Vinícius Pereira Guimarães

• PhD
• Head of Department at Brazilian Agricultural Research Corporation (EMBRAPA)

Cette étude a été entreprise afin de caractériser la diversité des systèmes d’élevage caprin et identifier les principales contraintes et opportunités pour leur durabilité dans les différentes zones agro-écologiques du Bénin. Les données collectées sur 478 troupeaux caprins ruraux élevés dans quatre communes du Bénin ont été soumises à une analyse...

Brazilian goat and sheep farming has increased their activities in the past years, with an increase of the number of flocks, of farms with sheep and goats, of animals and volume of dairy products sold. We observed an improvement of the professionalization of the activity, with added - value products and the creation of cooperatives and other collec...

The objective of this study was to evaluate the subjective, chemical and sensorial meat characteristics of ½ Santa Inês (SI) x ½ No Defi ned Racial Standard (NDRS) and ½ Brazilian Somalis (BS) x ½ No Defi ned Racial Standard (NDRS) crossbred lambs, fi nished in confi nement. Sixteen uncastrated male lambs with initial weight of 19.7 ± 2.03 kg and a...

In order to identify the most promising browse species for sustaining goat production, the nutritional characteristics of leaves of trees and shrubs and their use in farmers’ feeding strategies were assessed in sub-humid areas of Benin. Two hundred and forty (240) goat farmers were surveyed and their uses of different leaves of trees and shrubs for...

Avaliou-se o desempenho produtivo e características quantitativas e qualitativas de carcaça e dos não-componentes de carcaça de cordeiros SPRD (Sem Padrão Racial Definido) cruzados com as raças Santa Inês (SI) e Somalis Brasileira (SB) terminados em confinamento. Foram utilizados 16 cordeiros desmamados, machos, não castrados, com peso inicial 19,7...

Objetivou-se avaliar o desempenho produtivo e econômico do confinamento de ovinos mestiços Morada Nova alimentados com diferentes fontes proteicas na ração concentrada em substituição ao farelo de soja. Três diferentes fontes proteicas alternativas foram utilizadas substituindo o farelo de soja: o feno do folíolo da leucena (FFL) e a ureia, ambas s...

To evaluate the productive and economic performance of the feedlot of Morada Nova crossbred sheep fed different protein sources in concentrate ration to replace soybean meal this study was conducted. Three different alternatives protein sources were used replacing soybean meal: Leucaena leucocephala leaflet hay (FFL) and urea, both replacing 100%,...

We evaluated the growth performance and quantitative and qualitative characteristics of carcass and non-carcass components of crossbred lambs meat (1/2 undefined breed -SPRD x 1/2 Santa Inês - SI and 1/2 SPRD x 1/2 Somalis Brasileira - SB) finished in feedlot. We used 16 lambs weaned males, intact, with an initial weight of 19.7 ± 2.0 kg and about...

To evaluate the productive and economic performance of the feedlot of Morada Nova crossbred sheep fed different protein sources in concentrate ration to replace soybean meal this study was conducted. Three different alternatives protein sources were used replacing soybean meal: Leucaena leucocephala leaflet hay (FFL) and urea, both replacing 100%,...

The semiarid region has suffered over the years a process of severeenvironmental degradation. The agricultural indicators are far below those necessary forthe generation of income in the country capable of maintaining the rural population. In thisscenario, the conservation of biodiversity becomes a key to maintaining the quality of life.Agroforestr...

Agroforestry Systems (SAF) are shown as an alternative to social andeconomic consequences of human action on the environment. We sought to determinethe dynamics of biomass production and the stock of CO2 equivalent in the SAF, in anarea of “caatinga” biome in the state of Ceará. The study area comprised the SAF inCrioula farm, belonging to the Nati...

In order to minimize the impacts of human action on the “Caatinga” biome,Embrapa developed a agroforestry system (SAF) for semi arid areas that provide benefitsto the productive system and environmental services. The objective of this study was tofind a value for environmental services - carbon sequestration, generated by a SAFlocated in Sobral, CE...

No contexto de elevada concorrência e incertezas, o planejamento dos sistemas de produção torna-se, muitas vezes, uma realidade distante e falha, sendo, necessários novos modelos de produção. A modelagem de sistemas de produção apresenta-se, atualmente, como uma possível ferramenta para minimizar essas perdas. Este trabalho objetivou desenvolver um...

O planejamento e um instrumento indispensavel ao sucesso de um empreendimento. O uso de modelos matematicos e instrumentos computacionais mostram-se interessantes como ferramentas a tomada de decisoes. Objetivou-se desenvolver um modelo capaz de estimar a dinâmica da demanda de mao-de-obra, em um sistema de producao de carne e pele ovina, identific...

The understanding of a dairy goat production system is crucial to establish a more competitive activity. Therefore, a simulation model was built to evaluate the dynamics of dairy goat herd under different scenarios of production. A System Dynamics approach was used to identify management policies that affect the behavior of the herd. All parameters...

The reduction in goat milk production and the competitiveness of more profitable activities have increased the adoption of measures to enhance goat milk and meat around the world. A simulation model was built to evaluate the dynamics of a dairy goat herd under different scenarios of production. A System Dynamics approach was used to identify manage...

Objetivou-se com este estudo comparar funções matemáticas propostas na literatura para o ajuste da curva de lactação em caprinos leiteiros. Foram utilizados 23.502 controles leiteiros, totalizando 748 lactações de cabras das raças Saanen e Alpina. A estimativa dos parâmetros foi feita por meio de regressões não-lineares, pelo procedimento NLIN do p...

Production of low cost milk is the most relevant aspect in dairy goat systems. Therefore, studying the behavior of the lactation curve of dairy goats is important to implement animal breeding programs as well as for plan and introduce new management tools. The objective of this study was to select among mathematical models published in the literatu...

1. Sobre os sistemas (unidades) de produção Ao se fazer referência a sistemas de produção, entenda-se aqui de qualquer espécie, o conceito genérico destes sistemas deve considerar uma realidade agrícola e social. Expressar que um sistema de produção faz parte da realidade agropecuária e social é dizer que está em função de um contexto voltado para...