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Search Results: 1 - 10 of 11086 matches for " Julio Cesar Damasceno "
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The use of N-alkanes to estimate intake and digestibility of coastcross-1 and Arachis pintoi mixed pasture Uso de N-alcanos para estimar o consumo e a digestibilidade da pastagem de coastcross-1 consorciada com "Arachis pintoi"
Wagner Paris,Ulysses Cecato,Nelson Fukumoto,Julio Cesar Damasceno
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: The trial was carried out to evaluate the alkanes (C27 to C35) profile, dry matter intake and digestibility of Coastcross-1 and Arachis pintoi mixed pasture with or without nitrogen fertilization in two periods (December/2003 and April/2004). The treatments evaluated were: CA0 = Coastcross + Arachis pintoi without N; CA100 = Coastcross + Arachis pintoi with 100 kg of N; CA200 = Coastcross + Arachis pintoi with 200 kg of N and C200 = Coastcross with 200 kg of N. The experimental period was composed by 8 days, with 3 days for marker administration (C32 in cellulose pelets) and 5 days for fecal collection, directly from animal rectum. Sixteen animals were used and maintained on grazed area since June 2003. From December to April, for pasture constituents, there was predominance of n-alkanes with odd chain, mainly for those with higher length chain (C29, C31 and C33), excepting leaves blade of Coastcross that presented the C27 alkane in higher concentration than C33. The highest amounts of n-alkanes C31 and C33 occurred during December. Animal’s intake and DMD did not present differences (P>0.05). The values of DMD using n-alkanes were similar to in vitro DMD of leaves blade from Coastcross. O experimento foi realizado com o objetivo de determinar o perfil dos alcanos (C27 a C35), o consumo e a digestibilidade da matéria seca do pasto de Coastcross-1 consorciada com Arachis pintoi com e sem aduba o nitrogenada em dois períodos (dezembro/2003 e abril/2004). Os tratamentos avaliados foram: CA0 = Coastcross + Arachis pintoi sem N; CA100 = Coastcross + Arachis pintoi com 100 Kg de N; CA200 = Coastcross + Arachis pintoi com 200 kg de N e C200 = Coastcross com 200 kg de N. O período experimental foi de 8 dias, 3 dias para o indicador administrado (C32 em peletes de celulose) e 5 dias de coleta de fezes, diretamente no reto do animal. Utilizou-se um delineamento em blocos ao acaso com duas repeti es. Foram utilizadas 16 novilhas cruzadas. Nos períodos de dezembro e abril, para os constituintes do pasto, houve predomínio dos n-alcanos de cadeia ímpar, principalmente para aqueles de maior comprimento de cadeia (C29, C31 e C33), exce o para as laminas foliares da Coastcross que apresentou o alcano C27 em maior concentra o do que o C33. As maiores quantidades de n-alcanos C31 e C33 ocorreram no mês de dezembro. O consumo dos animais e a digestibilidade do pasto n o apresentaram diferen as (P>0,05). Os valores dos CDMS, com utiliza o dos n-alcanos, foram semelhantes aos CDMS in vitro das laminas foliares da Coastcross
Substitui o do farelo de soja pela farinha de glúten de milho na alimenta o de cabras leiteiras
Macedo Luiz Gonzaga Pego de,Damasceno Julio Cesar,Martins Elias Nunes,Macedo Vicente de Paulo
Revista Brasileira de Zootecnia , 2003,
Abstract: Realizou-se um experimento com cabras Saanen, primíparas, pesando em média, 50 kg, alojadas em baias individuais de 3 m2, objetivando avaliar a substitui o da proteína do farelo de soja (FS) pela proteína da farinha de glúten de milho (FGM), na produ o e composi o do leite, consumo voluntário e níveis de uréia plasmática. O delineamento experimental foi o triplo quadrado latino 4x4, com quatro períodos de 21 dias, sendo 14 dias de adapta o à dieta e sete dias para colheita das amostras. As cabras foram alimentadas e ordenhadas pela manh e tarde. Os níveis de substitui o estudados foram 0, 10, 30 e 50% de FGM (base na proteína bruta). A substitui o do farelo de soja pela farinha de glúten de milho n o afetou o consumo (kg/dia e %PV) de matéria seca, proteína bruta e fibra em detergente ácido, mas houve efeito quadrático, para o consumo de fibra em detergente neutro (kg/dia e % PV). Houve efeito sobre os níveis de uréia plasmática (UP), que foram inferiores para os menores níveis de substitui o, sendo os maiores valores de UP observados para o tratamento que possuía somente FS. A produ o de leite decresceu linearmente com a inclus o da farinha de glúten de milho. Os níveis de substitui o resultaram em decréscimos lineares na produ o de gordura (kg/dia), no teor de gordura do leite (%) e no teor de sólidos totais. Houve efeito quadrático para produ o de lactose (kg/dia), observando-se o menor valor estimado para o nível de substitui o de 31,6%. N o foi observado efeito sobre a produ o de proteína bruta no leite, cujo valor médio foi de 0,083 kg/dia. Os teores de proteina bruta, lactose e sólidos totais n o sofreram efeito dos níveis de substitui o, sendo os valores médios percentuais de 2,98; 4,35 e 11,51%, respectivamente.
Estimativas da digestibilidade e consumo de matéria seca em ovinos alimentados com feno de aveia e concentrado em resposta ao método de administra??o de alcano externo C32
Fukumoto, Nelson Massaru;Damasceno, Julio Cesar;Roehsig, Lauri;C?rtes, Cristiano;Matsushita, Makoto;Santos, Geraldo Tadeu dos;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000800030
Abstract: this experiment was conducted to estimate dm digestibility, fecal output, and dm intake of sheep fed a diet containing oat hay and concentrate. treatments consisted of two methods of administration of the external marker alkane (c32): equilibrium and pulse dose. in the equilibrium treatment, animals received one daily pellet of cellulose containing 100 mg of c32 during eight days (four days for reach steady state conditions and five days for sample collection). animals in the pulse dose treatment received only one pellet of cellulose containing 150 mg of c32 followed by 5 days of fecal collection with 8 hours intervals between sampling. concentrations of most of the internal n-alkanes in the dietary ingredients were lower than 50 mg/kg dm and were greater on oat hay compared to the concentrate. no significant differences for estimation of dm digestibility were observed between treatments. however, there were significant differences among the internal n-alkanes for estimation of dm digestibility. only the alkane c33 was able to estimate a value of dm digestibility that did not differ of that measured through total fecal collection. estimates of fecal output were less variable in the equilibrium treatment but no difference was detected between treatment means. the equilibrium treatment resulted in better estimates of dm intake because of the smaller deviation (observed - estimated/observed x 100) compared to the pulse dose method (-1.68 vs. 26.14%) that was considered inadequate.
Consumo, digestibilidade e parametros ruminais em vacas gestantes alimentadas com silagem de rama de mandioca
Modesto, Elisa Cristina;Santos, Geraldo Tadeu dos;Zambom, Maximiliane Alavarse;Damasceno, Julio Cesar;Branco, Antonio Ferriani;Vilela, Duarte;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000500024
Abstract: the objective of this trial was to study the effects of substituting corn silage by cassava foliage silage in the diets of non lactating, pregnant dairy cows. the levels of substitution of corn silage by cassava foliage silage were 0, 20, 40 and 60%. intake and apparent digestibilities of dry matter, organic matter, crude protein, neutral detergent fiber, total carbohydrates, no fiber carbohydrates were evaluated, and ph and ruminal ammonia nitrogen before and 2, 4, 6 and 8h after the morning feeding were also evaluated. four non lactating pregnant cows (third trimester of gestation) rumen cannulated were allotted to a 4 × 4 latin square design. the substitution of corn silage by different levels of cassava foliage silage did not affect the intake, digestibilities of nutrients and ruminal parameters, except for crude protein apparent digestibility and ruminal ammonia nitrogen. the crude protein apparent digestibility decreased as the corn silage was substituted by cassava foliage silage. ruminal ammonia nitrogen also showed a linear negative effect eight hours after the morning feeding. the substitution of corn silage by cassava foliage silage, in all studied levels could be used for non lactating, pregnant dairy cows diets because did not change intake, ruminal parameters and digestibility of dry matter and nutrients, except for crude protein and ruminal ammonia nitrogen eight hours after morning feeding.
Ruminal parameters of bovines fed diets based on sugar cane with doses of calcium hydroxide
Dias, Alexandre Menezes;ítavo, Luís Carlos Vinhas;Damasceno, Julio Cesar;Santos, Geraldo Tadeu dos;Nogueira, ériklis;ítavo, Camila Celeste Brand?o Ferreira;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000400019
Abstract: the objective of this study was to evaluate the administration of different doses of calcium hydroxide mixed with sugar cane fed to cows by the ph, ammonia nitrogen and volatile fatty acids concentration in ruminal content. four cows with fistulated rumen were distributed in a latin square (4 × 4) in split plot. the treatments involved adding doses of 0, 8, 16 and 24 g/kg of calcium hydroxide to sugar cane in natura. samples of rumen fluid were collected and the ph and concentration of n-nh3 was determined before (time zero) and 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 hours after the feeding time. the concentration of volatile fatty acids at 0, 3, 6, 9 and 12 hours was also determined. the calcium hydroxide contributed to maintain the ph of rumen fluid close to neutral. the average concentrations of n-nh3 in the ruminal fluid was 20.59, 20.49, 17.28 and 18.22 mg/100 ml for samples with calcium hydroxide at 0, 8, 16, 24 g/kg, respectively. there was an effect of the addition of calcium hydroxide on the volatile fatty acids concentration from before feeding until 12 hours after feeding time. there was an effect on doses tested for the concentration of volatile fatty acids. the calcium hydroxide added to the sugar cane influences on ruminal parameters. the dose of approximately 10 g of calcium hydroxide per kg sugar cane in natura is recommended.
Substitui??o do farelo de soja pela farinha de glúten de milho na alimenta??o de cabras leiteiras
Macedo, Luiz Gonzaga Pego de;Damasceno, Julio Cesar;Martins, Elias Nunes;Macedo, Vicente de Paulo;Santos, Geraldo Tadeu dos;Falc?o, Alencariano José da Silva;Caldas Neto, Saul;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000400027
Abstract: it was carried out an experiment with goats saanen, on the first lactation, with 50 kg of body weight, housed in individual stalls of 3 m2, to evaluate the effect of substitution of soybean meal (sm) protein by the protein from the corn gluten flour (cgf), in the milk production, milk composition, voluntary intake and plasmatic urea. the experimental design was the triple latin square 4x4, with four periods of 21 days, being 14 days of adaptation to the diet and seven days for samples collection. the goats were fed and milked in the morning and afternoon. the substitution levels studied were: 0, 10, 30 and 50% of cgf (based in the crude protein). the substitution of the soybean meal by cgm did not affect the intake (kg/day and %bw) of dry matter, crude protein and acid detergent fiber, but there was quadratic effect for neutral detergent fiber intake (kg/day and %bw). there was effect on the levels of plasmatic urea nitrogen (pun), where the smallest values were in the intermediate levels of substitution, being the biggest values for the treatment with only sm. the milk production decreased lineally with the inclusion of cgm. the substitution levels resulted in lineal decrease in the fat production (kg/day), in the milk fat content (%) and milk total solids content (%). there was quadratic effect for lactose production, being the smallest value for 31.6% of substitution level. it was no effect on in crude protein in the milk, which average was .083 kg/day. the crude protein content, lactose and total solids did not suffer effect of the substitution levels, being the average values of 2.98, 4.35 and 11.51%, respectively.
Produ??o e composi??o do leite, consumo de matéria seca e taxa de lota??o em pastagens de gramíneas tropicais manejadas sob lota??o rotacionada
Fukumoto, Nelson Massaru;Damasceno, Julio Cesar;Deresz, Fermino;Martins, Carlos Eugênio;Cóser, Ant?nio Carlos;Santos, Geraldo Tadeu dos;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000700022
Abstract: the objective of this study was to evaluate milk yield and composition, dry matter intake, and stocking rate in pastures with tanzania grass (panicum maximum cv. tanzania), star grass (cynodon nlemfuensis cv. estrela-africana), and marandu grass (brachiaria brizantha cv. marandu). the grasses were managed in a rotational grazing system with holstein x zebu crossbreed cows, with a 30-day resting period and three days of paddock occupation. the pastures were fertilized with 1,000 kg/ha/year using the 20:05:20 (npk) formula, split in three applications during the rainy season. it was used a complete random block experimental design with three factors being studied and two replications. in the experiment, four cows/paddock were used and, when it was necessary, regulator animals were added in order to obtain a supply of 7% body weight green forage dry matter. the animals were individually fed concentrate at 2 kg/day during the experimental period. milk yield did not differ among the three grasses, with values of 9.1; 9.1; and 8.7 kg/cow/day for pastures with tanzania grass, star grass and marandu grass, respectively. similarly, grass did not affect milk chemical composition. stocking rate was similar among the three grasses, with values of 4.6; 4.5 and 5.0 ua/ha for tanzania grass, star grass and marandu grass, respectively. the highest dry matter intake was observed for tanzania grass with 2.6% of the body weight while stargrass (2.3%) and marandu grass (2.4%) did not differ among each other. the highest dry matter intake on tanzania grass pasture was not reflected on milk yield per animal. milk yield and composition and stocking rate are similar among the evaluated grasses.
Consumo e digestibilidade da matéria seca de fenos de braquiária decumbens e amendoim forrageiro em ovinos estimados por meio de n-alcanos
Fukumoto, Nelson Massaru;Damasceno, Julio Cesar;C?rtes, Cristiano;Paine, Rafael Cesário;Queiroz, Maria Fernanda Soares;Santos, Geraldo Tadeu dos;Matsushita, Makoto;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000200026
Abstract: the objective of this trial was to use n-alkanes to estimate dry matter intake (dmi) and dm digestibility in sheep. it was also of particular interest to compare two methodologies of fecal collection (total collection vs. grab samples) as well as to identify which n-alkanes best estimate dmi and dm digestibility. twenty animals were assigned to a completely randomized design and were fed diets containing different proportions of forage peanut (arachis pintoi koprov & gregory cv. amarillo) and signalgrass hays [brachiaria decumbens, (stapf), webster] (0, 15, 30, 45 and 60% of forage peanut; dm basis). the experiment lasted 18 days with 10 days for diet adaptation, three days for marker administration (c32 in cellulose pellets), and five days for fecal collection. data were submitted to analysis of variance and observed and estimated means were compared by t test. fecal grab samples were collected six times daily at 4 hours intervals (9:00, 13:00, 17:00, 21:00, 01:00 and 05:00) for five consecutive days. the internal alkanes c31, c33, and c31 + c33 were used for estimating dmi while dm digestibility was estimated by c33, c35, and c33 + c35. results showed that reliable estimation of dm digestibility was obtained by using the internal alkane c33 corrected for fecal recovery. the combination of the internal alkanes c31 + c33 resulted in the best estimation of dmi with no need for fecal recovery correction. in addition, only one daily fecal grab sample (9 h or 13 h) was necessary to accurately estimate dmi.
Uso de n-alcanos na estimativa da composi??o botanica da dieta em ovinos alimentados com diferentes propor??es de Brachiaria decumbens Stapf e Arachis pintoi Koprov e Gregory
Fukumoto, Nelson Massaru;Damasceno, Julio Cesar;C?rtes, Cristiano;Roehsig, Lauri;Rego, Fabíola Cristine de Almeida;Cecato, Ulysses;Branco, Antonio Ferriani;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000500023
Abstract: the objective of this experiment was to use n-alkane to estimate accurately and precisely the botanical composition of dietary forage in sheep fed different proportions of arachis pintoi koprov & gregory cv. amarillo and brachiaria decumbens stapf (0, 15, 30, 45 e 60% of arachis pintoi). twenty lambs were used in a completely randomized design with 10 days for diet adaptation and 5 days for fecal collection. both fecal composites and hay samples were analyzed for n-alkane concentration. dietary forage proportions were estimated from measured concentrations of n-alkanes in feces and forage by the least square sum of deviations. multivariate analyses and canonical variables were used to select the most discriminatory alkane with the obtained data submitted to analysis of variance. means were compared using the "t" test and the adjustments of the estimated values in relation to the observed were done by linear regression. the canonical variables indicated that the alkanes c35, c33, c30, c31, c27, c29 and c36 had the greatest discriminatory potential. therefore, the use of all these alkanes in the calculation was more accurate and precise (p <0.05) than the use of a combination of 2 or 3 alkanes to estimate the proportion of a. pintoi in the diet. the best adjustment of the regression was also found for these alkanes. the "t" test for the intercept of the equation (a) and the regression coefficient (b) showed that a = 0 and b = 1, indicating that the estimated values are equivalent to the observed. the multivariate analysis appears to be an important tool to select n-alkanes for diet evaluation.
Tipologia de sistemas de produ??o baseada nas características do leite
Bodenmüller Filho, Anselmo;Damasceno, Julio Cesar;Previdelli, Isolde Terezinha Santos;Santana, Rosangela Getirana;Ramos, Carlos Eduardo Crispim de Oliveira;Santos, Geraldo Tadeu dos;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000800028
Abstract: the objective of the study was to propose a methodology of production systems analysis, considering intraannual quantitative flow and the qualitative characteristics of the milk delivered by the farmers to the industry. the data were collected from 1,196 milk producers from 2005 to 2006 using month production variables, fat content, protein, lactose and total solids, counting of somatic cells, and standardized counting in plates. the method of analysis used was the main component analyses and ascending hierarchical classification (typology). the most important variables in the construction of the first principal component (pc1) are fat content, protein and total milk solid contents, which explained 32.5% of the diversity of production systems, and they can be considered as the indicator of milk nutritional quality. in the construction of the second principal component (pc2), the most important variables are lactose content, counting of somatic cells and milk microbial counting, which explained 24.04% of the diversity and represent the hygienic quality of the milk. the intra-annual distribution of the milk production is not important to explain the diversity among milk production units. for the production system typology, it was considered the first three main components whose explanation of the total variability was of 70.52%. the 1,196 milk producing rural properties belong to the 17 groups of milk production systems with their own characteristics of milk quality.
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