 kg to evaluate levels of dietary available phosphorus (aP). The animals were distributed in a completely randomized block design, with six levels of aP (0.107; 0.214; 0.321; 0.428; 0.535 and 0.642%), six replicates and two animals (one castrated male and one female) per experimental unit. Air temperature and relative humidity in the room were kept at 24.5 ± 1.2°C and 76.3 ± 8.5%, respectively. The levels of aP influenced both daily feed intake and daily weight gain, which increased in a quadratic way up to the estimated levels of 0.420% and 0.443%, respectively and feed conversion, which improved in a quadratic manner up to the estimated level of 0.461%. It was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotype; Minerals; Requirement; Swine; Temperature.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200013

New approaches, development, and improvement of methodologies for the assessment of B-vitamin requirements in dairy cows
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Girard,Christiane L.
ABSTRACT Studies on B-vitamin requirements of cattle, conducted more than 60 years ago, concluded that mature ruminants do not require B-vitamin supplements because the amounts of vitamins provided by the diet and synthesized by the ruminal microflora were sufficient to prevent emergence of deficiency symptoms. As a result, the impact of subclinical deficiency on maintenance of normal and efficient metabolism has been disregarded and very little research effort has been devoted at defining dairy cow requirements for B vitamins. However, emergence of deficiency symptoms is the last stage of the deficiency; deficiency appears as soon as the supply is inferior to the needs, leading to a loss of metabolic efficiency. As B vitamins play critical roles in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: B-vitamin; Dairy cow; Metabolism; Requirement; Rumen.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000700614

Macro mineral requirements by grazing zebu bovines
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Moraes,Eduardo Henrique Bevitori Kling de; Paulino,Mário Fonseca; Moraes,Kamila Andreatta Kling de; Valadares Filho,Sebastião de Campos; Lazzarini,Isis; Monnerat,João Paulo Ismério dos Santos; Couto,Victor Rezende Moreira; Souza,Marcos Gonçalves de.
The objective of this study was to determine requirements of calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K) and sodium (Na) for grazing zebu bovines. The experiment area was composed of Brachiaria decumbens paddocks. Twenty-seven non-castrated animals, with initial live weight of 311.0 kg and at an average age of 14 months were used. Three animals were slaughtered, after adaptation period, so they were used as control for estimates of empty body weight and initial body composition of animals in the experiment. Out of the 24 remaining animals, four were sent to the maintenance group with restrict grazing time to limit energy intake close to the maintenance level. The other 20 animals were distributed in four treatments: mineral mixture,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macro minerals; Pasture; Requirement; Zebu cattle.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200023

Mathematical models in ruminant nutrition
Provedor de dados: Scientia Agricola
Autores: Tedeschi,Luís Orlindo; Fox,Danny Gene; Sainz,Roberto Daniel; Barioni,Luís Gustavo; Medeiros,Sérgio Raposo de; Boin,Celso.
Mathematical models can be used to improve performance, reduce cost of production, and reduce nutrient excretion by accounting for more of the variation in predicting requirements and feed utilization in each unique production situation. Mathematical models can be classified into five or more categories based on their nature and behavior. Determining the appropriate level of aggregation of equations is a major problem in formulating models. The most critical step is to describe the purpose of the model and then to determine the appropriate mix of empirical and mechanistic representations of physiological functions, given development and evaluation dataset availability, inputs typically available and the benefits versus the risks of use associated with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Feeding; Nutrient; Requirement; Supply.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100015

Developing a continuous adjustment factor for dry matter intake of gestating and lactating ewes
Provedor de dados: Scientia Agricola
Autores: Gallo,Sarita Bonagurio; Tedeschi,Luis Orlindo.
ABSTRACT: Intake is a multifactorial process that is influenced by animal type, environmental factors, and diet characteristics. Sheep, especially, have specific eating habits, with a greater selection of ingested feed compared to cattle. Thus, predictive equations for dry matter intake (DMI) must constantly be reviewed. The objective of this study was to combine different adjustment factors to develop one continuous adjustment factor for predicting the DMI of pregnant, dry, and lactating ewes. The equations evaluated for non-lactation ewes accounts for metabolic body weight and weight gain, and the equation for lactating ewes includes milk production and its fat content. The database used in this study was pooled from hair sheep ewes, two to four years...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mathematical model; Nutrition model; Prediction; Requirement; Sheep.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200502

Digestible lysine levels for laying hens and their effects on egg quality
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Santos, Tiago Antônio dos; Instituto Federal de Educação Ciência e Tecnologia de Minas Gerais,; Geraldo, Adriano; Instituto Federal de Educação Ciência e Tecnologia de Minas Gerais; Machado, Luiz Carlos; Instituto Federal de Educação Ciência e Tecnologia de Minas Gerais; Pelícia, Kléber; Universidade José do Rosário Vellano; Simão, Sérgio Domingos; Instituto Federal de Educação Ciência e Tecnologia de Minas Gerais; Vieira Filho, Javer Alves; Universidade Estadual Paulista.
Egg quality of semi-heavy laying hens fed on low protein diets (14.0% CP) and on different lysine levels is evaluated, while maintaining the same ratio of digestible amino acids / digestible lysine. Four hundred and twenty commercial strain Isa Brown laying hens, 28 weeks old, were divided into 42 experimental plots. A completely randomized design with six treatments and seven replicates was employed in four production cycles of 28 days each. Treatments comprised Control - 16.92% CP; 0.750% digestible lysine. Treatments 1 to 5, with CP levels 14% and digestible lysine levels 0.600, 0.675, 0.750, 0.825 and 0.900% respectively. Levels of Treatments 1 and 2 (0.546 and 0.640% digestible Met + Cys / 0.600 and 0.675% digestible lysine) provided smaller egg size....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 ideal protein; Digestible amino acids; Isa Brown; Requirement; Diet.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21823

Phosphorus on performance, hematological, biochemical, and bone parameters of growing pigs
Provedor de dados: Ciência Rural
Autores: Drews,Jana Euclydes; Haese,Douglas; Kill,João Luís; Lorenzoni,Lucas Lemke; Pimentel,Rafael Bozini; Molino,Juliano Pelição; Saraiva,Alysson; Possatti,Carolina D'Ávila.
ABSTRACT: The purpose of this study was to assess the levels of available phosphorus (AP) in the diet of growing pigs selected for lean deposition on the hematological, biochemical, and bone performance parameters. A total of 64 commercial hybrid pigs (32 castrated males and 32 females; mean initial weight: 23.31±2.4kg; age: 55-90 days) were used. Animals were distributed into a randomized block design with four treatments, eight replicates, and two animals (one male and one female) per experimental unit. The treatments consisted of a basal diet and another three diets, which were obtained by supplementing the basal diet with dicalcium phosphate replacing the inert phosphate, resulting in four diets with 0.100, 0.180, 0.260, and 0.340% of available...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Requirement; Blood tests; Mineral; Genetic potential.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601076

Net energy for 60- to 120-kg pigs fed low-crude protein diets
Provedor de dados: Ciência Rural
Autores: Saraiva,Alysson; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Silva,Francisco Carlos de Oliveira; Abreu,Márvio Lobão Teixeira de; Santos,Fabrício de Almeida; Haese,Douglas.
Two experiments were conducted to determine the effects of dietary net energy content (NE) on performance and carcass traits of finishing barrows fed low-crude protein (CP) diets. Pigs (60.0±1.05kg, Exp. 1, 93.0±1.56kg, Exp. 2) were allotted in a randomized block design to 3 dietary treatments. Exp. 1 had 6 pens treatment-1 and Exp. 2 had 8 pens treatment-1 and all pens had 2 pigs. The treatments were: 199g kg-1 CP and 2566kcal kg-1 NE, 155g kg-1 CP and 2631kcal kg-1 NE, 155gk g-1 CP and 2566kcal kg-1 NE in Exp. 1, and 180g kg-1 CP and 2588kcal kg-1 NE, 145g kg-1 CP and 2638kcal kg-1 NE, 145g kg-1 CP and 2588kcal kg-1 NE, in Exp. 2. In Ep.1, except for average daily gain (ADG) there was no effect of dietary CP or NE on any other parameter evaluated. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Finishing phase; Nutrition; Requirement.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000901632

Sequences of digestible lysine for gilts from 60 to 148 days of age
Provedor de dados: Ciência Rural
Autores: Silva Júnior,Veredino Louzada da; Donzele,Juarez Lopes; Oliveira,Rita Flávia Miranda de; Saraiva,Alysson; Silva,Francisco Carlos de Oliveira; Kill,João Luís.
The experiment was conducted to evaluate five nutritional plans based on sequences of standardized ileal digestible lysine: 0.90-0.80-0.70, 1.00-0.90-0.80, 1.10-1.00-0.90, 1.20-1.10-1.00, and 1.30-1.20-1.10% fed to gilts from 60 to 99, 129 to 100, and 130 to 148 days of age, respectively. Eighty commercial hybrid gilts, selected for lean gain, with initial weight of 23.46±0.27kg were allotted in a randomized block design, with five treatments, eight replicates, and two pigs per experimental unit. No effect (P&gt;0.05) of the nutritional plans was verified on daily feed intake, daily weight gain and feed conversion. The nutritional plans had no influence (P&gt;0.05) on any of the carcass traits evaluated (carcass yield, meat amount, and meat yield). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Carcass; Performance; Pigs; Requirement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000100118