Recursos de colección

DIALNET OAI Articles (611.005 recursos)

DIALNET es una hemeroteca virtual, integradora de recursos y capaz de ofrecer servicios documentales y alertas informativas a sus usuarios. Sus principales objetivos son: * Aumentar la difusión y la accesibilidad de la literatura científica hispana. * Suministrar información actualizada de los contenidos de las revistas científicas que se publican en el ámbito hispano, tratando de abarcar el mayor número posible de revistas. * Emitir alertas informativas inmediatas a partir del momento de la publicación de nuevos ejemplares de las revistas que sean del interés de cada usuario. * Disponer de una base de datos de artículos científicos hispanos muy exhaustiva y actualizada, que permita desarrollos futuros que puedan redundar en beneficio de la comunidad de usuarios registrados.

Agricultura y alimentación

Mostrando recursos 1 - 20 de 15.647

  1. Effect of phytase supplementation for juveniles of tambaqui (colossoma macropomum)

    Mendonça, P. P.; Costa, P.C.; Polese, M.F.; Vidal, M.V.; Andrade, D.R.
    This experiment was conducted the Norte Fluminense State University Darcy Ribeiro in the aquaculture sector, aiming to evaluate the supplementation of phytase for juvenile tambaqui (Colossoma macropomum). It was used a total of 170 fingerlings with average initial weight of 3.12±0.05 g and initial total length with the average of 5.36±0.06 cm. The fingerlings were randomly distributed in 20 experimental tanks with an useful volume of 40 L, being the water supplied from a closed circulation system, equipped with a biological filter. The treatments consisted of five isoproteic and isocaloric diets (28% protein and 3100 kcal ED/kg diet), supplemented with...

  2. Productive characteristics of Kinosternon scorpioides, during copulation, ovarian activity, and hatching phases, in captivity in Amazon

    Costa, J.S.; Matos, A.S.; Marques, L.C.; Silva, C. S.; Figueiró, M.R.; Sales, R.L.; Da Silva Filho, E.; Guimarães, D.A.A.; Marques, J.R.F.
    The aim of this article was to study the indexes of muçuã (Kinosternon scorpioides) productive characteristics during copulation, egg laying and hatching, in order to provide an adequate management for the sustainability of the activity. 84 couplings, 742 egg laying and 1,979 births in captivity were analyzed, from which we determined the reproductive season and distribution of couplings; coupling duration; the sexual reason; duration of the egg development period (EDP), frequency of multiple egg laying; duration of nesting period; correlation between nesting time and the number of eggs; the number of viable eggs; the correlation between egg number, weight, length...

  3. Effects of supplementing cassava peels with cassava leaves and cowpea haulms on the rumen environment and blood profile parameters of West African dwarf goats

    Oni, A.O.; Oluwayemisi, A.; Adebayo, Kolawole; Iposu, S.; Sowande, O.S.; Onwuka, C.F.I.
    This experiment was conducted to evaluate the effects of supplementing cassava peels with cassava leaves and cowpea haulms on rumen fermentation and blood metabolites of West African dwarf (WAD) goats. Thirty West African dwarf bucks aged 8±1.3 months with an average body weight of 6.06±0.02 kg were used in a completely randomized experiment. The goats were randomly assigned to one of the five dietary treatments which consisted of milled cassava peels, cassava leaves and cowpea haulms in different ratios of 700:100:175 (T1); 500:200:275 (T2); 300:300:375 (T3) and 100:400:475 (T4) g/kg DM respectively. A standard diet formulated to meet the nutrient...

  4. Relación de la dieta con el color y la terneza de la carne vacuna

    Della Rosa, M.M.; Papaleo Mazzucco, J.; Aello, M. S.
    The sensorial quality of meat is important when consumers both purchase and eat it. When buying, color is most important, whereas tenderness is significant when eating. The color of the meat mostly depends on the concentration of myoglobin and pH, while tenderness is related to pH, collagen composition and myofibrillar degradation. Muscle fiber metabolism depends on the diet that the animals receive. Low-energy diets are associated with red fibers, oxidative metabolism, and increased myoglobin concentration. High-energy diets stimulate the development of glycolytic fibers, which have the ability to accumulate more glycogen. Myofiber metabolism also affects the content of proteolytic enzymes;...

  5. Potenciales de las fuentes no convencionales de proteína en la alimentación de animales no rumiantes

    Olarotimi, O.J.; Adu, O.A.
    This paper reviewed research on the use of non-conventional protein sources of plant origin for poultry in Nigeria and other neighbor countries. As the cost of compounded feed continues being a burden for the Nigerian farmers due to the current high cost of conventional protein sources such as fishmeal, groundnut cake and soybean meal, it is very urgent to explore the potentials of non-conventional alternative sources of protein, especially the leaf meals of some plants, such as Moringa oleifera, Leucaena leucocephala, Manihot esculenta, Carica papayaand other leguminous fodders which can, to some extent, replace the inclusion of the conventional sources...

  6. Parâmetros genéticos para características de crescimento e reprodutivas em bovinos Nelore no Brasil

    Carneiro, P.L.S.; Rezende, M.P.G.; Ramos, I.O.; Filho, R. Martin; Malhado, C. H. Mendes; Barbosa, A.C.B.
    To know the genetic and phenotypic progress of a population is important to evaluate the outcome of the adopted selection programmes and as guiding elements of future actions. The objective was to estimate genetic parameters, genetic and phenotypic trends of weights at 205 (W205) 365 (W365) 550 (W550) days of age, age at first calving (AFC), scrotal circumference (SC) and calving interval (CI) of 175.231 Nellore, born in the period 1967-2011 in the Northeast region of Brazil. The components of (co) variance and breeding values were obtained by restricted maximum likeli-hood methodology. Estimates of heritability coefficients for growth traits were...

  7. Supplementation with coconut oil for piglets until weanin

    Deminicis, B.B.; Mendoça, P.P.; Paula, M.O.; Moreira, Y.R.
    This study evaluated the performance and mortality of piglets from birth to weaning undergoing a diet supplemented with coconut oil, as well as performed the environmental characterization of facilities. The experiment was carried out using pig maternity facilities. The experimental design consisted of a completely randomized block design with two treatments, eight blocks and twelve piglets per experimental unit. The supplemented piglets received 12 ml of coconut oil. Piglets creeps provided stable conditions in the hottest hours of the day for the stalls. The relative humidity remained below the optimal levels for pigs at the hottest times of the day;...

  8. Caracterización comercial y nutricional de la grasa subcutánea de terneros y vacas de desvieje sacrificados en la Comunidad Autónoma del País Vasco

    Aurtenetxe, M.; Belaunzaran, X; Bravo Lamas, L.; Gamarra, D.; Barron, L. J. R.; Aldai, N.
    The present work was undertaken to compare the commercial carcass quality and the fatty acid composition of subcutaneous fat from Friesian culled cows of over 30 months of age, and calves of 12 months of age from Pirenaica and Salers breeds slaughtered in a commercial abattoir in the Basque Country. Friesian culled cows provided lighter carcasses (p<0.05), although similar to calves from Pirenaica breed, with lower conformation (p<0.001) and less fat cover (p<0.01) compared to other groups of calves. The subcutaneous fat of culled cows provided higher content of saturated (p<0.001) and branched-chain fatty acids (p<0,05), and lower content of...

  9. Níveis de glicerina bruta na ração de suínos nas fases de crescimento e termina

    Bordignon, G.; Lima, H.J.D.; Martins de Souza, R.A.; Fonseca, M.M.
    The objective of this study was to evaluate the effect of different levels of crude glycerine in the rations on the performance of growing and finishing pigs. 60 F1 pigs (30 males and 30 females), deriving from the cross between Naïma females and commercial line P76 males, with an initial weight of 18.46 ± 1.38 kg, distributed in a completely randomized design, with 4 treatments and 5 replications, with 3 animals per experimental unit. The rations were formulated on the basis of corn and soybean meal, with the inclusion of 0, 5, 10 and 15% of crude glycerine. The performance...

  10. Valores econômicos para as características de produção, funcionais e de fertilidade em sistemas de produção de leite no Sul do Brasil

    Cervo, H.J.; Barcellos, J.O.J.; Colle, G.; McManus, C.; Peripolli, Vanessa
    The objective of this study was to predict the economic values for production, functional and fertility traits, as well as to rank them in order of economic importance for milk production systems in southern Brazil. For this, two clusters were formed according to their production and the characteristics considered were: milk production (MP), lactation persistency (LP), milk fat (FAT), milk protein (PROT), somatic cell count (SCC), age at first calving (AFC), calving interval (CI), feed intake (Intake), mortality (MORT) and cow weight (CW). Revenue was based on the sale of milk, surplus heifers and cull cows and the actual operating...

  11. Complexo enzimático na alimentação artificial de abelhas africanizadas

    Lima, M.V.; Soares, K.O.; Evangelista Rodrigues, A.
    This study aimed to identify efficient feed for Apis mellifera L. bees using an enzyme complex to improve the performance of the swarms in periods of food scarcity. In order to achieve this objective, closed brood frames were removed from two beehives, led to a climatic chamber and after the emergence of the bees, they were kept in experimental units to be fed. The diet used in the research was composed of 60% of honey, 30% of soy flour and 10% of corn flour, with different levels of inclusion (0.00%, 0.03%, 0.06%, 0.09%) of the enzyme complex. The parameters evaluated...

  12. Efecto de la inclusión de zeolita (clinoptilolita) en ovinos en etapa de finalización: Respuesta productiva y energética de la dieta

    Estrada Angulo, Alfredo; Coronel Burgos, F.; Castro Pérez, B.I.; López Soto, M.A.; Barreras, A.; Angulo Montoya, C.; Contreras Pérez, G.; Plascencia, A.
    The aim of this study was to evaluate the effect of different supplemental levels (0, 1.5, 3 and 4.5%) of zeolite in total mixed finishing diets on the productive response and efficiency of using dietary net energy in hairy lambs. For this aim, 40 ¾Katahdin × ¼Pelibuey lambs (initial weight = 32.28 ± 2.34 kg) were assigned to 20 pens (2 lambs/pen, 5 pens/treatment) and were fed for 75 days on one of the four treatments. Control diet (no supplemental zeolite) contained 16.51% CP and 1.39 McalNEg/kg, and the total quantity of zeolite included replaced corn and soybean meal in...

  13. Aumento das doses dietéticas de líquido de casca de castanha de caju na digestibilidade ruminal e intestinal de nutrientes em novilhos alimentados com uma dieta rica em grãos

    Osmari, Milene Puntel; Branco, A.F.; Diaz, T.G.; Matos, L.F.; Goes, R.H.T.B.
    Objetivou-se avaliar os efeitos da inclusão do líquido da casca da castanha de caju (LCCt) na dieta de bovinos alimentados com dietas ricas em grão, sobre a ingestão e o coeficiente de digestibilidade ruminal e total dos nutrientes; as características de fermentação ruminal, eficiência de síntese microbiana no rúmen e parâmetro sanguíneo, através do nitrogênio ureico plasmático. Foram utilizados quatro novilhos da raça Holandesa (445 ± 23,39 kg de peso vivo) providos de cânula ruminal e duodenal, recebendo uma dieta com 144 g kg-1 de proteína bruta e 799 g kg-1 de nutrientes digestíveis totais, com uma relação volumoso:concentrado de...

  14. Características produtivas e estruturais de genótipos de palma forrageira irrigada em diferentes intervalos de corte

    Rocha, R. S.; Voltolini, T.V.; Gava, C.A.T.
    The spineless cactus receiving additional water may constitute alternative food for the flocks of the Brazilian semiarid; however, the information about structural and productive responses of genotypes, as well as the cutting intervals are scarce. This research aimed to evaluate the productive and structural characteristics of genotype at different cutting intervals. The experimental design was a randomized block with split plot (genotypes in the plots and cutting intervals in the subplots), with four replicates per treatment, totaling 48 experimental units. The experiment was conducted from May 2014 to September 2015, with three genotypes of cactus, the orelha de elefante mexicana...

  15. Revalorización de las aptitudes laneras de los biotipos ovinos de la región central argentina

    Gómez, M.B.; Castillo, M.; Hick, Michel Victor Hubert; Frank, E.N.; Castillo, M. F.
    In the central area of Argentina, there are sheep farms with heterogeneous individuals possessing heterogeneous denominations, whose production is aimed at a butcher purpose, producing wool of varying quality, which mostly corresponds to a heavy type, greater than 28 microns. The possibility of wool blends to highlight virtues that enables them to profit as the upholstery industry and carpet weaving should be considered, as the industry requires certain characteristics in wool quality variables, such as bulk, so that it is used efficiently. The aim of this study was to characterize the production of sheep wool in central Argentina, for their...

  16. Substituição total do milho pela polpa cítrica no concentrado de bezerros leiteiros

    Coimbra, E.P.; Azevedo, R. A.; Reis, R.B.; Saturnino, H.M.; Coelho, S.G.
    This aim of this study was to evaluate the effects of replacing corn by citrus pulp in the starter on the performance and ruminal parameters of calves up to 60 days of age. The Holstein calves (n= 36) were used, of which 28 were used for analyzes of consumption and performance and 8 to study the parameters of ruminal fermentation and profile of blood glucose. At the end, 4 animals from each treatment were euthanized for ruminal analysis. The starter intake was different among treatments in 5 to 9 week of age, being higher for the group fed corn compound...

  17. Evaluación de diferentes niveles de inclusión de plantas nativas de sabanas inundables sobre una dieta basal de Brachiaria humidicola y su efecto sobre la producción de metano in vitro

    Vélez, O.M.; Campos, R.; Sánchez, H.; Giraldo, Luis A.
    The effect on methane production of increasing levels (25, 50 and 75%) of five native plants from the floodable savannas (Senna occidentalis, Enterolobium schomburgkii, Galactia jussiaeana, Belencita nemorosa y Ambrosia peruviana), on a Brachiaria humidicola based diet were evaluated. The treatments were anaerobically incubated with ruminal fluid at 39 °C for 24 h, after the incubation period, gas production, methane, volatile fatty acids (VFA), ammonia and dry matter degradation (DMD) were determined. The inclusion of 50 and 75 % of all plants in the diet, increased the ruminal ammonia content, with values between 189-282 mg/L. None of the plants modified...

  18. Efecto de la suplementación del diluyente sobre la calidad del semen de asno a la descongelación

    Montoya, J.D.; Rojano, B.; Restrepo, G.
    Freezing of donkey semen allows storing genetic material for an unlimited period of time, which can be used to generate germoplasm banks or for breeding of mules or asses. This research aimed to evaluate supplementation alternatives for freezing donkey semen. Semen from five Colombian creole donkeys (n= 10) was collected and then frozen in Equiplus® extender supplemented with 3% of glycerol (GLY) or 5% of dimethylformamide (DMF), 2% or 5% of centrifuged egg yolk (CEY) and 10% or 20% of seminal plasma (SP). Post-thaw evaluation of semen quality and lipid peroxidation (LP) was conducted. For statistical analysis mixed models were...

  19. Cinética de fermentação ruminal in vitro de dietas com inclusão do resíduo de feijão (Phaseolus vulgaris L.) substituindo a torta de algodão

    Ferro, M.M.; Zaine, A. M.; Ferro, R.M.; Souza, A.L.
    The objective of this research was to evaluate the ruminal fermentation parameters of in vitro bean (Phaseolus vulgaris L.) residue inclusion in replacement of cottonseed meal. The experimental treatments were the replacement of cottonseed meal at levels of 0, 33, 66 and 100% by bean residue. The sample preparation was performed using 500 mg of air dried sample, ground to 1 mm, inwhich, right after the addition of the inoculum, flasks received rubber stopper, aluminum seal and were placed in a water bath, with orbital shaking, at 39ºC. Pressure readings were taken using a pressure transducer at the following times:...

  20. Avaliação de curvas de crescimento em suínos

    Nascimento, C.A.M.S.; Ribeiro, N.M.; Rocha, L.L.; Lucena, L.R.R.
    Objetivou-se simular pesos de suínos machos e fêmeas (de 1 a 157 dias de idade) através da distribuição de probabilidade uniforme num intervalo [a,b]. Foram ajustados os modelos de regressão (logístico, potência, tangente hiperbólica, gamma e polinomial cúbico) para explicar a possível relação do peso com o número de dias dos suínos. Verificou-se que os modelos logístico, gamma e polinomial cúbico apresentaram as melhores estimativas para explicar o comportamento do peso dos suínos machos e fêmeas. O modelo logístico apresentou R²= 0,975 e AIC=13,34 para os machos e R²= 0,9787 e AIC= 10,16 para as fêmeas. O modelo gamma apresentou...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.