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Search Results: 1 - 10 of 5150 matches for " neutral detergent fiber "
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Consumo de fibra em detergente neutro por bovinos em confinamento
Detmann, Edenio;Queiroz, Augusto César de;Cecon, Paulo Roberto;Zervoudakis, Joanis Tilemahos;Paulino, Mário Fonseca;Valadares Filho, Sebasti?o de Campos;Cabral, Luciano da Silva;Lana, Rogério de Paula;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000700027
Abstract: the objective of this work was to evaluate the intake of neutral detergent fiber (ndf) by fedlot cattle, the principal factors that influencing this variable, and to correlate the ndf to total dry matter (dm) intake. the data published at the brazilian journal of animal science society and brazilian journal of animal science among the years of 1991 and 2000, totaling 45 scientific works and 181 averages of treatments, were evaluated. the level of total digestible nutrients was negatively correlated to the level of ndf in diets (r = -0.6006; p<.01). the concentration of non-fibrous carbohydrates influenced in a negative way the digestibility of ndf (ndfd) (r = -0.1631; p <.09); however, no statistical procedure employed allowed to detect effects of ndfd on the total dm intake (p>.10). the description of the relationship among total dm intake and level of ndf in the diet was accomplished using a biphasic profile, looking for similarity to the curves proposed by the static model of dm intake prediction. the intersection of the curves projected a intake of ndf (ndfi) of 11.93 g/kg lw. however, the evaluation of ndfi estimated during the phase attributed to the physical controllers of intake showed inconstancy, generating divergence among the points of maximum intake of dm and ndf. this profile indicated that the transition among the physical and physiologic mechanisms is, possibly, delimited by an interval with interaction among mechanisms. the evaluation of ndfi according to the level of forage in the diets showed stable profiles in concentrations above to 60%, being of 13.53 g/kg lw in the interval from 80 to 100%. possible interactions with the indigestible fraction of ndf can dictate the plasticity of the daily limit of ndfi.
Fibra solúvel e amido como fontes de carboidratos para termina??o de novilhos em confinamento
Faturi, Cristian;Ezequiel, Jane Maria Bertocco;Fontes, Nivia Araujo;Stiaque, Marcelo Gil;Silva, Octávio Guilherme da Cruz e;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000700031
Abstract: the effects of starch or neutral detergent soluble fiber associated with two dietary levels of ndf on performance of finishing feedlot beef steers were evaluated in this trial. twenty-four crossbred ? angus x ? nellore steers averaging 18 months of age and 329 ± 24 kg of body weight at the beginning of the trial were used. all four diets were balanced to supply the crude protein requirements for a daily weight gain of approximately 1.4 kg. diets were composed (dry matter basis) by 40% of corn silage and 60% of concentrate containing corn grain, citrus pulp, soybean hulls, salt, and urea. animals fed the diet containing high soluble fiber and low ndf content had the lowest dry matter intake (dmi), which compromised weight gain and feed conversion. this decrease in dmi can be explained by the greater level of citrus pulp (45%) compared to the other three diets. between diets with higher ndf levels, that with soluble fiber resulted in greater daily weight gain (1.435 vs. 1.262 kg) and better feed conversion ratio (7.494 vs. 8.651) than the diet with starch. however, no significant difference was observed between the diet with high ndf and soluble fiber compared to that with low ndf and starch for these same variables. in conclusion, animal performance can be improved by changing the source and content of dietary soluble carbohydrates.
Composi??o química do baga?o de cana-de-a?úcar amonizado com diferentes doses de uréia e soja gr?o
Oliveira,T.S.; Rocha Júnior,V.R.; Reis,S.T.; Aguiar,E.F.; Souza,A.S.; Silva,G.W.V.; Dutra,E.S.; Silva,C.J.; Abreu,C.L.; Bonalti,F.K.Q.;
Archivos de Zootecnia , 2011, DOI: 10.4321/S0004-05922011000300051
Abstract: the objective of this work was to evaluate the effect of the different levels of urea and ground whole soybean as a urease source on the chemical composition of the ammoniated sugarcane bagasse. four levels of urea (2%, 4%, 6% e 8% dm) and three levels of ground whole soybean (0%; 2% e 4%, dm) were added to sugarcane bagasse stored during 52 days in plastic bags (50 l). we analyzed the levels of dm, cp, ndf, adf, cellulose, hemicellulose and lignin. was used a complete randomized design with three replicates for treatments. the gradual increase of the urea levels in the process of amoniza??o of sugarcane bagasse implied in reduction of ndf, adf, cellulose, hemicellulose and lignin, and increase of cp. however, the levels of dm were not affected by different levals of urea and whole soybean used in different treatments, differing only in the dm ofin nature sugarcane bagasse. the use of ground whole soybean, as source of urease, in the amoniza??o of sugarcane bagasse, was efficient in the reduction of the levels of ndf only for the levels of 2 and 4% of urea.
Estudo comparativo da cinética de degrada??o ruminal de forragens tropicais em bovinos e ovinos
Campos, P.R.S.S.;Valadares Filho, S.C.;Cecon, P.R.;Detmann, E.;Le?o, M.I.;Souza, S.M.;Lucchi, B.B.;Valadares, R.F.D.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2006, DOI: 10.1590/S0102-09352006000600030
Abstract: the neutral detergent fiber degradability (ndfd) of sugar-cane, and elephantgrass, corn, and sorghum silages were predicted by in situ method, with different time points, sample grind sizes (1 and 2mm) and animal species (sheep and cattle). the feedstuffs were incubated at 3, 6, 12, 24, 36, 48, 72, 96, 120, 144, 240 hours. the effects of sample grind sizes and of the species in ndfd were analyzed through the test of identity of non-linear regression models and interpreted by factor analysis. the rates of degradation of ndf (kd) were also estimated for two times of incubation in situ (times 6 and 24h or 6 and 36h), and they were compared to the kd values estimated at the in situ trial, through the t statistical test. the kd values estimated by different time points and predicted by in situ incubation times were similar (p>0.05). there is little interference of particle size in degradation parameters, and the ndf degradation in situ trials in sheep can not be used as an experimental model for cattle.
Substitui??o do feno de "Coastcross" (Cynodon sp.) por casca de soja na alimenta??o de borregas confinadas
Morais, Janice Barreto de;Susin, Ivanete;Pires, Alexandre Vaz;Mendes, Clayton Quirino;Oliveira Júnior, Reinaldo Cunha de;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000400025
Abstract: forty-eight santa ines ewe lambs (23.1kg bw and 124 days old) were used to evaluate the replacement of coastcross hay by soybean hulls on feedlot performance. animals were assigned to a complete randomized block design with four diets and six replicates. all diets were isonitrogenous and contained the same amount of ndf. soybean hulls replaced hay at 0%, 12.5%, 25% or 37.5% on dm basis, corresponding to the experimental treatments ocs, 12.5cs, 25cs and 37.5cs, respectively. soybean hulls ndf replaced hay ndf at 0, 25, 50 and 75%. there was a linear increased response (p<0.01) on dry matter intake (0.95, 1.02, 1.08 and 1.20kg day-1) and average daily gain (113, 137, 150 and 187g day-1) and a linear improvement (p<0.01) on feed conversion (8.55, 7.20, 7.11 and 6.25kg of dm kg of gain-1) when soybean hulls were added to the diet. when soybean hulls are added to the diet (up to 37.5%, dm basis) there is an improvement on animal performance and the ewe lambs attain breeding weight faster.
Analysis of Some Important Forage Quality Attributes of Southeastern Wildrye (Elymus glabriflorus) Using Near-Infrared Reflectance Spectroscopy  [PDF]
Jason Brett Rushing, Uttam K. Saha, Rocky Lemus, Leticia Sonon, Brian S. Baldwin
American Journal of Analytical Chemistry (AJAC) , 2016, DOI: 10.4236/ajac.2016.79060
Abstract: Southeastern wildrye (Elymus glabriflorus, Vasey ex L.H. Dewey) is a cool-season, perennial grass native to southeastern United States. Recently, there is a growing interest in its development as a grazing and haying forage crop due to its wide area of adaptation across this region. Consequently, there is a great need for the evaluation of its forage quality by rapid, but accurate analytical methods like Near-Infrared Reflectance Spectroscopy (NIRS). In this study, acceptable NIRS calibration models were developed for: dry matter, DM (n = 113, R2 = 0.904, RSCD = 2.54, RSCIQ = 4.65); crude protein, CP (n = 113, R2 = 0.974, RSCD = 5.16, RSCIQ = 5.92); acid detergent fiber, ADF (n = 116, R2 = 0.896, RSCD = 2.35, RSCIQ = 1.28); neutral detergent fiber, NDF (n = 118, R2 = 0.934, RSCD = 2.53, RSCIQ = 3.38); digestible dry matter, DDM (n = 116, R2 = 0.895, RSCD = 2.36, RSCIQ = 1.35); dry matter intake, DMI (n = 115, R2 = 0.924, RSCD = 2.40, RSCIQ = 2.53); and relative feed value, RFV (n = 114, R2 = 0.932, RSCD = 2.94, RSCIQ = 2.81). Prediction of independent validation sets yielded good agreement between the NIRS predicted values and the laboratory reference values for each of: DM (n = 53, R2 = 0.831, RPD = 2.45, RPIQ = 4.24); CP (n = 57, R2 = 0.967, RPD = 5.37, RPIQ = 7.16); ADF (n = 49, R2 = 0.895, RPD = 2.97, RPIQ = 1.51); NDF (n = 53, R2 = 0.928, RPD = 3.75, RPIQ = 4.22); digestible dry matter, DDM (n = 55, R2 = 0.860, RSCD = 265, RSCIQ = 1.15); dry matter intake, DMI (n = 156, R2 = 0.845, RSCD = 2.48, RSCIQ = 2.11); and relative feed value, RFV (n = 55, R2 = 0.916, RSCD = 3.45, RSCIQ = 3.04) contents, indicating that all seven calibration models had good quantitative information. Therefore, precise, accurate, and rapid analysis of these important forage quality attributes of southeastern wildrye can be routinely done using the developed NIRS calibration models.
Evaluation of sodium sulfite and protein correction in analyses of fibrous compounds in tropical forages
Gomes, Daiany íris;Detmann, Edenio;Valadares Filho, Sebasti?o de Campos;Mezzomo, Rafael;Souza, Natália Krish de Paiva;Queiroz, Augusto César de;Detmann, Kelly da Silva Coutinho;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000100032
Abstract: the objective of this study was to evaluate the contents of fibrous compounds in tropical grasses and legumes according to utilization of sodium sulfite in the neutral detergent solution or using a procedure for contaminant protein correction. samples of ten grasses and ten legumes were used. the contents of neutral detergent fiber were decreased when sodium sulfite was used; however, more prominent reductions were verified in legumes. sodium sulfite decreased the acid detergent fiber content in both forage groups. the contents of neutral and acid detergent insoluble protein and lignin were reduced by sodium sulfite in legumes, but no effect was observed in grasses with regard to these variables. the decrease in fiber contents in legumes could be explained by the solubilization of lignin and decrease in insoluble nitrogen. however, the decreases in fiber in grasses could not be solely explained by the decrease in contaminant protein and solubilization of lignin, and loss of other fibrous compounds probably occurred. the utilization of sodium sulfite compromises the accuracy of the estimates of fibrous compounds contents in tropical forages. the precision of the estimates were not relevantly increased by sodium sulfite. the correction of insoluble fibrous compounds for protein is suggested instead of using sodium sulfite because there are no modifications on neutral detergent solution or undesirable solubilization of fibrous compounds.
Determina??o do consumo, digestibilidade e fra??es protéicas e de carboidratos do feno de Tifton 85 em diferentes idades de corte
Gon?alves, Geane Dias;Santos, Geraldo Tadeu dos;Jobim, Clóves Cabreira;Damasceno, Júlio Cesar;Cecato, Ulysses;Branco, Ant?nio Ferriani;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000400004
Abstract: the objectives of this experiment were to determine dry matter intake (dmi), apparent digestibility of dry matter (admd), organic matter (adom), neutral detergent fiber (adndf), in vitro dm digestibility (ivdmd) and protein and carbohydrate fractions of bermuda grass hay harvested at 21, 42, 63 and 84 days. the experimental design used to estimate the feed intake and the apparent digestibility was a 4 x 4 latin square and to evaluate age effect was used regression analysis. dry matter intake (dmi) and apparent digestibility of dm, om, cp and ndf showed a negative linear response for harvest age. results for in vitro dm digestibility (ivdmd) were similar to apparent digestibility. protein and the carbohydrate c fractions increased with harvest age and average values ranged from 17.4 to 22.8 and 10.9 to 14.3%, respectively. b3 protein fraction increased with harvest age and b2 fraction showed little variation with harvest age. a and b1 carbohydrate fractions decreased with harvest age. results for dmi were 2.4, 2.2, 2.1 and 1.1% and for ivdmd were 60.5, 58.8, 56.3 and 53.8% for the 28, 42, 63 and 84 days of harvest age, respectively.
Efeito da altura de corte das plantas na produtividade de matéria seca e em características bromatológicas da forragem de milho
Vasconcelos, Ramon Correia de;Von Pinho, Renzo Garcia;Rezende, Adauton Vilela;Pereira, Marcos Neves;Brito, André Humberto de;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000600006
Abstract: this work was conducted with the purpose of evaluating dry matter yield and the chemical nutritive composition of forage of corn cultivars submitted to cutting heights of the plants (height 1 0,1 m, and height 2 0,8 m) in three growing years. the experiments were set up in an experimental area of the agriculture department of the federal university of lavras (ufla) in the agricultural crops of 1998/1999, 1999/2000 and 2000/2001, where five corn cultivars were utilized in the first year and six corn cultivars in the following years. the experiments were conducted in the randomized block design in a 5 x 2 and 6 x 2 factorial scheme, where as five and six corn cultivars and two cutting height, with three replications. the characteristics of dry matter yield (dmy), crude protein (cp), neutral detergent fiber (ndf) and acid detergent fiber (adf) were evaluated. a significant effect was found for cutting heights in all characteristics evaluated. crude protein contents increased and ndf and adf contents decreased with the increase of the cutting height of the plants. comparing the two cutting heights, it was found that there was a reduction in yield of 3.3 ton.ha-1 for dmy, an increase of 0.6% in crude protein content, a reduction of 4.4% in the percent of ndf and a decrease of 3.9% in the percent of adf. the results obtained allowed to conclude that the elevation of the cutting height, although had contributed to the decrease of dry matter yield provided, an improvement in forage quality, due to the most fibrous and least digestible part of the corn plant have not been harvested.
Compara??o entre dois métodos analíticos para determina??o da lignina de algumas gramíneas forrageiras
Fukushima, Romualdo Shigueo;Rosa, Artur Jord?o de Magalh?es;Lima, César Gon?alves de;Cunha, José Aparecido da;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000600014
Abstract: this work was carried out aiming to compare lignin concentration of some grass forages through two analytical methods (acid detergent lignin - adl and permanganate lignin - perl) as well to verify a possible relationship of lignin concentration with fiber digestion of the following grass hays: andropogon (andropogon gayanus); oats (avena sativa); a good quality and another of poor quality coast-cross (cynodon dactylon). acid detergent and permanganate lignin values were different (p £ 0.05) among the hays, however perl concentrations were consistently lower than adl values. there were differences (p £ 0.05) among the digestibility of neutral and acid detergent fiber fractions, however a clear relationship between these values with lignin concentration could not be assessed. the data suggested that lignin concentration, taken individually, is not the only factor to explain a given value of digestibility.
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