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Search Results: 1 - 10 of 4187 matches for " average daily gain. "
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Common beans (Phaseolus vulgaris L.) in the rations for cattle in feedlot  [PDF]
Rafael Henrique de Tonissi e Buschinelli de Goes, Karl Whays Klein, Luis Henrique Martinhago, Euclides Reuter de Oliveira, Kelly Cristina da Silva Brabes, Maria Gizelma de Menezes Gressler, Mayara Mitiko Yoshiraha, Raquel Tenório de Oliveira, Etelvitor Martins Leite dos Santos
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.412106

To evaluate the inclusion of common beans in the diet of cattle in feedlot on characteristics of productive performance, nutrient digestibility and ruminal fermentation parameters, 15 bulls crossed were used in a completely randomized design. The animals were confined for 64 days, and 21 days of adaptation. We evaluated the inclusion common beans at levels of 0%, 13% and 26%. All diets were isocaloric and isonitrogenous with a 45:55 forage: concentrate ratio. The addition of beans in the diet did not affect animal performance, dry matter intake and feed efficiency. Inclusion bean changed the nutrient digestibility of DM, CP, EE, TC and OM, where the best digestibility was observed with the inclusion 13% and the lowest concentration of ruminal NH3-N. The general behavior of ruminal pH in relation to levels of inclusion of beans was 6.2. The inclusion of up to 13% of beans in the diet of feedlot cattle did not alter the apparent digestibility, ruminal and animal performance.

Effects of Plant Tannin Extracts Supplementation on Animal Performance and Gastrointestinal Parasites Infestation in Steers Grazing Winter Wheat  [PDF]
B. R. Min, K. Hernandez, W. E. Pinchak, R. C. Anderson, J. E. Miller, E. Valencia
Open Journal of Animal Sciences (OJAS) , 2015, DOI: 10.4236/ojas.2015.53038
Abstract: Twenty-six stocker cattle (286.1 ± 25.7 kg) were used to quantify the effect of commercial plant tannin extracts (control vs. mimosa and chestnut tannins) on animal performance, gastrointestinal parasites control and plasma metabolite changes in heifers grazing winter wheat forage (Triticum aestivum L. var. “cutter”). The forage biomass and crude protein content were generally similar among treatments. Initial live-weight (LW) was similar among treatments, although final LW (P = 0.1) and average daily gain (ADG; P < 0.01) differed. Logarithmic (log) fecal egg counts (FEC) for Haemonchus contortus was higher (P < 0.02) for mimosa tannins group than for control group, and chestnut tannins group was intermediate in cattle grazing wheat forage on day 35. Logarithmic FEC for Ostertagia was lower (P < 0.05) for chestnut tannins group than for both control and mimosa tannins group on day 41. However, log FEC for Cooperia was lower (P < 0.04) for mimosa tannins than for both control and chestnut tannins group. Blood parameters were similar among treatments, except cholesterol level on day 70. Blood cholesterol level was higher (P < 0.02) for chestnut tannins group than for control, and intermediate for mimosa tannins. However, cholesterol level was similar among treatment after 20 days cessation of tannins treatments. Our data suggest that heifers grazing winter wheat forage supplemented with plant tannins rather than control (non-tannins group) increased ADG (8% to 19%) for mimosa and chestnut tannins groups, respectively with no detectable detrimental effects on animal health. The increase in ADG may be due to decrease fecal parasites infections.
Growth and feed efficiency of range performance tested beef bulls in the arid sweet bushveld of South Africa  [PDF]
Lesley Mashiloane, Andre Bothma, Kabelo Madia, Julius Sebei, Khathutshelo Nephawe
Open Journal of Animal Sciences (OJAS) , 2012, DOI: 10.4236/ojas.2012.24036
Abstract: Data consisting of test performance records of 725 bulls was analysed to evaluate trends for growth and feed efficiency, and to determine environmental factors that influence growth of range performance tested bulls in the arid sweet bushveld of South Africa. Performance data were subjected to regression procedures to estimate parameters of the slope (β) and intercept (α) for average daily gain (ADG) and Kleiber ratio (KR). Mixed procedures were applied to test for sources of variation in ADG and KR. There was an increase of 3.481 g/day/year and 0.528 g/day/ year in ADG for Nguni and Bonsmara bulls, respectively. The ADG trends’ respective feed efficiency as reflected by KR was 0.093 and 0.059. Herd of origin and test-year were the sources of variation for ADG while the variation in KR was due to the herd of origin, test-year, start-age and start-weight. Results indicated a steady increase in ADG and KR for range performance tested bulls in the arid sweet bushveld.
Homeopatia na termina??o de novilhos em confinamento
ítavo,L.C.V.; Dias,A.M.; ítavo,C.C.B.F.; Ottoni,A.L.; Morais,M.G.; Torres Júnior,R.A.A.;
Archivos de Zootecnia , 2010, DOI: 10.4321/S0004-05922010000200008
Abstract: the aim of this study was to evaluate the performance of brangus steers in feedlot receiving homeopathic product (growth promotor) in the finishing phase. twenty eight, 18 month old steers and 401.5 kg of body weight (pc) were distributed in two treatments: 14 animals received 2 g/animal/ day of homeopathic product, and other 14 steers were not suministered (control group). the feeding was supplied two times a day, being 60% corn silage and 40% of concentrate, on dry matter (ms) basis. there were any effects of the homeopathical treatment on the performance of the steers. the average daily gain (gmd) was 1.35 kg/day for the treatment with homeopathy and 1.23 kg/day for the control group (without homeopathy). the animals that received the homeopathical treatment showed weight at slaughter of 515.79±18.71 kg against 504.36±14.36 kg for the control group. the use of homeopathy did not provide better performance to the animals finished in feedlot. it is recommended that new studies must be carried out with the homeopathic product in different systems of production and levels of feeding.
Caracterización productiva predestete de lechones de Gochu Asturcelta
Menéndez,J.; Goyache,F.;
Archivos de Zootecnia , 2011, DOI: 10.4321/S0004-05922011000300005
Abstract: the aim of the present study is the caracterization of the growth of gochu asturcelta piglets. in this first approach we studied 191 born weights and 146 weaning weights from 12 sows located in the servicio regional de investigación y desarrollo agroalimentario (serida). the average birth weigth was 1439 ± 279 g, the weaning weigth 12.840 ± 3.055 kg with a weaning age of 42 days and a preweaning daily gain of 268 ± 0.061 g/day. the lineal models adjusted for the analysis of the environmental factors of higher significance for the characters under study showed that the birth weight is not affected by piglet sex, 48 h piglet survival or litter number (p>0.05). the weaning weigth was significantly affected by litter number (p= 0.046) and sow age at birth (p= 0.014). the weaning weight of third birth piglets were significantly higher to the first birth. the preweaning daily gain was significantly affected by litter number, age of the sow at birth and weaning age. the weaning weight was not affected by piglet sex (p= 0.68). the third litter growth 34 g/day faster than first birth litter. the present study is the first approach to the characterization of the production ability of gochu asturcelta breed.
Avalia??o da mistura de cultivares de aveia preta (Avena strigosa Schreb) com azevém (Lolium multiflorum Lam.) sob pastejo
Macari, Stefani;Rocha, Marta Gomes da;Restle, Jo?o;Pilau, Alcides;Freitas, Fabiana Kellermann de;Neves, Fabio Pereira;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000300028
Abstract: this work aimed at evaluating the production of beef heifers in two cultivars of black oats (avena strigosa schreb): 'comum' and 'iapar 61' mixed with italian ryegrass (lolium multiflorum lam). the variables evaluated were: forage mass (fm), forage on offer (fo), daily accumulation of dry matter (fad), stocking rate (sr), average daily gain (adg), live weight gain (lwg), crude protein (cp) and in vitro organic matter digestibility (ivomd). no effects (p>0.05) were detected on fad, sr, dap, lwg and cp for the two cultivars. the ivomd of 'iapar 61' presented highest values during a more extended period in growing season of pasture. the 'iapar 61' cultivar can be indicated for use under grazing in rio grande do sul state.
Diagnostic value of copper parameters to predict growth of suckling calves grazing native range in Argentina
Fazzio, Luis E;Mattioli, Guillermo A;Picco, Sebastian J;Rosa, Diana E;Minatel, Leonardo;Gimeno, Eduardo J;
Pesquisa Veterinária Brasileira , 2010, DOI: 10.1590/S0100-736X2010001000004
Abstract: a study was conducted to evaluate the predictive diagnostic value of different copper (cu) parameters as indicators of average daily gain (adg) in growing calves. the effects in calves of cow cu supplementation in the last one-third gestation period were also evaluated. five supplementation trials, with a total of 300 calves, were carried out. two groups of 30 calves were randomly assigned to each trial, one group was parenterally supplemented (sg) and the other was not supplemented (nsg). trials began when calves were three-month-old and ended at weaning time. at each sampling calves were weighed and blood was taken to determine cu concentrations in plasma, whole blood (wb), red cells (rc) and packed cell volume (pcv). liver samples from six animals of each group were taken both at the beginning and at the end of the trial. in two trials the mothers of the sg received cu supplementation at the last one- third gestation period. four of the five trials exhibited low adg in the nsgs. in these groups, plasma cu concentration decreased rapidly before low adg was detected, which occurred with values remaining below 25μg/dl. the decrease of rc cu concentration was considerably slow. wb showed an intermediate position. pcv in the sgs was higher than in the nsgs in all trials. cow supplementation was insufficient to generate a liver storage able to last after calves reached the 3 months of age. these data could be useful to predict the risk of low adg in grazing calves.
Desempenho, comportamento ingestivo e características de carca?a de cordeiros confinados submetidos a diferentes frequências de alimenta??o
Ribeiro, E.L.A.;Mizubuti, I.Y.;Silva, L.D.F.;Paiva, F.H.P.;Sousa, C.L.;Castro, F.A.B.;
Revista Brasileira de Zootecnia , 2011, DOI: 10.1590/S1516-35982011000400025
Abstract: this work evaluated the effect of feeding frequencies on performance, ingestive behavior and carcass characteristics of fedlot lambs. eighteen non-castrated santa inês crossbreed lambs, with initial live weight of 22.79 ± 4.28 kg were used in the experiment. the animals were confined for 56 days in collective pens in a slotted floor sheep barn. the animals were randomly distributed, according to the feeding frequency: once, twice and three times/day. the diet (16.7% of cp and 70.3% tdn) was the same for all groups. the average daily gain, ration consumption, feed conversion, ingestive behavior and carcass characteristics were not affected by feeding frequency. except for leg width, the other body measurements performed on the carcass were not influenced by feeding frequency. among non-carcass live weight components, only yield of full intestine and digestive tract content were affected, because they were smaller for animals that received one feeding daily. the increase on feeding frequencies when diets containing 16.7% cp and 70.3% tdn were offered does not affect performance, the ingestive behavior and characteristics of carcass of confined lambs. therefore, only one feeding per day can be used.
Desempenho de novilhas de corte até o parto recebendo diferentes níveis de suplementa??o durante o período reprodutivo, aos 14 meses de idade
Vaz, Ricardo Zambarda;Restle, Jo?o;Vaz, Márcia Bitencourt;Pascoal, Leonir Luiz;Vaz, Fabiano Nunes;Brondani, Ivan Luiz;Alves Filho, Dari Celestino;Neiva, José Neuman Miranda;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300045
Abstract: the objective was to evaluate the performance of beef heifers until calving receiving different levels of supplementation on native pasture during the first breeding season, from 14 to 17 months: no supplementation; 3.5 g/kg of body weight; and 7.0 g/kg of body weight. ninety-eight charolais, nellore and their crosses, with average initial weight of 255 kg, were used. weight at the end and average daily weight gain during the supplementation period were higher for 7.0 g/kg of supplement heifers (322 and 0.701 kg) compared to those with 3.5 g/kg of supplement (302 and 0.464 kg) and heifers without supplementation (288 and 0.425 kg), which did not differ from each other. body condition score at the end of the supplementation was different between the three treatments, being 3.03, 3.33 and 3.47 points for heifers without supplementation; 3.5 g/kg of body weight; and 7.0 g/kg of body weight, respectively. pregnancy rate was significantly affected by supplementation level, being 35.0, 34.2 and 70.0%, respectively. heifers of the two supplementation treatments had higher conception rate at the first half of the reproductive period. average heifer ages at calving were of 785, 778 and 761 days, respectively. the average daily weight and body condition of the heifers of the two genetic groups were similar; however, the initial and final weight of the supplementation period was higher for charolais bulls daughters, compared with nellore bulls daughters, reflecting on the heat (68.8 vs. 38.2%) and pregnancy (60.9 vs. 26.5%) rates. characteristics related to calving were not affected by the supplementation levels during the reproductive period. the supplementation during the first breeding season increases reproductive performance of heifers at 14 months of age.
Performance of dairy calves fed milk, milk replacer or post-weaning concentrate with acidifiers
Ribeiro, Marinaldo Divino;Pereira, José Carlos;Queiroz, Augusto César de;Cecon, Paulo Roberto;Detmann, Edenio;Azevêdo, José Augusto Gomes;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000500024
Abstract: the objective of this study was to evaluate the effect of the addition of acidifiers to milk, milk replacer or post-weaning concentrate on the performance and health status of weaning and post-weaning calves. three experiments were carried out, in the first experiment 62 holstein × zebu crossbred calves (males and females), reared from birth to 60 days of age, were distributed and fed milk with or without acidifier. from the third day, the calves were suckled (5l of milk/d) for 56 days, split into two meals. the acidifier was added to milk at the time of feeding. from the second week of calf's age a starter diet (18% of cp) was also offer. in second experiment, the same animals from first experiment, but from 61 to 120 days of age were distributed and fed (2 kg/d) post-weaning concentrate (18% of cp) with or without acidifier and cynodon dactylon hay ad libitum. in third experiment, 16 male holstein × zebu crossbred calves, reared from birth to 60 days of age, were distributed and fed milk replacer with or without acidifier. the acidifier used in the first and third experiments was composed by the citric, lactic, fumaric, and phosphoric acids, and vitamin c (liquid diet); and by betaglucans, flavonoides, linoleic and oleic and citric acids, and vitamin c (solid diet). the addition of acidifier to milk or to post-weaning concentrate did not affect the dry matter (dm) and cp intakes, which were 818 and 196; 1740 and 217 g/d respectively. similarly, it did not show high average daily gains, with 525 and 513 g/d, respectively. the addition of acidifiers to milk replacer showed results similar to those observed in calves fed milk. therefore, the use of acidifiers in milk, milk replacer or in the post-weaning concentrate did not result in beneficial effects for calves.
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