RESUMOConsiderando a importância do uso da ensilagem como alternativa dos sistemas de alimentação animal, essa revisão objetiva apresentar resultados recentes disponíveis na literatura sobre alguns fatores que afetam o valor nutritivo da silagem, notadamente de forrageiras tropicais. A utilização de silagem na alimentação animal é uma prática importante na sustentabilidade dos sistemas produtivos, considerando os custos com alimentação animal, principalmente nos períodos seco do ano. A ensilagem de subprodutos da indústria pode ser uma importante ferramenta para diminuir a dependência de insumos externos, além de diminuir a contaminação ambiental por esses resíduos. As mudanças e perdas durante a ensilagem são influenciadas pelas características da planta forrageira e estão também associadas às práticas de manejo, colheita e armazenamento. Os fatores que influenciam no processo de ensilagem são muitos e agem isoladamente ou interagem entre si, que precisam ser considerados para obtenção de silagem de maior qualidade e mais estáveis. Resultados sobre a aplicação de aditivos enzimáticos ou sua associação com inoculantes em forrageiras tropicais são controversos na literatura disponível e dependentes das condições locais, concentração e tipo de inoculante, método de aplicação, qualidade da planta forrageira, microflora pré-existente, entre outros fatores. SUMMARYConsidering the importance of silage as alternative for animal feeding systems, this review aims to present recent results available in literature on factors affecting the nutritive value of silage, especially in tropical forages. Considering the cost of feed, the use of silage as animal feed is an important practice in the sustainability of production systems, especially in dry periods of the year. The ensiling of by-products of industry may be an important tool to reduce the dependence on external inputs, and reduce the environmental contamination by these residues. Changes and losses during ensilage are influenced by the characteristics of the fodder plant and are also associated with management, harvesting and storage practices. The factors that influence the process of ensilage are numerous and act alone or interact with each other, which should be considered to obtain silage of higher quality and more stable. In relation with the application of, enzymatic additives or its association with inoculants, in tropical forage, the results available in the literature are controversial and dependent on local conditions, concentration and type of inoculum, method of application, quality of forage plant, and present microflora, among other factors. INTRODUÇÃOO uso de silagens de forrageiras tropicias

El proceso editorial de Archivos de Zootecnia durante el 2015 se muestra a continuación. Se recibieron un total de 345 manuscritos procedentes de 24 países, siendo Brasil el país que ha contribuido en mayor medida (casi el 70%). Consecuentemente, el lenguaje más usado en los trabajos fue el portugués, seguido del español y el inglés. En 2015 se editaron un total de 71 publicaciones: 54 artículos, 13 notas breves y 4 revisiones. Los trabajos procedían de 15 países. Los principales temas objeto de publicación fueron Alimentación y Alimentos (n= 36, 40 %) y Razas y Genética (n= 19, 21,1 %); mientras que la principal especie sobre la que se publicó fue la especie bovina (n= 24, 26,67 %). Los tiempos editoriales entre la recepción y publicación de los trabajos han mejorado con respecto a los últimos años de acuerdo a los resultados mostrados en informes editoriales previos.

________________________________________________________________________________ AbstractData collected on metabolizable energy (ME) intake and growth performance of preruminant female kids of the Murciano-Granadina breed was used to assess the accuracy of the latest U. S. National Research Council (NRC) recommendations to predict their energy requirements. Female kids were fed a milk replacer individually, according to appetite three times a day from two to five weeks of age. The mean initial body weight and average daily weight gain (± SE) were 3.31 ± 0.08 kg/d and 120 ± 3 g/d. Daily ME intake, expressed relative to metabolic body weight (BW 0.75 ), decreased linearly with age from 1085 to 970 kJ/kg BW 0.75 /d, and there was nearly a constant ratio of ME requirements for maintenance. The observed ME intake was 5.4% higher than the ME requirements, calculated according to NRC, probably due to the energy content of the weight gain. It was concluded that the energy system model of the NRC is accurate enough to calculate the ME requirements of preruminant female kids of the Murciano-Granadina breed. ________________________________________________________________________________

The influence of feed evaluation system and type of forage in the rations for three, eight and twelve months old goats optimized through minimum cost linear programming was studied. The rations included one of three forages (lucerne hay, oat hay or cereal straw). The energy and protein supply and requirements were derived according to NRC (2007) or INRA (2007. The calculated energy intake and the cost of the rations were different between the systems, whereas there were no differences in the calculated intake of protein, forage and concentrate. Cereal straw and oat hay rations were the most cost-effective (P<0.05) regardless of the age group or the system used. It was concluded that the choice between NRC (2007) and INRA (2007) to formulate rations for young growing dairy goats through minimum cost linear programming is not relevant from both nutritional and economic points of view. Oat hay and cereal straw could be valid substitutes for lucerne hay as roughage source when designing rations for young growing dairy goats.

Archivos de Zootecnia alcanzó su número 256 en 2017. En el presente Informe Editorial se recogen los hechos y cifras derivadas del proceso editorial durante el pasado ciclo editorial anual. Archivos de Zootecnia querría mostrar su más sincera gratitud hacia los Editores Sectoriales involucrados en el proceso editorial y los Revisores sin cuya labor nuestro trabajo no sería de otro modo posible. Se recibieron un total de 597 manuscritos. Aunque Brasil fue aún el país que contribuyó con el mayor número de manuscritos, los envíos ligeramente descendieron (61.17%) en favor de un aumento de los envíos por parte de autores de otros países. Por tanto, el idioma más frecuentemente utilizado fue el portugués, seguido del español y el inglés. 85 trabajos fueron publicados en 2017: 63 artículos, 10 notas cortas y 12 revisiones. Los trabajos publicados procedían de 8 países. Los dos temas principales objeto de publicación fueron “Alimentación y Alimentos” (n=38, 45.78%) y “Razas y Genética” (n=7, 8.43%); mientras que la principal especie sobre la que se publicó fue la especie bovina (n=22, 30.99%) seguida por la especie ovina (n=11, 15.49%). Los tiempos editoriales entre la recepción y publicación de los trabajos se han mantenido con respecto a los últimos años de acuerdo a los resultados mostrados en informes editoriales previos.

sUMMAryThe editorial process of Archivos de Zootecnia during 2014 is reported below. A total of 278 manuscripts coming from 24 countries, mainly from Brazil (70 %), were received. Consequently, the most frequently used language in the manuscripts was Portuguese, followed by Spanish and English. 90 works were published in 2014: 58 articles, 19 short notes and 13 reviews. The writings came from 15 countries. The two main subjects published have been: Feeding and foods (n= 36, 40%) and Breeds and genetic (n=19, 21.1 %); while the main species is cattle (n= 24, 26.67%). The editorial times between the reception and publication of the manuscripts have improved compared to the previous years.Arch. Zootec. 64 (245) Archivos de Zootecnia. Informe editorial 2014El presente trabajo analiza el proceso editorial durante el año 2014. Se recibieron un total de 278 manuscritos procedentes de 24 países, principalmente de Brasil (70 %). Consecuentemente, el lenguaje más usado en los trabajos fue el portugués, seguido del español y el inglés. En 2014 se editaron un total de 90 publicaciones: 58 artículos, 19 notas breves y 13 revisiones. Los trabajos procedían de 15 países. Los principales temas objeto de publicación han sido Alimentación y Alimentos (n= 36, 40 %) y Razas y Genética (n= 19, 21.1 %); mientras que la principal especie sobre la que se ha publicado ha sido el bovino (n= 24, 26.67 %). Los tiempos editoriales entre la recepción y publicación de los trabajos han mejorado con respecto a los últimos años. resUMen PAlAbrAs clAve AdicionAlesRevistas científicas. Trabajos científicos.

SUMMARYThe editorial process of Archivos de Zootecnia during 2010 is reported below. A total of 384 manuscripts were received from 33 countries, mainly from Brazil (66.9%). Consequently, the language most frequently used in the manuscripts was Portuguese, followed by Spanish and English. The mean time between submission and publication of a manuscript was 836.3 days. The rejection rate was 50.8%. In 2010, 49 articles, 21 short notes and 10 reviews (total 83) were published by authors coming from 15 countries. RESUMENSe analiza el proceso editorial de Archivos de Zootecnia durante 2010. Se recibieron 384 manuscritos procedentes de 33 países, principalmente de Brasil (66,9%). Consecuentemente, el lenguaje más frecuentemente usado fue el portugués, seguido del español y el inglés. El tiempo medio entre recepción y publicación de un manuscrito fue elevado ( 836.3 dias). La tasa de rechazo fue del 50,8%. En 2010 fueron publicados 49 artículos, 21 notas breves y 10 revisiones (83 trabajos en total) cuyos autores pertenecían a 15 países diferentes. INTRODUCTIONIn the editorial reports of previous years, excesive long times from submission to printing, were reported. As the economic crisis scene remains, budgetary reasons continue avoiding the increase of number of pages published yearly, and, therefore, to achieve shorter editorial times is a persistent, and resistent, task. METHODOLOGICAL CONSIDERATIONSThe editorial report of 2010 follows the same methodology described in the 2009 editorial report (http://www.uco.es/organiza/servicios/publica/az/php/img/web/ 28_18_39_01EditorialReport2009.pdf) (Gómez Castro et al., 2010). Figure 1 shows the annual progress of manuscripts received since the creation of our web site (May 2005). The annual number of manuscripts received and managed by Archivos de Zootecnia has remarkably increased ever since. RECEIVED MANUSCRIPTSThe number of manuscripts went from 342 received in 2009 to 384 in 2010, which suggests that appeal of Archivos de Zootecnia among researchers is still increasing. The 384 manuscripts received in 2010 were classified in 291 original research articles, 53 short notes, and 40 literature reviews. Most of the manuscripts submitted (66.9%) came from Brazil (table I), a figure which is some lesser than the previous year, probably due to negative effect of the long editorial times although the increasing positiveArchivos de zootecnia vol. 60, núm. 229, p. 4. GÓMEZ CASTRO, LÓPEZ DE BUSTAMANTE, PEREA MUÑOZ Y ARCOS CASTEJÓNevaluation of Archivos de Zootecnia, maintains this high preference. Studies originating from Mexico, Nigeria, and Spain, represented an additional 22.0%, and the remaining 9.1%, came from other 30 countries, in proportions very similar (all lower than 2,0%) and generally within the scope of projection of the journal. It is remarkable that the spectrum of countries is amplified to 10 new countries respect 2009. As shown in table II, the origin of the manuscripts is reflected on the language used. However the Portuguese represents 57.8%, which is lower th...

The editorial process of Archivos de Zootecnia during 2008 is reported below. A total of 294 manuscripts were received from 24 countries mainly from Brazil (73%). Consequently, the language most frequently used in the manuscripts was Portuguese, followed by Spanish and English. The mean time between reception and publication of a manuscript was high (657 days). The rejection rate was 35.7%. In 2008, 42 articles, 30 short notes and 10 reviews (total 82) were published from 13 countries.