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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
11/03/2016 |
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Data da última atualização: |
11/03/2016 |
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Autoria: |
HUMPHREYS, L. R. |
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Título: |
Tropical forages : their role in sustainable agriculture. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Essex: Longman, 1994. |
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Páginas: |
414p. |
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ISBN: |
0582078687 |
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Idioma: |
Português |
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Conteúdo: |
Pressure on the land resources of the tropics and subtropics has increased as the numbers of people supported by the land have risen. The cultivation of uplands which are marginally suited to annual cropping has led to decreasing soil fertility and declining crop yields. Increased run-off from these lands has altered the hydrological characteristics of the watersheds, and the soil eroded represents the loss of irreplaceable resources. Continous monocropping leads to the development of intransigent problems of disease, pest or weed infestation. In the humid tropics plantation agriculture is vulnerable to world price fluctuations, and farmers dependent upon a single export commodity seek to diversify their operations. Tropical forages are playing an increasing role in the development of sustainable cropping systems, and a new technology of forage improvement has arisen. This book begins by outlining the objectives of the interaction between crops, pastures and animals. These may be directed primarily to the maintenance or repair of soil fertility, as reflected by the nitrogen accretion due to forage legumes, the organic matter status, attributes of soil structure, the control of erosion and the spatial transfer of nutrients. The integration of forages in cropping systems may also lead to more efficient utilization of environmental resources, as represented by energy flows, moisture conservation and crop protection, whilst the added flexibility of production can lead to diversification and stabilization of farm income. Principles for the management of various types of crop/forage systems are described. Pasture with tree crops may involve coconut, rubber, oil palm and fruit crops, representing developed land whose use may be intensified; or agroforestry in which timber and animal products are the outputs. Alley farming, in which shrub legumes are grown in conjunction with annual crops and are fed to livestock, has gained favour in some tropical regions as an innovative technology. The concept of ley pastures in rotation with annual crops requires revaluation, whilst the planting or regeneration of pastures after an annual cropping phase is widely practised. The integration of animals in annual cropping systems is favoured by companion or relay cropping with forage crop legumes, whilst the complementary use of crop and pasture lands is a feature of some systems where ruminants are used for draught as well as meat or milk. Environmental protection and the maintenance of agriculture require the wide adoption of forages in tropical cropping systems. This book outlines the science upon which this adoption may be based. MenosPressure on the land resources of the tropics and subtropics has increased as the numbers of people supported by the land have risen. The cultivation of uplands which are marginally suited to annual cropping has led to decreasing soil fertility and declining crop yields. Increased run-off from these lands has altered the hydrological characteristics of the watersheds, and the soil eroded represents the loss of irreplaceable resources. Continous monocropping leads to the development of intransigent problems of disease, pest or weed infestation. In the humid tropics plantation agriculture is vulnerable to world price fluctuations, and farmers dependent upon a single export commodity seek to diversify their operations. Tropical forages are playing an increasing role in the development of sustainable cropping systems, and a new technology of forage improvement has arisen. This book begins by outlining the objectives of the interaction between crops, pastures and animals. These may be directed primarily to the maintenance or repair of soil fertility, as reflected by the nitrogen accretion due to forage legumes, the organic matter status, attributes of soil structure, the control of erosion and the spatial transfer of nutrients. The integration of forages in cropping systems may also lead to more efficient utilization of environmental resources, as represented by energy flows, moisture conservation and crop protection, whilst the added flexibility of production can lead to diversi... Mostrar Tudo |
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Palavras-Chave: |
Agricultura sustentavel; Agriculture; Agroforestry; Agrossilvicultura; Consorciacao; Cropping systems; Culturas tropicais; Degradacao; Deterioracao; Erosao; Erosion; Farming systems; Feed crops; Fertilidade; Fertility; Fixacao de nitrogenio; Forage plants; Husbancry; Land resource; LForragem; Management; Manejo; Mixed cropping; Nitrogen fixation; Pastagem; Pastagens; Pasture; Pastures; Pecuaria; Pesquisa; Plant protection; Planta forrageira; Producao animal; Protecao de planta; Recurco da terra; Regiao tropical; Research; Sistema de producao; Sistemas; Soil deterioration; Soils; Solo; Sustainability; Sustainable agriculture; Sustentabilidade; Tropical crops; Tropicos; Tropics. |
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Categoria do assunto: |
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Marc: |
LEADER 04394nam a2200709 a 4500
001 1010158
005 2016-03-11
008 1994 bl uuuu 00u1 u #d
020 $a0582078687
100 1 $aHUMPHREYS, L. R.
245 $aTropical forages$btheir role in sustainable agriculture.
260 $aEssex: Longman$c1994
300 $a414p.
520 $aPressure on the land resources of the tropics and subtropics has increased as the numbers of people supported by the land have risen. The cultivation of uplands which are marginally suited to annual cropping has led to decreasing soil fertility and declining crop yields. Increased run-off from these lands has altered the hydrological characteristics of the watersheds, and the soil eroded represents the loss of irreplaceable resources. Continous monocropping leads to the development of intransigent problems of disease, pest or weed infestation. In the humid tropics plantation agriculture is vulnerable to world price fluctuations, and farmers dependent upon a single export commodity seek to diversify their operations. Tropical forages are playing an increasing role in the development of sustainable cropping systems, and a new technology of forage improvement has arisen. This book begins by outlining the objectives of the interaction between crops, pastures and animals. These may be directed primarily to the maintenance or repair of soil fertility, as reflected by the nitrogen accretion due to forage legumes, the organic matter status, attributes of soil structure, the control of erosion and the spatial transfer of nutrients. The integration of forages in cropping systems may also lead to more efficient utilization of environmental resources, as represented by energy flows, moisture conservation and crop protection, whilst the added flexibility of production can lead to diversification and stabilization of farm income. Principles for the management of various types of crop/forage systems are described. Pasture with tree crops may involve coconut, rubber, oil palm and fruit crops, representing developed land whose use may be intensified; or agroforestry in which timber and animal products are the outputs. Alley farming, in which shrub legumes are grown in conjunction with annual crops and are fed to livestock, has gained favour in some tropical regions as an innovative technology. The concept of ley pastures in rotation with annual crops requires revaluation, whilst the planting or regeneration of pastures after an annual cropping phase is widely practised. The integration of animals in annual cropping systems is favoured by companion or relay cropping with forage crop legumes, whilst the complementary use of crop and pasture lands is a feature of some systems where ruminants are used for draught as well as meat or milk. Environmental protection and the maintenance of agriculture require the wide adoption of forages in tropical cropping systems. This book outlines the science upon which this adoption may be based.
653 $aAgricultura sustentavel
653 $aAgriculture
653 $aAgroforestry
653 $aAgrossilvicultura
653 $aConsorciacao
653 $aCropping systems
653 $aCulturas tropicais
653 $aDegradacao
653 $aDeterioracao
653 $aErosao
653 $aErosion
653 $aFarming systems
653 $aFeed crops
653 $aFertilidade
653 $aFertility
653 $aFixacao de nitrogenio
653 $aForage plants
653 $aHusbancry
653 $aLand resource
653 $aLForragem
653 $aManagement
653 $aManejo
653 $aMixed cropping
653 $aNitrogen fixation
653 $aPastagem
653 $aPastagens
653 $aPasture
653 $aPastures
653 $aPecuaria
653 $aPesquisa
653 $aPlant protection
653 $aPlanta forrageira
653 $aProducao animal
653 $aProtecao de planta
653 $aRecurco da terra
653 $aRegiao tropical
653 $aResearch
653 $aSistema de producao
653 $aSistemas
653 $aSoil deterioration
653 $aSoils
653 $aSolo
653 $aSustainability
653 $aSustainable agriculture
653 $aSustentabilidade
653 $aTropical crops
653 $aTropicos
653 $aTropics
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Biblioteca Rui Tendinha (BRT) |
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| 16. |  | MARIN,S. L. D.; DOUSSEAU, S.; LEDO, C. A. da. S. Melhoramento genético de mamão (Carica papaya L.) no Brasil, México e nas Ilhas Canárias, Espanha. In: SIMPÓSIO DO PAPAYA BRASILEIRO, 7. , Vitória, ES. Produção e sustentabilidade hídrica. Anais... [recurso eletrônico] / organizador, David dos Santos Martins. Vitória, ES : Incaper, 2018.| Tipo: Capítulo em Livro Técnico-Científico |
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| 17. | | THUNG, M.; FERREIRA, R.M.; MIRANDA, P.; MODA-CIRINO, V.; FERRÃO, M. A. G.; SILVA, L.O. da; DOURADO, V.V.; HEMP, S.; SOUZA, B.; SERPA, J.E.S.; ZIMMERMANN, M.J. de O.; SINGH, S.P. Performance in Brazil and Colombia of common bean lines from the second selection cycle. Revista Brasileira de Genetica, Ribeirao Preto v.16, n.1, p.115-127, 1993.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: - - - |
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| Registros recuperados : 187 | |
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