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Efeitos ambientais que influenciam as características de produção e qualidade de lã em ovinos da raça corriedale. [resumo]
No full textA identificação de animais geneticamente superiores para produção de lã é complexa, pois as características de interesse econômico, entre as quais, Peso de Velo Sujo (PVS, em kg), Diâmetro de Fibra (DF, em micras),Comprimento de Mecha (CM, em cm), emgeral, podem sofrer grande influência de fatores não genéticos, denominados, efeitos ambientais
Influence of different feeding strategies on carcass and meat quality of grassfed cull cows. [Influencia de diferentes estrategias de nutrición sobre la calidad de la canal y de la carne de vacas de descarte alimentadas con pasto]. [Influência de diferentes estratégias de alimentação na qualidade da carcaça e qualidade da carne de vacas de descarte alimentadas compastagem]
No full textABSTRACT.- Animal performance, carcass and meat quality characteristics of beef cull cows under different feeding strategies were compared. Cows were assigned to one of four grazing treatments combining different levels of forage allowance (FA) and supplementation rate (%of body weight, BW) using rice bran (RB): T1= FA2 % + RB0,T2 = FA4 % + RB0, T3= FA2 %+ RB 0.8 % and T4 = FA2 % + RB 1.6 %. Cows from T1 presented lower (P 0.05). Nonetheless, differences between treatments were found in n6 and n3 fatty acid contents (P 0.05). Sin embargo, se observaron diferencias en el contenido de los ácidos grasosn6 y n3 (P 0.05). No entanto, foram encontradas diferenças entre os tratamentos nos teores de ácidos graxos n6 e n3 (P < 0.05). Ouso estratégico de baixas taxas de suplementação com farelo de arroz em uma cultura forrageira de aveia melhor ou algumas características de qualidade da carne e carcaça de vacas de descarte
Marbling en Hereford: publicación del EPD para grasa intramuscular.
No full textEl marmoreo (marbling) cuantifica el contenido y distribución de la grasa intramuscular y ha sido una característica relevante en la producción de carne por su efecto principalmente en la palatabilidad, pero también en la terneza del producto cárnico. Las mediciones de ultrasonido son realizadas a los 18 meses de edad para toritos y vaquillonas que participan de la evaluación genética
Avances tecnológicos en el manejo de bovinos de carne.
No full textEn este capítulo se presenta una síntesis de información científica y tecnológica, promovida por INIA, asociada al manejo de ganado bovino de carne en sistemas pastoriles. En el mismo, se podrá ver la importancia de la aplicación de las buenas prácticas de manejo que, además de producir resultados productivos y económicos favorables, también genera un impacto directo y positivo en el bienestar del animal, un elemento fundamental ya reconocido como parte integral del sistema
¿Por qué se enceran los cítricos y qué aportan los recubrimientos?.
No full textLa aplicación de "ceras" durante el embalaje de los cítricos aporta a una variedad de objetivos. A través de un trabajo colaborativo, INIA junto con lasempresas citrícolas evalúa los recubrimientos más promisorios disponibles a nivel comercial. Esto permite realizar ajustes y cambios de manejo que favorecen su conservación en el proceso de exportación
Performance of Eucalyptus tereticornis provenances in subtropical climate. [Special Issue 25 Years Agrociencia].
No full textEucalyptus tereticornis has a wide natural geographic distribution from Papua New Guinea to South Australia (6º-38º S), therefore, it is expected the existence of important differences among provenances. Although differences in performance among provenances have been reported in several countries, the existing information is insufficient to allow the choice of the most appropriate provenance as a source of seeds for commercial plantations for humid subtropical climates. In order to evaluate the performance of 20 provenances of E. tereticornis in Uruguay and to generate information that contributes to the identification of the best provenances for humid subtropical climates, survival, individual tree volume, stem straightness and forking were assessed at 9-years-old in 4 sites in the center, north and northeast of Uruguay. Significant differences among provenances for all traits and significant provenance by site interaction for survival, individual tree volume and forking were found. No provenance was best in all sites. The Buckenbowra provenance had simultaneously high volume and survival. The absence of a clear regionalization, coupled with a significant provenance-by site interaction, suggests that local evaluation of different provenances is essential to identify appropriate seed sources, both for tree breeding and for use in commercial plantations.Copyright (c) 2022 Agrociencia Urugua
A meta-analysis of the effects of colostrum heat-treatment on its viscosity and IgG concentration, and the transfer of passive immunity in newborn dairy calves.
No full textABSTRACT.- Newborn ruminants depend on colostrum intake immediately after birth to obtain immunoglobulins for effective transfer of passive immunity (TPI). As colostrum may also be a vehicle of infectious agents, heat treatment of raw colostrum is a practice aimed at eliminating or reducing its pathogen load. Despite the usefulness of heat treatment in preventing the transmission of infectious colostrum-borne diseases, heat treatment of colostrum may have some side effects. A systematic review and meta-analysis were conducted to summarize the effects of colostrum heat treatment on its viscosity and IgG concentration, and serum IgG concentration as a proxy for TPI in newborn calves fed raw versus heat-treated colostrum. Moderators were studied to identify sources of heterogeneity. Literature databases were searched for peer-reviewed articles published between 1946 and 2022. A Master of Science thesis was also included. Five, 21, and 19 original publications were quantitatively evaluated in 3 separate meta-analyses, based on predefined selection criteria. Two-level and 3-level random effects meta-analysis revealed a significant overall effect of heat treatment on colostral viscosity and IgG concentration, and serum IgG concentration in newborns. © 2023 American Dairy Science Associatio
O57. Energy efficiency of beef cattle in grazing production systems - I. Effect of selection for residual feed intake. [conference abstract].
No full textResidual feed intake (RFI), the difference between actual and predicted dry matter (DM) intake, based on average daily gain (ADG) and metabolic body weight (BW0.75), is an interesting breeding objective because its positive impacts on production systems profitability, use of limited resources and environmental sustainability
Correction to: First large-scale study reveals important losses of managed honey bee and stingless bee colonies in Latin America (Scientific Reports, (2024), 14, 1, (10079), 10.1038/s41598-024-59513-6). [author correction].
No full textABSTRACT.- Correction to: Scientific Reportshttps://doi.org/10.1038/s41598-024-59513-6, published online 02 May 2024. The PDF version of this Article contained errors in Equations 1 and 2, where the equations were incompletely displayed. The correct equations are displayed below: (Formula presented.) (Formula presented.) The original Article has been corrected. © The Author(s) 2024
Avances en la sistematización de buenas prácticas para la gestión del pasto.
No full textEl proyecto "Gestión del Pasto" (FPTA 356) está en el punto medio de su ejecución, con dos años de mediciones y más de 85 talleres de discusión. El proyecto concentraesfuerzos en los insumos para la formulación de un manual de buenas prácticas para la gestión del pasto. Con la participación de los técnicos responsables de los laboratorios, las prácticas implementadas fueron agrupadas en cinco grandes "macrovariables" o factores clave y son el foco de este artículo