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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
12/06/1995 |
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Data da última atualização: |
17/03/2025 |
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Autoria: |
VERA, R. R.; THOMAS, R.; SANINT, L.; SANZ, J. I. |
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Afiliação: |
RAUL R. VERA, CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL; RICHARD THOMAS, CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL; LUIS SANINT, CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL; JOSÉ I. SANZ, CENTRO INTERNACIONAL DE AGRICULTURA TROPICAL. |
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Título: |
Development of sutainable ley-farming systems for the acid-soil savannas of tropical America. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, v. 64, supl. 1, p. 105-125, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: The paper reviews the evolution of the agricultural and livestock sectors in the neotropical savannas of Latin America, and their contribution to economic development and human nutrition. It is shown that the savannas are responsible for an increasing share of total agricultural production in Brazil, Colombia and Venezuela. The natural resources of these savanna lands are discussed, with emphasis on the physico-chemical characteristics of the soils, and the constraints that they impose on crop and pasture production. The development of acid-soil tolerant crops and forages is briefly summarized. Mechanisms of adaptation are described, and the contribution of adapted germplasm to soil enhancement is discussed. Lastly, the paper reviews studies conducted in Colombia to research crop-pasture integration in tropical ley-farming systems, using selected adapted rice lines and grass and legume forages as experimental models. Evidence collected over four consecutive years clearly shows the technical feasibility of developing alternative systems that combine annual crops and grazed pastures using low external inputs and enhancing soil characteristics. Ex-ante economic analysis reveals that these systems are also highly profitable. |
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Thesagro: |
Acidez do Solo; Agricultura Sustentável; Cerrado; Desenvolvimento Sustentável. |
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Thesaurus Nal: |
savannas. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
null
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Embrapa Cerrados (CPAC) |
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