Estratégias de suplementação energética para bovinos em recria em pastagens tropicais durante as águas e seus efeitos na terminação em confinamento

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (691 download)

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Book Synopsis Estratégias de suplementação energética para bovinos em recria em pastagens tropicais durante as águas e seus efeitos na terminação em confinamento by :

Download or read book Estratégias de suplementação energética para bovinos em recria em pastagens tropicais durante as águas e seus efeitos na terminação em confinamento written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Os objetivos deste estudo foram avaliar estratégias de suplementação energética para bovinos em recria, mantidos em pastagens tropicais bem manejadas durante as águas, quanto ao desempenho animal, capacidade de suporte das pastagens, ganho de peso por área e desempenho dos animais durante a terminação em confinamento. Os tratamentos testados foram: T1) Controle: somente mistura mineral; T2) Constante: fornecimento contínuo do concentrado na dose de 0,6% do PC; T3) Crescente: fornecimento de 0,3% do PC em concentrado no primeiro terço, 0,6% do PC no segundo terço e de 0,9% do PC no terceiro terço do período de recria dos animais. Foram utilizados 76 garrotes de corte, com peso inicial de 208 kg e 8 meses de idade. Os animais foram alocados em 8,5 ha de pastagem de capim Brachiaria brizantha cv. Marandu, manejados em sistema rotacionado com intervalo de desfolha variável. Foram avaliadas a massa de forragem (MF) pré e pós pastejo (kg MS ha-1), a composição morfológica (% de folhas, colmos e material morto) e valor nutritivo da forragem, o ganho de peso individual (kg cab-1 dia-1), a taxa de lotação (cab ha-1) e o ganho de peso por área (kg ha-1) durante a fase de recria dos animais. Na fase de confinamento dos animais foram avaliados o ganho de peso diário individual (GPD em kg cab-1), o consumo de matéria seca (kg dia-1) e a eficiência alimentar dos animais (kg de ganho diário kg de alimento consumido-1). Os animais suplementados apresentaram GPD superiores aos animais não suplementados (0,535, 0,787 e 0,867 kg cab-1 dia-1, respectivamente para os tratamentos controle, constante e crescente). Além disso, os animais do tratamento crescente apresentaram desempenho superior àquele dos animais do tratamento constante, mesmo consumindo quantidades semelhantes de suplemento. A suplementação foi, ainda, eficiente em aumentar a taxa de lotação dos pastos que foi, em média, de 5,94, 7,13 e 6,90 UA ha-1, respectivamente para os tratamentos controle, constante e crescente. Duran.

Estratégias de suplementação de bovinos de corte em pastagens durante o período das águas

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (691 download)

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Download or read book Estratégias de suplementação de bovinos de corte em pastagens durante o período das águas written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: No presente estudo foram conduzidos dois experimentos, com o objetivo de avaliar doses e fontes de suplementos múltiplos para bovinos de corte recriados em pastagens durante o período das águas. Adicionalmente, estudou-se o impacto dessa tecnologia sobre a terminação desses animais em confinamento, bem como a rentabilidade dos tratamentos. No experimento 1, foi testado o efeito de 4 doses diárias de suplementos em função do peso vivo (PV) dos animais: T0 (0% do PV), T0,3 (0,3% do PV), T0,6 (0,6% do PV) e T0,9 (0,9% do PV). O suplemento utilizado continha 20% de proteína bruta na matéria natural. Foram utilizados 72 bovinos machos inteiros, cruzados, com aproximadamente 222 kg de PV inicial, distribuídos em blocos casualizados (2 blocos, 4 tratamentos e 4 períodos). Foi observado aumento linear (P

Suplementação protéica ou energética para bovinos recriados em pastagens tropicais

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (181 download)

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Book Synopsis Suplementação protéica ou energética para bovinos recriados em pastagens tropicais by :

Download or read book Suplementação protéica ou energética para bovinos recriados em pastagens tropicais written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: O objetivo do trabalho foi comparar o desempenho de bezerros, não castrados, recriados no período das águas, exclusivamente em pastagens (CONT) ou suplementados com concentrado energético (ENER) ou protéico (PROT). Também foi avaliado o efeito da suplementação, no desempenho posterior destes animais na fase de terminação em confinamento. Foram utilizados 75 bezerros recém desmamados, com 8 meses de idade e 200,08 kg de PV, provenientes do cruzamento de touro Pardo Suíço com vaca F1 Angus x Nelore. Os animais foram mantidos em 22 ha de pastagem de capim Colonião (Panicum maximum), de dezembro de 2004 a maio de 2005. A pastagem foi dividida em 8 piquetes e manejada em sistema rotacionado, com período de descanso variável e adubada com 45 kg de N por pastejo. Os animais pastejavam em lote único e eram separados diariamente em 3 lotes conforme o tratamento experimental para receberem os respectivos suplementos. Os animais do tratamento controle (CONT) eram conduzidos de volta ao pasto logo após a separação. Todos os animais tinham mistura mineral a disposição nos pastos. Os animais dos tratamentos ENER e PROT, recebiam diariamente 0,6% do PV (em matéria natural) dos respectivos suplementos. O suplemento ENER (6,4% de PB na MS) continha polpa cítrica e mistura mineral com monensina sódica. O suplemento PROT (19% de PB na MS), continha polpa cítrica, farelo de algodão e mistura mineral com monensina sódica. O ganho de peso diário (GPD) foi maior (P0,05) para os animais suplementados, sendo de 0,741; 0,908 e 0,967 kg.animal-1 para os tratamentos CONT, ENER e PROT respectivamente. Não houve diferença de GPD quanto ao tipo de suplemento (P0,05). Após 158 dias da fase de recria em pasto, os animais foram terminados em confinamento por 127 dias. Todos os animais receberam a mesma ração, com 82% de concentrado e 18% de silagem de milho. Os GPD foram de 1,38, 1,51 e 1,45 kg/cab para os tratamentos CONT, ENER e PROT respectivamente. O GPD do tratamento ENER foi maior (P

A Hora É Agora

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Publisher : Independently Published
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.8/5 (67 download)

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Book Synopsis A Hora É Agora by : Guilherme Mascarenhas Miranda

Download or read book A Hora É Agora written by Guilherme Mascarenhas Miranda and published by Independently Published. This book was released on 2023-09-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A presente publicação visa contribuir positivamente para os estudos na área das agrárias e oferece ao leitor alternativas de suplementação proteica e suplementação proteico-energética na fase de recria e terminação de bovinos em sistema a pasto. As pastagens representam a principal e mais barata fonte de alimentos para os ruminantes. No entanto, aspastagens tropicais apresentam sazonalidade da produção e variação no valor nutritivo ao longo do ano. A composição bromatológica da planta e o consumo forrageiro feito pelo animal são fatores que influenciam o desempenho dos animais criados a pasto. Na época das águas as pastagens apresentam uma alta produtividade e valor nutritivo adequado, portanto, favorece aos animais maiores ganhos e melhor desempenho em comparação a época da seca. Na época de seca é o período mais desafiador para o produtor que trabalha com animais de recria e terminação, pois neste período as pastagens apresentam baixa produtividade e forragem com baixo valor nutritivo. A suplementação proteica-energética tem demonstrado ser uma boa estratégia para bovinos a pasto na fase de terminação, por melhorar o aporte da pastagem, promover o um maior desempenho dos animais e o abate de animais jovens. A suplementação proteica tem demonstrado ser viável na fase de recria por promover ganho mais acelerado e redução do ciclo de produção. No entanto, é importante levar em consideração a viabilidade do suplemento, juntamente com a quantidade de massa de forragem por área e a época do ano a ser suplementado, o preço da venda do animal e as metas que o produtor deseja alcançar. Após a análise bibliográfica do tema identificou-se a importância da suplementação proteica e suplementação proteica-energética na fase de recria e terminação de bovinos em sistema a pasto. A suplementação surge como aliada para maximizar a produção animal individual e aumentar a produção por área. Quando feita de forma correta, suprindo exigências básicas dos animais, os resultados serão satisfatórios. Portanto, o objetivo desta publicação é aprofundar os conhecimentos sobre a suplementação proteica e proteico-energética de bovinos de corte em sistema de produção a pasto, de modo que essas informações sejam passadas para o produtor e aplicadas na fazenda. Por serem informações concretizadas, baseadas em publicações científicas, trás dados importantes sobre o assunto que pode favorecer o aumento da produtividade e a redução do ciclo de produção de bovinos criados a pasto.

Suplementos múltiplos para recria e terminação de novilhos mestiços, em pastejo, durante os períodos de transição águas-seca e seca

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ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Suplementos múltiplos para recria e terminação de novilhos mestiços, em pastejo, durante os períodos de transição águas-seca e seca by : M. F. L. Sales

Download or read book Suplementos múltiplos para recria e terminação de novilhos mestiços, em pastejo, durante os períodos de transição águas-seca e seca written by M. F. L. Sales and published by . This book was released on 2005 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Níveis de uréia em suplementos múltiplos para terminação de novilhos em pastagem de Brachiaria brizantha, durante o período de transição águas-seca; Níveis de energia em suplementos múltiplos para terminação de novilhos em pastagem de Brachiaria brizantha no período de transição águas-seca; fontes de proteína em suplementos para recria de bovinos mestiços em pastagem de Brachiaria de cumbens durante os períodos de transição águas-seca e seca.

Principles for Building Resilience

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Publisher : Cambridge University Press
ISBN 13 : 110708265X
Total Pages : 317 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Principles for Building Resilience by : Reinette Biggs

Download or read book Principles for Building Resilience written by Reinette Biggs and published by Cambridge University Press. This book was released on 2015-04-02 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting the very latest research, this book provides an in-depth review of the role of resilience in the management of social-ecological systems and the ecosystem services they provide. Leaders in the field outline seven principles for building resilience in social-ecological systems, examining how these can be applied to advance sustainability.

Australian Journal of Agricultural Research

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ISBN 13 :
Total Pages : 442 pages
Book Rating : 4.:/5 (6 download)

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Book Synopsis Australian Journal of Agricultural Research by :

Download or read book Australian Journal of Agricultural Research written by and published by . This book was released on 2000 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Southern Forages

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ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Southern Forages by : Donald M. Ball

Download or read book Southern Forages written by Donald M. Ball and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nutritional Ecology of the Ruminant

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Publisher : Cornell University Press
ISBN 13 : 1501732358
Total Pages : 490 pages
Book Rating : 4.5/5 (17 download)

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Book Synopsis Nutritional Ecology of the Ruminant by : Peter J. Van Soest

Download or read book Nutritional Ecology of the Ruminant written by Peter J. Van Soest and published by Cornell University Press. This book was released on 2018-09-05 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monumental text-reference places in clear persepctive the importance of nutritional assessments to the ecology and biology of ruminants and other nonruminant herbivorous mammals. Now extensively revised and significantly expanded, it reflects the changes and growth in ruminant nutrition and related ecology since 1982. Among the subjects Peter J. Van Soest covers are nutritional constraints, mineral nutrition, rumen fermentation, microbial ecology, utilization of fibrous carbohydrates, application of ruminant precepts to fermentive digestion in nonruminants, as well as taxonomy, evolution, nonruminant competitors, gastrointestinal anatomies, feeding behavior, and problems fo animal size. He also discusses methods of evaluation, nutritive value, physical struture and chemical composition of feeds, forages, and broses, the effects of lignification, and ecology of plant self-protection, in addition to metabolism of energy, protein, lipids, control of feed intake, mathematical models of animal function, digestive flow, and net energy. Van Soest has introduced a number of changes in this edition, including new illustrations and tables. He places nutritional studies in historical context to show not only the effectiveness of nutritional approaches but also why nutrition is of fundamental importance to issues of world conservation. He has extended precepts of ruminant nutritional ecology to such distant adaptations as the giant panda and streamlined conceptual issues in a clearer logical progression, with emphasis on mechanistic causal interrelationships. Peter J. Van Soest is Professor of Animal Nutrition in the Department of Animal Science and the Division of Nutritional Sciences at the New York State College of Agriculture and Life Sciences, Cornell University.

Biogas 2

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Publisher : Fao
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Biogas 2 by : Food and Agriculture Organization of the United Nations

Download or read book Biogas 2 written by Food and Agriculture Organization of the United Nations and published by Fao. This book was released on 1986 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initially published by arrangement with INADES, Institut africain pour le développement économique et social, Abidjan, Côte d'Ivoire, the Better Farming Series booklets are designed as handbooks for intermediate-level agricultural education and training courses. They may be purchased as a set (45 booklets) or singly.

Vegetation of the Earth and Ecological Systems of the Geo-biosphere

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Publisher : Springer Science & Business Media
ISBN 13 : 1468404687
Total Pages : 295 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Vegetation of the Earth and Ecological Systems of the Geo-biosphere by : Heinrich Walter

Download or read book Vegetation of the Earth and Ecological Systems of the Geo-biosphere written by Heinrich Walter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth's surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth's biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary production for the various regions were obtained (see table). The sum of these figures is the phytomass and annual production of the land surface of the earth. In addition, the table gives corresponding data for the waters of the earth. The values involved are potential i. e. , they are based on natural vegetation uninfluenced by man.

Calf and Heifer Rearing

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Publisher : Nottingham Trent University
ISBN 13 : 1904761224
Total Pages : 352 pages
Book Rating : 4.9/5 (47 download)

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Book Synopsis Calf and Heifer Rearing by : Philip C. Garnsworthy

Download or read book Calf and Heifer Rearing written by Philip C. Garnsworthy and published by Nottingham Trent University. This book was released on 2005-01-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume considers every aspect of calf rearing, from physiological principles to practical systems. Topics include physiology of growth and digestion, nutrient requirements, health and welfare, and lifetime performance. More than half the authors are from outside the UK and all are acknowledged as international experts in their field. This book is aimed at technical advisers, researchers, extension workers, veterinary practitioners, progressive farmers, academics and students.

Climate Dynamics of the Tropics

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Publisher : Springer Science & Business Media
ISBN 13 : 9401131562
Total Pages : 507 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Climate Dynamics of the Tropics by : S. Hastenrath

Download or read book Climate Dynamics of the Tropics written by S. Hastenrath and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of my book "Climate and Circulation of the Tropics" was reasonably up to date to the middle of 1985. In a second printing in 1988 it was possible to complete a few literature references and to correct some misprints. However, vigorous research has taken place over the past five years in various areas of tropical climate dynamics, especially in the atmosphere-ocean mechanisms of climate anomalies, climate prediction, ocean circulation, and paleoclimates. Promising progress has also been made in the application of general circulation modelling to tropical climate problems. In the present second edition, named "Climate Dynamics of the Tropics", I have attempted to incorporate much of the recent work to late 1990. Chapters 8 and 9 have been essentially re-written, and major additions have been made to Chapters 4 and 12 in particular. I would like to acknowledge the continued support by the U.S. National Science Foundation over the past five years. B. Parthasarathy, Poona, and H. Lessmann, San Salvador, sent me updates of data series not easily accessible. I have benefitted from discussions with numerous colleagues in the United States and overseas. In the preparation of this second edition, Marilyn Wolff patiently transferred my illegible hand-written drafts onto word processor. Dierk Polzin and Dan Skemp assisted me with the creation of the page masters and the subject index and Christopher Collimore with the author index.

Southern Forages

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Publisher :
ISBN 13 : 9780962959868
Total Pages : 322 pages
Book Rating : 4.9/5 (598 download)

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Book Synopsis Southern Forages by : Donald M. Ball

Download or read book Southern Forages written by Donald M. Ball and published by . This book was released on 2007-01 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Southern Forages has since gained wide recognition as a practical and reliable source of information on modern forage crop management. It is used by livestock producers, by seed, equipment and fertilizer dealers, by extension and conservation workers, and by teachers as a text for students learning about forages.

Fire and Plants

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Publisher : Springer Science & Business Media
ISBN 13 : 9400914997
Total Pages : 275 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Fire and Plants by : William J. Bond

Download or read book Fire and Plants written by William J. Bond and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large regions of the world are regularly burnt either deliberately or naturally. However, despite the widespread occurrence of such fire-prone ecosystems, and considerable body of research on plant population biology in relation to fire, until now there have only been limited attempts at a coherent conceptual synthesis of the field for use by students or researchers.

The Cerrados of Brazil

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Publisher : Columbia University Press
ISBN 13 : 0231505965
Total Pages : 409 pages
Book Rating : 4.2/5 (315 download)

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Book Synopsis The Cerrados of Brazil by : Paulo S.

Download or read book The Cerrados of Brazil written by Paulo S. and published by Columbia University Press. This book was released on 2013-02-05 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The massive grasslands of Brazil -- known as the cerrados -- which cover roughly a quarter of its land surface and are among the most threatened regions in South America, have received little media attention. This book brings together leading researchers on the area to produce the first detailed account in English of the natural history and ecology of the cerrado/savanna ecosystem. Given their extent and threatened status, the richness of their flora and fauna, and the lack of familiarity with their unique ecology at the international level, the cerrados are badly in need of this important and timely work.

Vegetation history

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Publisher : Springer Science & Business Media
ISBN 13 : 940093081X
Total Pages : 808 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Vegetation history by : B. Huntley

Download or read book Vegetation history written by B. Huntley and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of vegetation history is one of the prime objectives for vegetation scientists. In order to understand the recent composition of local floras and plant communities a second knowledge of species com position during recent millenia is essential. With the present concern over climate changes, due to human activities, an understanding of past vegeta tion distribution becomes even more important, since the correlation between climate and vegetation can often be used to predict possible impacts to crops and forests. I was very fortunate to receive the help of Drs. Webb and Huntley to compile this volume on vegetation history. They have collated an impres sive set of papers which together give an account of the vegetation history of most of the continents during the late-Tertiary and Quaternery periods. There are, however, gaps in the coverage achieved, most notably Africa, and Asia apart from Japan. The information in this book will nonetheless certainly be used widely by vegetation scientists for the regions covered in the book and much of it has relevance to the areas not explicitly described. The authors of the individual chapters have done their best to cover recent topics of interest as well as established facts. It is intended that a separate volume will be produced in the near future covering the vegetation history of Africa and Asia. I thank the editors of It fits well into the this volume for their commendable achievement.