Yes / Solar energy, amongst all renewable energies, has attracted inexhaustible attention all over the world as a supplier of sustainable energy. The energy requirement of major seawater desalination processes such as multistage flash (MSF), multi-effect distillation (MED) and reverse osmosis (RO) are fulfilled by burning fossil fuels, which impact the environment significantly due to the emission of greenhouse gases. The integration of solar energy systems into seawater desalination processes is an attractive and alternative solution to fossil fuels. This study aims to (i) assess the progress of solar energy systems including concentrated solar power (CSP) and photovoltaic (PV) to power both thermal and membrane seawater desalination processes including MSF, MED, and RO and (ii) evaluate the economic considerations and associated challenges with recommendations for further improvements. Thus, several studies on a different combination of seawater desalination processes of solar energy systems are reviewed and analysed concerning specific energy consumption and freshwater production cost. It is observed that although solar energy systems have the potential of reducing carbon footprint significantly, the cost of water production still favours the use of fossil fuels. Further research and development on solar energy systems are required to make their use in desalination economically viable. Alternatively, the carbon tax on the use of fossil fuels may persuade desalination industries to adopt renewable energy such as solar.

Submitted by Maria Beatriz Vieira (mbeatriz.vieira@gmail.com) on 2017-03-29T16:09:16Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dissertacao_silmara_salete_baruffi.pdf: 784718 bytes, checksum: 69af8ae175b1ddceac959b5c1b20d718 (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:55:59Z (GMT) No. of bitstreams: 2 dissertacao_silmara_salete_baruffi.pdf: 784718 bytes, checksum: 69af8ae175b1ddceac959b5c1b20d718 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2017-04-05T17:57:15Z (GMT) No. of bitstreams: 2 dissertacao_silmara_salete_baruffi.pdf: 784718 bytes, checksum: 69af8ae175b1ddceac959b5c1b20d718 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-05T17:57:25Z (GMT). No. of bitstreams: 2 dissertacao_silmara_salete_baruffi.pdf: 784718 bytes, checksum: 69af8ae175b1ddceac959b5c1b20d718 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2015-12-23 / Sem bolsa / O agronegócio no Brasil alavanca a economia. A principal cultura econômica do segmento é a soja, que a cada ano supera o volume de produção e a motivação dos produtores mostra que vai continuar, mas pouco em função da expansão em áreas novas, mas sim por incremento de produtividade. A evolução da produtividade obtida nas últimas décadas teve muita contribuição do melhoramento genético e produção de sementes de qualidade que é o veículo mais eficiente de adoção de novas tecnologias por parte dos agricultores. Em contrapartida a evolução na gestão dos negócios ainda é pequena, falta foco na gestão econômica e financeira além da gestão da produção, ainda serão necessários investimentos na sua aplicação no dia a dia como ferramenta de gerenciamento para o resultado. Ter altas produtividades é fundamental para a longevidade das propriedades/empresas, mas conhecer os custos de produção e os itens que tem relevância na sua construção é o que fará diferença na assertividade das decisões. Desta forma, objetivou-se neste trabalho analisar o histórico do custo de produção de soja com ênfase no entendimento da participação do insumo semente, em 32 propriedades localizadas no Rio Grande do Sul que tem a cultura da soja com o principal atividade econômica e são assessoradas pela empresa Agros. Foram analisados os dados históricos disponíveis e realizado levantamento detalhado dos custos de insumos da safra 14/15. Os resultados mostram que: a semente é um item de importância relativamente baixa no custo dos insumos em comparação à sua relevância na construção da produtividade; os investimentos realizados com aquisição de sementes com qualidade de cultivares novas são evidenciados em incremento de produtividade; o custo de defensivos aumentou significativamente em função de problemas e situação de pragas no campo que as tecnologias existentes na semente não contemplam o controle eficiente; as margens obtidas com a cultura da soja, estão diretamente associadas com a produtividade e não mantem relação direta com o custo de produção. Estas informações são fundamentais para que o agricultor use na tomada de decisão, e que sempre que tiver necessidade de reduzir custo de produção, perceba que não está na semente o ponto de ajuste. / Agribusiness in Brazil leverages the economy, the main economic crop is soybeans, which every year exceeds the volume of production and the movement of farmers shows that it will continue, but little by expansion into new lands, but by increased productivity. The evolution of productivity achieved in recent decades has much contribution of genetic improvement and quality seed production, which is the most efficient vehicle of adoption of new technologies. In contrast to developments in business management is still small, lack focus on economic and financial management in addition to production management, will still be necessary investments in its application as a management tool for the result. Having high productivity is key to the longevity of properties / companies, but knowing production costs and items that have relevance in its construction is what will make a difference in assertiveness of decisions by farmers. Thus the aim of this work was to analyze the history of soybean production costs with emphasis on understanding of the role of seeds. It was used 32 properties located in Rio Grande do Sul that have soybean crop with the main economic activity and are advised by the company Agros. Historical data were analyzed and conducted detailed survey of the input costs. The results show that: the seed item has a relatively low importance in cost of inputs, when compared to its importance in the construction of productivity; investments in seed by acquiring new cultivars are evidenced in productivity growth, the cost of agrochemicals significantly increased as a result of problems and situation of pests field that existing technologies in seeds does not include; the margins obtained from the soybean, are directly associated with productivity and keeps directly related to the cost of production. This information is fundamental for the farmer to use in his decision-making, and that whenever he needs to reduce production costs, realize that is not in the seed the set point.

Made available in DSpace on 2016-04-28T14:59:41Z (GMT). No. of bitstreams: 1 Almira Biazon Franca.pdf: 424732 bytes, checksum: 6b668d3884ce7bf7de269eed230cab2b (MD5) Previous issue date: 2010-03-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This work aimed to evaluate the effects of inclusion of bakery waste (BW) in sheep diets on intake, apparent digestibility, balance of nitrogen compounds and ruminal parameters, and determine the carbohydrates and nitrogenous fractions of food and diets. Five levels of corn replacement by BW (0, 25, 50, 75 and 100%) were studied, using five male lambs with live weight of 30 kg, in a Latin square 5 X 5 design. The experimental diets were composed of concentrate and hay Tifton 85 (Cynodon spp) in a forage:concentrate ratio of 60:40. To determine the intake and digestibility were collected samples of food, orts and feces. Urine was collected in buckets for a period of 24 hours to determination of nitrogen balance. Data were interpreted with to variance analysis and regression, using the t test at 5% significance. The BW present higher value for the non fiber carbohydrate and protein fraction with fast ruminal degradation (A+B1), which brought a greater proportion of these fractions in diets replacing 100% of corn by the BW and greater timing of energy supply and protein in the rumen. There wasn t effect (P>0.05) levels of substitution of intake, digestibility of nutrients, balance of nitrogen compounds and weight gain. Different levels of substitution didn t affect (P>0.05) pH values and concentrations of volatile fatty acids, but for the concentration of ammonia nitrogen (N-NH3) was found linear reduction (P<0.05) with the level of replacement, in which each 1% BW promoted reduction of 0,11 mg/dL in the concentration of N-NH3, which may be related to increased ruminal availability of energy, which allows greater use of ammonia for microbial growth. The addition of BW caused a reduction of 51,15% in the cost of ration. It was concluded that the BW can replace the corn in concentrate rations for sheep. / Objetivou-se, com este estudo, avaliar os efeitos da inclus?o do res?duo de panifica??o (RP) na dieta de ovinos, sobre o consumo, a digestibilidade aparente, o balan?o de compostos nitrogenados e os par?metros ruminais, e determinar as fra??es de carboidratos e nitrogenadas dos alimentos e das dietas. Foram estudados cinco n?veis de substitui??o do milho pelo RP (0; 25; 50; 75 e 100%), utilizando-se cinco cordeiros machos, com peso m?dio de 30 kg, distribu?dos segundo um delineamento em Quadrado Latino 5 x 5. As dietas experimentais foram compostas de concentrado e feno de capim-Tifton 85 (Cynodon spp), numa rela??o volumoso:concentrado de 60:40. Para a determina??o do consumo e digestibilidade aparente foram coletadas amostras dos alimentos, sobras e das fezes. Foram realizadas coletas de urina por um per?odo de 24 horas para a determina??o do balan?o de compostos nitrogenados. Os resultados foram interpretados de acordo com a an?lise de vari?ncia, e regress?o, utilizando-se o teste t a 5% de signific?ncia. O RP destacou-se pelos elevados valores das fra??es de carboidratos n?o fibrosos e de prote?na de r?pida fermenta??o ruminal (A+B1), o que conferiu maior propor??o dessas fra??es nas dietas com a substitui??o de 100% do milho pelo o RP e maior sincronismo da disponibilidade de energia e prote?na no r?men. N?o houve efeito (P>0,05) dos n?veis de substitui??o sobre o consumo, digestibilidade dos nutrientes, balan?o de compostos nitrogenados e ganho de peso. Os diferentes n?veis de substitui??o n?o afetaram (P>0,05) o pH do l?quido ruminal e as concentra??es dos ?cidos graxos vol?teis, por?m para a concentra??o de nitrog?nio amoniacal (N-NH3) foi observada redu??o linear (P<0,05) em fun??o dos n?veis de substitui??o, em que cada 1% de RP promoveu redu??o de 0,11 mg/dL na concentra??o de N-NH3, o que pode estar relacionada ao aumento na disponibilidade de energia no r?men, que possibilita maior utiliza??o da am?nia para o crescimento microbiano. A adi??o de RP causou redu??o de at? 51,15% no custo da ra??o concentrada. Concluindo-se que o RP pode substituir totalmente o milho nas ra??es concentradas de ovinos.

<p>Ba&scaron;tenska jagoda (Fragaria x ananassa Duch.), poznata po svom delikatnom mirisu, ukusu i bogastvu u vitaminima i mineralima, gaji se u svim regionima sveta. Jagode, kao voće sa visokom proizvodnom i upotrebnom vredno&scaron;ću, zahtevaju visoka ulaganja rada i metrijala po jedinici povr&scaron;ine. Imajući ovo u vidu, jagoda zahteva posebnu pažnju u svim etapama proizvodnje (gajenja) tj. od zasnivanja jagodnjaka do berbe i prodaje. Cilj ovog istraživanja je, utvrđivanje investicione vrednosti zasnivanja i ostvarenih ekonomskih efekata koji se postižu u proizvodnji jagode karatkog i neutralnog dana u uslovima jugo-zapadnog Ontarija u Kanadi. Najveća proizvodnja u svetu se ostvaruje u severnoj hemisferi (90,5%). Vodeće zemlje po proizvodnji jagode su: SAD, &Scaron;panija, Japan i Republika Koreja. Ove četiri zemlje čine 47,2% od ukupne svetske proizvodnje. Najveće povećanje kapaciteta jagode postignuto je u južnoj hemisferi. Za prikupljanje podataka o tehnologiji gajenja i investicionoj vrednosti ulaganja u proizvodnji jagode, kori&scaron;ćena je metoda anketiranja. U anketi je učestvovalo 19. proizvođača jagoda kratkog i 9. neutralnog dana u toku 2011. i 2012. godine. Upitnikom su prikupljeni podaci o tehnologije gajenja jagode po radnim operacijama, upotrebi materijala, ma&scaron;ina i radne snageTakođe, evidentirane su i strane usluge, ostvareni prosečni prinosi, prodajni kanali i procenat uče&scaron;ća u ukupnoj prodaji i postignuta prosečna cena.</p><p>Na osnovu prikupljenih podataka izračunati su tro&scaron;kovi zasnivanja jagodnjaka, redovne nege i brbe u prvoj i drugoj godini i ostvareni profit za obe grupe jagode. Jagode kratkog dana se isključivo gaje u redovima na otvorenom, a jagode neutralnog dana na bankovima obloženim belom polietilenskom folijom i instaliranim kap-po-kap sistemom za navodnjavanje. Najveći procenat (70%) jagode kratkog dana se prodaje direktno kupcima na gazdinstvu ili lokalnim pijacama, a 55% jagode neutralnog dana se prodaje kanalima veleprodaje. U proseku, proizvođači jagode kratkog dana su postigli profit $CAD 22.300/ha (29,10% od ukupnog prihoda), a proizvođači jagode neutralnog dana $CAD 37.962/ha (29,50% od ukupnog prihoda). Znači, proizvodnja obe grupe jagoda je veoma profitabilna, i postoji realna osnova za dalje povećanje profita.</p> / <p>The cultivated strawberries (Fragaria x ananassa Duch.), known for its delicate fragrance, flavour, and rich vitamin and mineral content, can be grown in most arable regions of the globe. Strawberry production, like many high-value crops, is resource and labour-intensive. Therefore, attention to detail is required at all stages of strawberry production, from establishment to harvest and marketing. The objective of this study was to determn the cost of strawberry establishment and achived economic effects of short-day and day-neutral strawberry production in south-western Ontario, Canada. The most of the production is located in the northern hemisphere (90.5%). The leading strawberry producing nations are USA, Spain, Japan and Republic of Korea. These four countries counted for 47.2% of all world&rsquo;s strawberry production. The largest increase in strawberry production capacity was recorded in the southern hemisphere. For data collection on procedure for growing a crop of strawberries and investment in strawberry production a survey technique was used. In survey participated 19 short-day and 9 day-neutral strawberry growers and was conducted in 2011 and 2012. The survey recorded strawberry production procedures, materials, equipment and labour use. Also, growers reported external<br />Mr Dragan M. Galić - Doktorska disertacija<br />vii<br />services used, achieved yields, marketing channels of sale, percent of each channel and achieved average sale prices. Based on collected information the cost of establishment, regular care, harvest in first and second year and total income were calculated for both groups of strawberries. Short-day strawberries are grown on matted-rows, while day-neutral on raised beds on white plastic with trickle irrigation installed. Most (70%) of the short-day crop was sold via direct sale (&ldquo;U-pick&rdquo;, ready-picked and farmers&rsquo; market), while 55% of day-neutral strawberries were sold in wholesale. On average, growers of short-day strawberries generated a profit of 22,300 $CAD/ha (29.10% of total income), and growers of day-neutral strawberries 37,962 $CAD/ha (29.50% of total income). Based on this study, both groups of strawberries in Ontario are highly profitable and with great potential for frofit increase.</p>

This thesis introduces a design optimization methodology that is based on minimizing the Cost of Energy (COE) of a Horizontal Axis Wind Turbine (HAWT) that is to be operated at a specific wind site. In the design methodology for the calculation of the Cost of Energy, the Annual Energy Production (AEP) model to calculate the total energy generated by a unit wind turbine throughout a year and the total cost of that turbine are used. The AEP is calculated using the Blade Element Momentum (BEM) theory for wind turbine power and the Weibull distribution for the wind speed characteristics of selected wind sites. For the blade profile sections, either the S809 airfoil profile for all spanwise locations is used or NREL S-series airfoil families, which have different airfoil profiles for different spanwise sections, are used,. Lift and drag coefficients of these airfoils are obtained by performing computational fluid dynamics analyses. In sample design optimization studies, three different wind sites that have different wind speed characteristics are selected. Three scenarios are generated to present the effect of the airfoil shape as well as the turbine power. For each scenario, design optimizations of the reference wind turbines for the selected wind sites are performed the Cost of Energy and Annual Energy Production values are compared.

No description available.

Il benessere degli animali è uno dei temi più discussi temi delle scienze animali. Molti ricercatori hanno provato a darne una definizione e a sviluppare strumenti utili alla sua valutazione negli allevamenti di vacche da latte. Nel presente lavoro viene discussa la possibilità di valutare il benessere degli animali, attraverso sistemi di innovazione da diversi punti di vista: scientifico, economico e zootecnico. Quattro differenti ricerche sono state sviluppate per confrontare i risultati sulla valutazione del benessere degli animali negli allevamenti da latte ottenuti con: indici fisiologici, modello SDIB e un sistema di monitoraggio della ruminazione. / Animal welfare is one of the most discussed topic in the animal science. Many researchers have been proving to define animal welfare and to develop tools useful to assess its levels in dairy farms. In the present issue it is discussed with different point of view (scientific, economical and zootechnic) the opportunity to assess the animal welfare through innovations system. Our different research was develop to compare the results about animal welfare in dairy herds obtained by physiological indices as well as blood variables, a model for animal welfare assessment as well as IDSW model, a rumination monitoring system.

Hydrogen can be produced from biomass; this hydrogen is called biohydrogen. Biohydrogen produced in Western Canada can partially contribute to meeting the demand for hydrogen needed for bitumen upgrading. Gasification and pyrolysis are two promising pathways for producing biohydrogen in a large-scale plant. Syngas, produced from the gasification of biomass, and bio-oil, produced from fast pyrolysis of biomass, can be steam reformed to produce biohydrogen. The cost of biohydrogen delivered by pipeline to a distance of 500 km is $2.20 per kg of H2, assuming that a plant utilizes 2000 dry tonnes of whole-tree biomass per day processing it in a Battelle Columbus Laboratory (BCL) gasifier. For forest residue- and straw-based biohydrogen plants the values are similar: $2.19 and $2.31 per kg of H2, respectively. Maximum economy of scale benefits are realized for biohydrogen production plants capable of processing 2000 and 3000 dry tonnes per day using BCL and GTI (Gas Technology Institute) gasification technology, respectively. The cost of biohydrogen from fast pyrolysis ($2.47 per kg of H2 from a 2000 dry tonne per day plant), using forest residue as the feedstock, is higher than the cost of biohydrogen produced by gasification. Carbon credits of about $120-$140 per tonne of CO2 are required to make biohydrogen competitive with natural-gas-based hydrogen.

Resumo: O experimento foi conduzido no intuito de avaliar ovelhas de descarte abatidas em diferentes estágios fisiológicos e terminadas em confinamento, quanto aos rendimentos de carcaça e seus cortes, assim como dos percentuais de cada não componente da carcaça e o resultado econômico da preparação destes animais para abate. Utilizou-se 21 ovelhas da raça Santa Inês, com idade média de seis anos, que foram distribuídas nos respectivos tratamentos: OL = ovelhas que permaneceram por 60 dias em lactação com seus respectivos cordeiros e abatidas um dia após o desmame dos mesmos; OSC = ovelhas que permaneceram por 60 dias em lactação com seus respectivos cordeiros e mais um período aproximado de 30 dias sem os cordeiros, no intuito de recuperar o peso corporal perdido durante o período de amamentação e posteriormente abatidas; e ONP = ovelhas que permaneceram por 60 dias em confinamento e que não pariram durante o ano. Os resultados obtidos nesta pesquisa evidenciaram que as ovelhas do ONP apresentaram maiores rendimentos de carcaça quente (45,00%) e fria (44,73%) em comparação às fêmeas do OL (40,80% e 40,66%). O rendimento verdadeiro foi próximo entre as fêmeas dos diferentes tratamentos, com valor médio de 50,10%. Os rendimentos dos cortes da carcaça (paleta, pescoço, costelas, lombo e perna) foram similares entre todas as ovelhas abatidas nas distintas condições fisiológicas, com valores médios de 18,78%, 9,34%, 27,36%, 7,77%, e 34,70%, respectivamente. Os rendimentos dos não componentes da carcaça foram similares entre as ovelhas abatidas em diferentes estágios fisiológicos, com exceção dos valores do fígado, do sangue, do úbere e da gordura interna. O resultado econômico foi positivo para todos os tratamentos experimentais, no entanto o melhor retorno financeiro foi obtido para os animais do tratamento OSC e o pior para os do tratamento ONP. / Abstract: The experiment was carried out aiming to evaluate discard ewes slaughtered in different physiological stages and terminated in confinement, as for carcass yields and its cuts, as well as the percentages of each non-component of the carcass and the economical result of the preparation of these animals for slaughtering. 21 Santa Inês ewes were used, with average age of six years old, distributed into the following treatments: EL = ewes which remained in lactation for 60 days with their respective lambs and slaughtered one day after weaning of the lambs; EWL = ewes that remained in lactation for 60 days with their respective lambs and other 30 days approximately without lambs, aiming to recover lost body weight during breastfeeding, and, subsequently, slaughtered; and ENC = ewes that remained in confinement for 60 days and did not deliver during the year. The results obtained in this research showed that ewes from ENC presented higher hot (45.00%) and cold (44.73%) carcass yields, compared to females from EL (40.80% and 40.66%). True yield was proximate between females from the different treatments, with average value of 50.10%. Carcass cuts (shoulderblade, neck, ribs, loin and leg) yields were similar among all ewes slaughtered in the distinct physiological conditions, with average values of 18.78%, 9.34%, 27.36%, 7.77% and 34,70%, respectively. Carcass non-components yields were similar among ewes slaughtered in different physiological stages, except for liver, blood, udder values and internal fat. The economical result was positive for all experimental treatments; however, the best financial return was obtained for animals from treatment EWL and the worst for animals from treatment ENC. / Orientador: André Mendes Jorge / Coorientador: Hirasilva Borba Alves de Souza / Banca: Francisco de Assis Fonseca de Macedo / Banca: Nivea Maria Bracacci Lopes Zeola / Banca: Cledson Augusto Garcia / Banca: Ciniro Costa / Doutor

Submitted by Katiane Souza (katyane.souza@gmail.com) on 2016-03-24T01:49:16Z No. of bitstreams: 1 arquivototal.pdf: 1613160 bytes, checksum: 6023591b1bbf7cc57693c17cae8e2a23 (MD5) / Made available in DSpace on 2016-03-24T01:49:16Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1613160 bytes, checksum: 6023591b1bbf7cc57693c17cae8e2a23 (MD5) Previous issue date: 2014-07-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The effects of different offers roughage, concentrate and water performance, economic viability, characteristics and carcass yield of sheep were evaluated. We used 40 crossbred sheep de Santa Inês, uncastrated, with an average initial weight of 18.85 ± 2.80 kg and mean age 5.0 ± 2.0 months, distributed in a completely randomized design, on a 2x2 factorial design, consisting of two forage to concentrate ratios: 30:70 and 70:30 with their energy levels: 2.67 and 2.10 Mcal of ME/kg DM and two offerings of water (water ad libitum and restricted by 50%) with 10 replicates during 73 days. To evaluate the characteristics and performance of the carcasses, the animals were slaughtered at an average weight of 27.62 ± 3.06 kg. Proximate composition (% moisture, % ash, % protein and % ether extract) of Longissimus dorsi was determined, and the same was considered the color parameters (L *, a * and b *), shear force, cooking loss and pH. The water restriction caused effect (P<0.05) on dry matter and nutrients, and total daily gain weight regardless of roughage and concentrate. There was no effect (P>0.05) of water restriction on feed conversion and efficiency. The total weight gain, average daily gain, feed conversion and efficiency were influenced by the proportions of forage and concentrate. The evaluation of economic results revealed that all combinations of water supply and levels of dietary energy to produce crossbred sheep de Santa Inês were positive for gross income and profit. Higher total cost of the diet was obtained when the animals were fed with high level of concentrate. There was no effect (P<0.05) of water restriction on the chemical composition, in variations of color (L *, a * and b *), weight and cut yields, and the evaluation parameters for carcass yield, except to the final weight. Weights and carcass were influenced (P<0.05) the proportion of forage and concentrate, no differences in cooling losses and biological yield. There was effect (P<0.05) of restriction of water in cooking loss. It was concluded that, when associated higher proportion of roughage in the diet with water restriction animal performance is reduced and the combination of diet and fluid restriction and concentrate more than 50% of consumption allows higher net income and improved benefit cost ratio. Higher weights and yields of hot and cold carcass are obtained in animals fed diets with a higher share of the concentrate. / Foram avaliados os efeitos de diferentes ofertas de volumoso, concentrado e água no desempenho, viabilidade econômica, características e rendimento de carcaça de ovinos. Utilizaram-se 40 ovinos mestiços de Santa Inês, não castrados, com peso médio de 18,0±2,5 kg e idade média de 5,0±2,0 meses, distribuídos em um delineamento inteiramente casualizado, em um esquema fatorial de 2x2, composto por duas proporções volumoso e concentrado: 30:70 e 70:30 com os respectivos níveis de energia metabolizável: 2,67 e 2,10 Mcal/kg de matéria seca, e duas ofertas de água (100 e 50%) com 10 repetições, durante 73 dias. Para avaliação das características e rendimento das carcaças, os animais foram abatidos com peso médio de 27,62±3,06 kg. Foi determinada a composição centesimal (% umidade, % matéria mineral, % proteína e % extrato etéreo) do músculo Longissimus dorsi, e do mesmo foi analisado os parâmetros de cor (L*, a* e b*), força de cisalhamento, perdas de peso por cocção e pH. A restrição de água causou efeito (P<0,05) no consumo de matéria seca e nutrientes, ganho de peso total e diário, independentemente das proporções de volumoso e concentrado. Não se verificou efeito (P>0,05) da restrição de água na conversão e eficiência alimentar. O ganho de peso total, ganho médio diário, conversão e eficiência alimentar foram influenciadas pelas proporções de volumoso e concentrado. A avaliação do resultado econômico revelou que todas as combinações de oferta de água e níveis de concentrado e volumoso da dieta para a produção de ovinos mestiços de Santa Inês apresentaram resultados positivos para a renda bruta e lucro. Maior custo total da dieta foi obtido quando os animais foram alimentados com maior nível de concentrado. Não se verificou efeito (P>0,05) da restrição de água na composição centesimal, nas variações de cor (L*, a* e b*), peso e rendimento dos cortes, e nos parâmetros de avaliação de rendimento de carcaça, exceto para o peso final. Os pesos e rendimentos de carcaça foram influenciados (P<0,05) pela proporção de volumoso e concentrado, não havendo diferenças nas perdas por resfriamento e rendimento biológico. Verificou-se efeito (P<0,05) da restrição de água na perda de peso por cocção. Concluiu-se que, quando se associa maior proporção de volumoso na dieta com restrição hídrica o desempenho animal é reduzido. A restrição de água em 50% do consumo ad libitum permite melhor relação custo benefício, e não afeta o peso e rendimento das carcaças de ovinos mestiços de Santa Inês. Maiores pesos e rendimentos de carcaça quente e fria são obtidos em animais alimentados com dietas com maior participação do concentrado.