Adubacao Nitrogenada Para Pastagens Do Genero Brachiaria Em Solos Do Cerrado

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Adubação nitrogenada para pastagens do gênero Brachiaria em solos do Cerrado

Author : K. A. de P. COSTA
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Adubação nitrogenada para pastagens do gênero Brachiaria em solos do Cerrado by : K. A. de P. COSTA

Download or read book Adubação nitrogenada para pastagens do gênero Brachiaria em solos do Cerrado written by K. A. de P. COSTA and published by . This book was released on 2006 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introdução; Gênero Brachiaria; Matéria orgânica do solo e sua relação com a disponibilidade de N; Adições de nitrogênio ao sistema solo-pastagem; Importância da adubação nitrogenada em pastagens; Concentrações de nitrogênio e estimativa do teor de clorofila; Dinâmica do nitrogênio em pastagens; Perdas de nitrogênio do sistema solo-pastagem; Eficiência e recuperação do nitrogênio; Eficiência do nitrogênio na produção animal; Recomendação de adubação nitrogenada; Recomendação de adubação nitrogenada para o gênero Brachiaria de acordo com a fertilidade do solo; Recomendação de adubação nitrogenada para o gênero Brachiaria de acordo com o sistema de pastejo; Formas de aplicação de nitrogênio para pastagens; Considerações finais.

Biodiversity in Ecosystems

Author : Juan A. Blanco
Publisher : BoD – Books on Demand
ISBN 13 : 953512028X
Total Pages : 644 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Biodiversity in Ecosystems by : Juan A. Blanco

Download or read book Biodiversity in Ecosystems written by Juan A. Blanco and published by BoD – Books on Demand. This book was released on 2015-04-17 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term biodiversity has become a mainstream concept that can be found in any newspaper at any given time. Concerns on biodiversity protection are usually linked to species protection and extinction risks for iconic species, such as whales, pandas and so on. However, conserving biodiversity has much deeper implications than preserving a few (although important) species. Biodiversity in ecosystems is tightly linked to ecosystem functions such as biomass production, organic matter decomposition, ecosystem resilience, and others. Many of these ecological processes are also directly implied in services that the humankind obtains from ecosystems. The first part of this book will introduce different concepts and theories important to understand the links between ecosystem function and ecosystem biodiversity. The second part of the book provides a wide range of different studies showcasing the evidence and practical implications of such relationships.

Uso de gesso, calcário e adubos para pastagens no cerrado

Author : Djalma M. Gomes de Sousa
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (236 download)

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Book Synopsis Uso de gesso, calcário e adubos para pastagens no cerrado by : Djalma M. Gomes de Sousa

Download or read book Uso de gesso, calcário e adubos para pastagens no cerrado written by Djalma M. Gomes de Sousa and published by . This book was released on 2001 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A pecuária no Cerrado baseou-se, por muitos anos, na exploração de pastagens nativas. Nas três últimas décadas, o crescimento acentuado do rebanho bovino na região e o incremento de até cinco vezes na capacidade de suporte das pastagens deveu-se ao aumento da área com grandes gramíneas forrageiras, provenientes do continente africano, especialmente as do genero Brachiaria e o Andropogon gayanus cv. Planaltina. Estabelecidas sem adubação ou com o efeito residual de modestas adubações da cultura do arroz, sem adubação de manutenção e submetidas a manejo inadequado, extensas áreas dessas pastagens encontram-se em variados graus de degradação. A ausência de adubação de reposição durante décadas de extração dos nutrientes tornou necessária a recuperação dessas pastagens com correção e adubação adequadas ao sistema de produção de cada propriedade. Para isso, em muitos casos, são necessárias aplicações de calcário, gesso, macronutrientes (nitrogênio, fósforo, potássio) e micronutrientes (zinco, cobre, boro, molibdênio, manganês). Nesta publicação, são relatadas respostas de pastagens ao gesso, bem como critérios usados no diagnóstico da sua necessidade e na determinação da dose desse insumo a ser aplicada no solo. São apresentadas ainda recomendações resumidas para correção com calcário e adubos.

Adubação fosfatada para manutenção de pastagem de Brachiaria decumbens no Cerrado

Author : W. V. Soares
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Adubação fosfatada para manutenção de pastagem de Brachiaria decumbens no Cerrado by : W. V. Soares

Download or read book Adubação fosfatada para manutenção de pastagem de Brachiaria decumbens no Cerrado written by W. V. Soares and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Calagem superficial em pastagens de Brachiaria decumbens cv. Basilisk sob adubação nitrogenada intensa

Author : Odo Primavesi Primavesi
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (71 download)

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Book Synopsis Calagem superficial em pastagens de Brachiaria decumbens cv. Basilisk sob adubação nitrogenada intensa by : Odo Primavesi Primavesi

Download or read book Calagem superficial em pastagens de Brachiaria decumbens cv. Basilisk sob adubação nitrogenada intensa written by Odo Primavesi Primavesi and published by . This book was released on 2008 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A adubação nitrogenada é ferramenta-chave para aumentar a produção de forragem. Em experimento anterior de recuperação de pastagem degradada de Brachiaria decumbens, estabelecida a 25 anos, em São Carlos, SP, em que se utilizaram corretivos e fertilizantes (especialmente nitrogênio e potássio) aplicados na superfície do solo, verificou-se acidificação acentuada no final do período de quatro anos. No tratamento sem calcário houve recuperação do capim-braquiária com a aplicação de N, mas ao final de cinco anos iniciou o aparecimento de sinais de mortalidade de plantas. O objetivo deste projeto foi estimar a quantidade mínima de calcário e de nitrogênio a ser utilizada para alcançar elevada produtividade de forragem, com o mínimo de impactos ambientais negativos nas características químicas de um Latossolo Vermelho-Amarelo distrófico, com 300 g/kg de argila. O delineamento experimental foi o de blocos casualizados em arranjo fatorial de 3 x [(2 x 2) + 1 testemunha], utilizando nitrato de amônio e sulfato de amônio nas doses de 50 e de 100 kg/ha por corte e duas doses de calcário (3 e 6 t/ha) mais uma testemunha geral. As doses de N e de calcário foram aplicadas em faixas aleatórias, com três repetições, totalizando 45 parcelas experimentais de 3 x 7 m, com 6 m2 de área útil cada. Verificou-se que a produção de fitomassa de apim-braquiária em pastagem degradada foi aumentada inicialmente com doses de N em torno de 130 kg/ha por aplicação. O número de cortes e de aplicações de N foi de cinco por ano no período das chuvas. Essa quantidade aplicada pode ser reduzida ao longo dos anos numa taxa de 10% a 15% ao ano até o ponto de equilíbrio entre entrada, imobilização, mineralização, perdas e retirada de N. Este ponto de equilíbrio, que ainda necessita ser determinado, parece ocorrer após o sétimo ano. A calagem adequada foi aquela que inicialmente corrigiu a saturação por bases até o nível adequado para a produção da forrageira, seguida de aplicações anuais para corrigir a acidez ?fisiológica? das doses de nitrogênio utilizadas. Para evitar lixiviação de cálcio, de magnésio, de potássio e de nitrato as doses aplicadas de insumos devem ser calibradas para a capacidade de extração da forrageira, relacionada com sua produtividade.

Adubacao nitrogenada no cerrado, culturas anuais e perenes

Author : A.C. de S. MEDEIROS
Publisher :
ISBN 13 :
Total Pages : 85 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Adubacao nitrogenada no cerrado, culturas anuais e perenes by : A.C. de S. MEDEIROS

Download or read book Adubacao nitrogenada no cerrado, culturas anuais e perenes written by A.C. de S. MEDEIROS and published by . This book was released on 1983 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apresenta-se nesta revisao alguns aspectos da adubacao nitrogenada no Cerrado, aplicada a culturas anuais e perenes. Em culturas anuais inclue-se o arroz, feijao, milho, soja e trigo. Em culturas perenes, pastagens, cafe, essencias floresetais e algumas frutiferas. Comenta-se sobre as cracteristicas do solo de cerrado e tambem sobre fertilizantes nitrogenados. De modo geral as culturas respondem significativamente as aplicacoes de nitrogenio, quando este elemento e aplicado isoladamente ou misturado a outros nutrientes. Nao se verifica efeitos negativos em sua utilizacao. Contudo as formulacoes sao ainda inadequadas para as condicoes de Cerrado por ser esta uma area recentemente utilizada para uma agricultura intensiva.

Resposta de pastagens de capim-marandu em solo de cerrado à adubação com nitrogênio, em condições de sequeiro. ou sob irrigação

Author : P. P. A. Oliveira
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (71 download)

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Book Synopsis Resposta de pastagens de capim-marandu em solo de cerrado à adubação com nitrogênio, em condições de sequeiro. ou sob irrigação by : P. P. A. Oliveira

Download or read book Resposta de pastagens de capim-marandu em solo de cerrado à adubação com nitrogênio, em condições de sequeiro. ou sob irrigação written by P. P. A. Oliveira and published by . This book was released on 2004 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Brachiaria

Author : John W. Miles
Publisher : CIAT
ISBN 13 : 9789589439579
Total Pages : 306 pages
Book Rating : 4.4/5 (395 download)

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Book Synopsis Brachiaria by : John W. Miles

Download or read book Brachiaria written by John W. Miles and published by CIAT. This book was released on 1996 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Identifying and naming Brachiaria species. Morphology, taxonomy, and natural distribution of Brachiaria (Trin.) Griseb. Natural variation in Brachiaria and existing germplasm collections. The agronomy and physiology of Brachiaria species. National requirementes of Brachiaria and adaptation to acid soils. Nutrient cycling and environmental impact of Brachiaria Pastures. Pests and diseases of Brachiaria species. Nutritional quality and animal production of Brachiaria pastures. Reproductive physiology, seed production, and seed quality of Brachiaria. Seed production: perspective from the Brazilian private sector. Genetic, cytogenetics, and reproductive biology of Brachiaria. Manipulation of apomixis in Brachiaria breeding. Theoretical potential of biotechniques in crop improvement. Aplication of biothecnology to Brachiaria. Regional experience with Brachiaria: Tropical America-humid lowlands. Regional experience with Brachiaria: Tropical America-savannas. Regional experience with Brachiaria: Sub-savannas Africa. Regional experience with Brachiaria: Asia, the South Pacific, and Australia. Reports of working groups.

Australian Journal of Agricultural Research

Author :
Publisher :
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

Author : Donald M. Ball
Publisher :
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:

Carbon Sequestration in Soils of Latin America

Author : Rattan Lal
Publisher : CRC Press
ISBN 13 : 1482298031
Total Pages : 584 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Carbon Sequestration in Soils of Latin America by : Rattan Lal

Download or read book Carbon Sequestration in Soils of Latin America written by Rattan Lal and published by CRC Press. This book was released on 2006-07-05 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the latest available knowledge on ways to reduce CO2 in the atmosphere! The problem of quickly mounting CO2 emissions in the fast-developing Latin American region was addressed in a symposium held in Piracicaba, Brazil, in June 2004. Carbon Sequestration in Soils of Latin America presents the latest available knowledge in soil C

The Indian Nitrogen Assessment

Author : Yash P. Abrol
Publisher : Elsevier
ISBN 13 : 0128119047
Total Pages : 570 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis The Indian Nitrogen Assessment by : Yash P. Abrol

Download or read book The Indian Nitrogen Assessment written by Yash P. Abrol and published by Elsevier. This book was released on 2017-08-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Indian Nitrogen Assessment: Sources of Reactive Nitrogen, Environmental and Climate Effects, and Management Options and Policies provides a reference for anyone interested in Reactive N, from researchers and students, to environmental managers. Although the main processes that affect the N cycle are well known, this book is focused on the causes and effects of disruption in the N cycle, specifically in India. The book helps readers gain a precise understanding of the scale of nitrogen use, misuse, and release through various agricultural, industrial, vehicular, and other activities, also including discussions on its contribution to the pollution of water and air. Drawing upon the collective work of the Indian Nitrogen Group, this reference book helps solve the challenges associated with providing reliable estimates of nitrogen transfers within different ecosystems, also presenting the next steps that should be taken in the development of balanced, cost-effective, and feasible strategies to reduce the amount of reactive nitrogen. - Identifies all significant sources of reactive nitrogen flows and their contribution to the nitrogen-cycle on a national, regional, and global level - Covers nitrogen management across sectors, including the environment, food security, energy, and health - Provides a single reference on reactive nitrogen in India to help in a number of activities, including the evaluation, analysis, synthesis, documentation, and communications on reactive nitrogen

Ecological Effects of Water-level Fluctuations in Lakes

Author : Karl M. Wantzen
Publisher : Springer Science & Business Media
ISBN 13 : 1402091923
Total Pages : 184 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Ecological Effects of Water-level Fluctuations in Lakes by : Karl M. Wantzen

Download or read book Ecological Effects of Water-level Fluctuations in Lakes written by Karl M. Wantzen and published by Springer Science & Business Media. This book was released on 2009-05-06 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments. This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.

Grassland Ecophysiology and Grazing Ecology

Author : Gilles Lemaire
Publisher : CABI
ISBN 13 : 9780851999401
Total Pages : 448 pages
Book Rating : 4.9/5 (994 download)

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Book Synopsis Grassland Ecophysiology and Grazing Ecology by : Gilles Lemaire

Download or read book Grassland Ecophysiology and Grazing Ecology written by Gilles Lemaire and published by CABI. This book was released on 2000-11-03 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents edited key papers from the International Symposium on Grassland Ecophyisiology and Grazing Ecology held in Curitiba, Brazil in August 1999. It considers how plants within grasslands respond to and are adapted to grazing animals.

Grass for Dairy Cattle

Author : Jerome Henry Cherney
Publisher : Cabi
ISBN 13 : 9780851992884
Total Pages : 0 pages
Book Rating : 4.9/5 (928 download)

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Book Synopsis Grass for Dairy Cattle by : Jerome Henry Cherney

Download or read book Grass for Dairy Cattle written by Jerome Henry Cherney and published by Cabi. This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the current interest in the environmental and economic sustainability of dairy farming, grass forage crops have emerged as a potential solution to some of the nutrient management problems now encountered on intensively managed dairy farms. The expansion and reintegration of grass-based systems into the mainstream of dairying systems will require a major paradigm shift involving economic, social and ecological, as well as biological factors. This book examines the role of grass in milk production in sustainable agricultural ecosystems. It provides a current summary of the role of grass in dairy cattle systems, including the breeding, management, storage, feeding and economics of grass for both lactating and dry dairy cows. Written by leading specialists from Australia, Europe, New Zealand, North and South America, this is an essential reference source for researchers, dairy industry professionals and advanced students of forage and dairy cattle nutrition.

Soil Management for Sustainability

Author : R. Lal
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Soil Management for Sustainability by : R. Lal

Download or read book Soil Management for Sustainability written by R. Lal and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book manuscripts presented originally at a World Association of Soil and Water Conservation conference held in 1989 are collected. Topics include basic processes (e.g. soil structure, soil erosion, soil compaction); management options (e.g. conservation tillage); policy issues and priorities

Alley Farming

Author : B. T. Kang
Publisher : IITA
ISBN 13 : 0333600800
Total Pages : 121 pages
Book Rating : 4.3/5 (336 download)

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Book Synopsis Alley Farming by : B. T. Kang

Download or read book Alley Farming written by B. T. Kang and published by IITA. This book was released on 1999 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tropical Agriculturalist is a series of practical field guides and textbooks for: producers, farmers and farm managers, agricultural extension officers agricultural diploma, degree and vocational students, teachers and lecturers, senior secondary students, as reference books, adult education, rural and community development programmes.