Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Search Results: 1 - 10 of 509 matches for " Nellore ram lambs "
All listed articles are free for downloading (OA Articles)
Page 1 /509
Display every page Item
Effect of feeding maize silage supplemented with concentrate and legume hay on growth in Nellore ram lambs
Venkateswarlu Malisetty,Ramana Reddy Yerradoddi,Nagalakshmi Devanaboina Mahender Mallam,Hari Krishna Cherala
Veterinary World , 2013, DOI: 10.5455/vetworld.2013.209-213
Abstract: Aim: The main intension of this research work is to develop a feeding system for growing Nellore ram lambs by feeding maize silage based rations supplemented with concentrate and or legume hay at certain levels to investigate the growth rate. Materials and Methods: Experimental animals (Nellore ram lambs) were purchased from local sandy and maize silage was prepared at village by using silos (9''L X 9''W X 8''D) and concentrate mixture was prepared at feed mill located at department by using locally available ingredients. Animals were housed in well ventilated sheds and were dewormed and vaccinated against diseases. Fortnightly body weights were taken by using spring balance and calculated the total weight gain and ADG. The experimental animals were divided into seven groups based on their body weight to contain six in each and were fed intensively for five months with sole maize silage (R-I), silage + concentrate at 0.5 per cent body weight (R-II), silage + concentrate at 1.0 per cent body weight (R-III), silage + concentrate at 1.5 per cent body weight (R-IV), silage + lucerne hay (R-V) and silage + GN haulms (R-VI) and sweet sorghum bagasse based complete diet (R-VII) to study the growth rate. Results: Significantly (P<0.01) increase in ADG was observed in ram lambs fed R-IV ration was 16.58, 20.49, 24.10, 29.74, 38.28 and 62.01 per cent, respectively in comparison to those fed R-VII, R-V, R-III, R-VI, R-II and R-I rations. Almost similar ADG was noticed in lambs fed R-III, R-V and R-VII rations and the supplementation of concentrate at 0.5%, 1.0% and 1.5% of body weight plus maize silage ad lib has increased the growth/gain in ram lambs by 62.48, 99.81 and 163.25 per cent, respectively in comparison to sole silage feeding. Similarly, supplementation of lucerne hay and groundnut haulms with maize silage has increased the weight gain by 109.31 and 84.97 per cent, respectively in comparison to sole maize silage fed animals. Sole sweet sorghum bagasse (SSB) based complete ration (50:50) fed lambs (R-VII ration) showed the ADG almost similar to those animals fed lucerne hay plus maize silage ad lib. Conclusions: Based on the results of this study, it is concluded that, maize silage can be supplemented either with lucerne hay, groundnut haulms (to meet 25% of DM requirement) or concentrate mixture at 1.5% of body weight for obtaining optimum growth rate in Nellore ram lambs. [Vet World 2013; 6(4.000): 209-213]
Comparación de tres pruebas para medir la capacidad de servicio en carneros adultos
Archivos de medicina veterinaria , 1999, DOI: 10.4067/S0301-732X1999000200005
Abstract: parity rates need to be increased and one way to do this by improving the fertility of rams which in high percentages, are not apt for reproduction. for this, reproductive aptitude tests before service, which include serving capacity (sc) evaluation through a practical and trustworthy pen test should be carried out. this study was carried out to compare different sc pen tests. in experiment 1, done in december, kilgour, laborde and blockey's test measured similar sc (p < 0.05). nevertheless, in experiment 2 done in february, laborde and blockey's tests evaluated sc differently (p 0.05). differences may be explained as a consequence of reproductive seasonality in rams. in both experiments, the tests estimated sc similarly whether they were done at 20 or 40minutes (p < 0.05). this allows to shorten the evaluation time for tests. this is supported in both experiments by the high correlation between reaction time to first service and total number of services (r = -0.59 y r = -0.56; p < 0.01). these results allow to think that laborde's test may be a valid alternative of pen test of sc in adult rams in december as a complement to the classical reproductive fitness test
Growth Performance and Digestibility in Karadi Lambs Receiving Different Levels of Pomegranate Peels  [PDF]
Sarwar M. Sadq, Dereen O. M. Ramzi, Hozan J. Hamasalim, Karzan A. Ahmed
Open Journal of Animal Sciences (OJAS) , 2016, DOI: 10.4236/ojas.2016.61003
Abstract: The objective of current study was to determine the effect of different ratios of pomegranate peel in diets of Karadi lambs (0%, 1%, 2% or 4% as control, T1, T2 and T3, respectively) on body weight, total body gain, average daily gain, daily feed intake and apparent digestibility of nutrients. Sixteen Karadi male lambs weighing 23.29 ± 0.42 kg and 4.5-5 months old randomly divided into equally four treatment groups and individually penned for the period of 63 days. Results indicated that final body weight was significantly (P < 0.05) higher in lambs fed 1% or 2% pomegranate peel (PP) as compared to lambs fed 4% PP. The best improvements in total feed intake, total gain, average daily gain and feed conversion ratio (FCR) in lambs fed 1% PP. The total dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), ash, nitrogen free extract (NFE) and metabolizable energy (ME) intake per (body weight0.75) increased (P < 0.05) significantly in lambs fed 1% pomegranate peel (PP); however, the crude fiber (CF) intake decreased in lambs fed 1% PP as compared to other treatments. While, the dry matter digestibility (DMD), crude protein digestibility (CPD), crude fiber digestibility (CFD) and nitrogen free extract digestibility (NFED) were significantly (P < 0.05) higher in lambs fed 1% PP as compared to T2, T3 and control groups. In addition, EED increased significantly in T3 compared to other treatments. In conclusion, it was indicated that addition of pomegranate peel in diet at the rate of 1% or 2% had significant effect on Karadi lambs performance and digestibility.
Um caso de intoxica??o de bovinos por enterolobium contortisiliquum (Timboril) no Brasil: Case report
Costa,R.L.D. da; Marini,A.; Tanaka,D.; Berndt,A.; Andrade,F.M.E. de;
Archivos de Zootecnia , 2009, DOI: 10.4321/S0004-05922009000200021
Abstract: the present work reports cases of intoxication by enterolobium contortisiliquum (timboril) in bovines of varied ages, in the city of andradina-sp, brazil. the affected animals are part of a bovine herd of nellore and guzera breeds, under extensive management. the intoxications had occurred during dry season, with low forage availability, coincident with fruting period of timboril, whose broadbeans are, apparently, very palatable. the animals presented extensive areas of injuries in the skin, mainly in places without pigmentation. after withdrawal from pasture and medical support treatment, the affected animals presented good recovery and new or relapsing cases were not been observed.
Parametros e tendência genética de peso de bovinos criados á pasto no Brasil
Souza,J.C.; Silva,L.O.C.; Gondo,A.; Freitas,J.A.; Malhado,C.H.M.; Filho,P.B.F.; Sereno,J.R.B.; Weaber,R.L.; Lamberson,W.R.;
Archivos de Zootecnia , 2011, DOI: 10.4321/S0004-05922011000300035
Abstract: genetic parameters and trends of weights were estimated for nellore cattle from central west and south east in brazil. abcz/embrapa provided weights (kg) at 120 (w120), 205 (w205), 365 (w365) and 540 (w540) for 86 852, 86 852, 61 637, 36 187 animals, respectively, from 1975 to 2001. parameters were obtained using mtdfreml in single trait analyses. fixed effects were contemporary group (dry or wet season), year, sex and farm and age of dam (linear and quadratic covariate). random effects were direct and maternal genetic effects, their covariance, and the uncorrelated maternal permanent environmental effect. the analysis was restarted until twice the logarithms of the likelihoods changed no more than two decimal places. estimates of direct and maternal genetic variances, direct-maternal covariance, and environmental and phenotypic variances were [51.1, 17.9, -12.0, 190.5 and 280.4] for w120; [128.6, 47.2, -25.9, 695.7 and 932.4] for w205; [435.9, 32.2, -27.4, 2934.0 and 3604.9] for w365; and [607.9, 177.7, -117.6, 5637.7 and 6602.5] for w540. direct heritabilities ranged from 0.09 to 0.18, maternal heritabilities from 0.01 to 0.06, direct-maternal genetic correlations from -0.23 to -0.36, and permanent environmental effects from 0.05 to 0.12. direct and maternal genetic and environmental trends from 1975 to 2001 were 10.4, -1.6 and 18.43 kg for w120; 16.6, -2.8; and 23.0 kg for w205; 21.7, -1.3 and 23.6 kg for w365, and, 25.5, -3.6, and -8.1 kg for w540, respectively. the direct genetic trends were positive and maternal trends were small. the importance of maternal performance for w120 and w205 suggests it should be considered in breeding programs although it has a low heritability and modestly adverse genetic correlation with direct genetic effects.
Produtividade acumulada como critério de sele??o em fêmeas da ra?a nelore
Schwengber, Eduardo Brum;Bezerra, Luiz Ant?nio Framartino;L?bo, Raysildo Barbosa;
Ciência Rural , 2001, DOI: 10.1590/S0103-84782001000300020
Abstract: this work had for objective to determine the variance components and to estimate the heritability of the accumulated productivity (acp) of 15,070 females, reared in different participant herds of the nellore breeding program. acp is an index that considers the total production of calves weaned in kg, the total time of production of calves and the calving beginning. the statistical analyses were accomplished through the sas program (statistical analysis system) and the variance components for the restricted maximum likelihood method using the software mtdfreml. the average of acp was of 130kg of calves weaned by cow to the year, and the sire of cow effects, herd and year of the birth cow significatly (p<0.0001) affected in the variation of this characteristic. the coefficient of heritability of acp was estimated in 0.15, indicating the existence of enough genetic variability for its inclusion in the improvement programs, what would result in the obtaining of more productive females in the herds.
Efeito de grupo genético e heterose sobre a idade e peso à puberdade e sobre o desempenho reprodutivo de novilhas de corte
Restle, Jo?o;Polli, Volmir Antonio;Senna, Dilceu Borges de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000400023
Abstract: the effect of breed and heterosis on age and weight at puberty and reproductive performance at the first breeding season of beef heifers were evaluated. seventy four charolais (c), nellore (n), ? cn and ? nc females, born in 1987 and 1988, were used. the females were kept on cultivated pasture during the first and second winter, and on native pasture the rest of the time. heterosis for live weight at the different ages, ranged from 12.8 to 14.6%. crossbred heifers, ? cn and ? nc, reached puberty 89 days earlier than straightbreds, resulting a heterosis of -12.9%. average age at puberty was 623, 754, 568 and 634 days, respectively, for c, n, ? cn and ? nc. average live weight at puberty was 352, 299, 323 and 368 kg, respectively. heterosis for percentage of heifers showing heat until 18, 24 and 28 months of age was 76.9, 67.6 and 17.6%, respectively. the percentage of heifers pregnant at the end of the first breeding season, 25 to 28 months, was 94.4, 53.4, 99.4 and 97.5%, respectively, for c, n, ? cn and ? nc. heavier heifers at weaning and at 12 months reached puberty earlier, being the correlation coeficients of -.39 and -.56, respectively.
Compostagem dos dejetos da bovinocultura de corte: influência do período, do genótipo e da dieta
Orrico Junior, Marco Antonio Previdelli;Orrico, Ana Carolina Amorim;Lucas Junior, Jorge de;Sampaio, Alexandre Amstalden Moraes;Fernandes, Alexandre Rodrigo Mendes;Oliveira, Emanuel Almeida de;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000500030
Abstract: the objective of this study was to identify possible alterations in composition and in the composting process of manure produced by canchim and nellore cattle in different periods of feedlot and fed different forage to concentrate ratios. the experiment was carried out in complete randomized design in factorial scheme with time as subdivided plot. plots were established by four treatments: manure from two diets (40% forage and 60% concentrate and 60% forage and 40% concentrate) and two genotypes (canchim and nellore) and sub-plots by three periods of manure gathering (initial, intermediate and final). the efficiency of composting process was evaluated by reductions of volume, total solids, volatile solids, fibrous fraction, organic carbon and temperature, besides the most probable number of total and thermotolerant coliforms and contents of nitrogen and macro and micro minerals. there was no effect of genotype and period on manure composting; however, the increase in the roughage level in the diet promoted the lower efficiency of the process. decrease of 100% in the most probable number of total and thermotolerant coliforms and increase in the nutrients content of the final compost were observed.
Composi??o Corporal e Requisitos Líquidos e Dietéticos de Macroelementos Minerais de Bovinos Nelore N?o-Castrados
Silva, Fabiano Ferreira da;Valadares Filho, Sebasti?o de Campos;ítavo, Luís Carlos Vinhas;Veloso, Cristina Mattos;Paulino, Mário Fonseca;Cecon, Paulo Roberto;Paulino, Pedro Veiga Rodrigues;Moraes, Eduardo Henrique Bevitori Kling de;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000300027
Abstract: forty nellore bulls, with 240 kg initial live weight (lw), were used. four were reference bulls, four were fed for maintenance, and the remaining were allotted to eight treatments, with four different concentrate levels in the diets (20, 40, 60, and 80%) and two levels of crude protein (cp) (15 and 18%). the growing phase was evaluated up to 360 kg of lw and the fattening phase, up to 450 kg of lw. cynodon dactylon (l) pears. (cv tyfton 85) grass hay was used as roughage. after slaughter, all animal body parts were weighed and sampled. the samples were freeze dried to determine the dry matter, pre-degreased with ether, grinded and the concentrations of macrominerals were determined. the ca, p, na and mg contents in the body were determined in function of their concentrations in the several body parts. the macrominerals contents retained in the body were determined by regression equations of the logarithm of the macrominerals contents in the body, in function of the logarithm of empty body weight (ebw). by deriving the prediction equations of macrominerals body content, in function of the logarithm of empty body weight (ebw), the net macrominerals requirements, for gains of 1 kg of ebw, were obtained by means of the equation y' = b. 10a. xb-1, being "a" and "b" the intercept and the regression coefficient, respectively, of the prediction equations of macrominerals body contents in the body. there was a decrease in the empty body and in the gain of empty body concentrations of the five macrominerals studied, with the increase of the live weight. the g ca/100 g relations of retained protein and g p/100 g of retained protein were 6.44 and 4.78, respectively.
Composi??o Corporal e Requisitos Energéticos e Protéicos de Bovinos Nelore, N?o-Castrados, Alimentados com Ra??es Contendo Diferentes Níveis de Concentrado e Proteína
Silva, Fabiano Ferreira da;Valadares Filho, Sebasti?o de Campos;ítavo, Luís Carlos Vinhas;Veloso, Cristina Mattos;Valadares, Rilene Ferreira Diniz;Cecon, Paulo Roberto;Paulino, Pedro Veiga Rodrigues;Moraes, Eduardo Bevitori Kling de;
Revista Brasileira de Zootecnia , 2002, DOI: 10.1590/S1516-35982002000200027
Abstract: forty nellore bulls, with average initial live weight (lw) of 240 kg, were used. four reference bulls and four bulls fed for maintenance were used, and the remaining was assigned to eight treatments, with four different concentrate levels in the diets (20, 40, 60 and 80%) and two (15 and 18%) levels of crude protein (cp). the protein, fat and energy contents retained in the body were estimated by regression equations of the logarithm of protein, fat or energy body content, as a function of the logarithm of empty body weight (ebw). by deriving the prediction equations of body content of protein, fat, or energy, as a function of the ebw logarithm, the net requirements of protein and energy, for gains of 1 kg ebw, were determined. the deriving equation was y = b. 10a. xb-1, being a and b intercept and regression coefficient, respectively, of the prediction equations of protein or energy body contents. net energy requirement for maintenance (nem) was estimated as the intercept anti-log of the equation obtained by linear regression among the logarithm of heat production and the metabolizable energy intake. the net energy requirement for weight gain of zebu bulls can be obtained by the equation: neg = 0.0413 x ebw0.75 x gain of ebw0.978. the nem for these animals was 83.70 kcal/ebw0.75. the following equation was obtained to estimate the retained protein (rp), as a function of ebw gain and retained energy (re): rp = - 39.0169 + 200.638 gain of ebw + 0.4166 re. the net protein requirement of nellore bulls decreased as the lw increased, being 183.22 and 173.72 g/kg of ebw gain for animals with 200 and 400 kg of lw, respectively.
Page 1 /509
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.