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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura; Embrapa Semiárido. |
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Data corrente: |
27/02/2015 |
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Data da última atualização: |
27/02/2015 |
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Tipo da produção científica: |
Circular Técnica |
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Autoria: |
COELHO, E. F.; SIMOES, W. L. |
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Afiliação: |
EUGENIO FERREIRA COELHO, CNPMF; WELSON LIMA SIMOES, CPATSA. |
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Título: |
Onde posicionar sensores de umidade e de tensão de água do solo próximo da planta para um manejo mais eficiente da água de irrigação. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Cruz das Almas, BA: Embrapa Mandioca e Fruticultura, 2015. |
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Série: |
(Embrapa Mandioca e Fruticultura. Circular Técnica, 109). |
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ISSN: |
1809-5011 |
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Idioma: |
Português |
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Conteúdo: |
A irrigação eficiente é aquela com menor consumo de energia e menor perda de água, contribuindo na maior conservação dos recursos hídricos, por ser aplicada no momento correto, isto é, aquele em que a umidade do solo começa a comprometer a absorção de água pela planta. Essa irrigação eficiente requer também a reposição correta da água perdida pelas plantas desde a última irrigação. Os sensores que medem a umidade e a tensão de água do solo são instrumentos para se alcança uma irrigação eficiente. Contudo, é preciso posicioná-los adequadamente na zona radicular das plantas para que se possa definir corretamente quando irrigar e o quanto de água aplicar. Essa circular técnica reúne resultados de estudos conduzidos nos últimos anos para recomendar onde posicionar os sensores de umidade e de tensão de água do solo na zona radicular de diferentes fruteiras tropicais de forma a contribuir para maximização da eficiência de uso de água na irrigação. |
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Palavras-Chave: |
Eficiência de água; Fruticultura irrigada; Sensor de água; Sensor de umidade; Tensão de água. |
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Thesagro: |
Agricultura; Irrigação; Sistema Radicular. |
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Thesaurus Nal: |
Irrigation. |
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Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/118884/1/CircularTecnica-109-Onde-posicionar-sensores.pdf
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Marc: |
LEADER 01840nam a2200253 a 4500
001 2010147
005 2015-02-27
008 2015 bl uuuu u0uu1 u #d
022 $a1809-5011
100 1 $aCOELHO, E. F.
245 $aOnde posicionar sensores de umidade e de tensão de água do solo próximo da planta para um manejo mais eficiente da água de irrigação.$h[electronic resource]
260 $aCruz das Almas, BA: Embrapa Mandioca e Fruticultura$c2015
490 $a(Embrapa Mandioca e Fruticultura. Circular Técnica, 109).
520 $aA irrigação eficiente é aquela com menor consumo de energia e menor perda de água, contribuindo na maior conservação dos recursos hídricos, por ser aplicada no momento correto, isto é, aquele em que a umidade do solo começa a comprometer a absorção de água pela planta. Essa irrigação eficiente requer também a reposição correta da água perdida pelas plantas desde a última irrigação. Os sensores que medem a umidade e a tensão de água do solo são instrumentos para se alcança uma irrigação eficiente. Contudo, é preciso posicioná-los adequadamente na zona radicular das plantas para que se possa definir corretamente quando irrigar e o quanto de água aplicar. Essa circular técnica reúne resultados de estudos conduzidos nos últimos anos para recomendar onde posicionar os sensores de umidade e de tensão de água do solo na zona radicular de diferentes fruteiras tropicais de forma a contribuir para maximização da eficiência de uso de água na irrigação.
650 $aIrrigation
650 $aAgricultura
650 $aIrrigação
650 $aSistema Radicular
653 $aEficiência de água
653 $aFruticultura irrigada
653 $aSensor de água
653 $aSensor de umidade
653 $aTensão de água
700 1 $aSIMOES, W. L.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
24/01/2008 |
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Data da última atualização: |
23/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
SIEGMUND-SCHULTZE, M.; RISCHKOWSKY, B.; VEIGA, J. B. da; KING, J. M. |
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Afiliação: |
M. Siegmund-Schultze, University of Gottingen; B. Rischkowsky, University of Gottingen; Jonas Bastos da Veiga, CPATU; J. M. King, University of Gottingen. |
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Título: |
Cattle are cash generating assets for mixed smallholder farms in the Eastern Amazon. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Agricultural Systems, v. 94, n.3, p.738-749, 2007. |
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DOI: |
http://dx.doi.org/10.1016/j.agsy.2007.03.005 |
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Idioma: |
Inglês |
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Notas: |
Disponível também on-line. |
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Conteúdo: |
The presence of cattle in the Amazon region is controversial in terms of their ecological suitability and profitability compared with crops. Nevertheless, they are widely distributed in the study area in north-eastern Pará and, contrary to the common image of cattle on large ranches, a high proportion of them are kept on smallholder farms. To explain their presence, cattle are assumed to have benefits beyond physical production, such as complementing resource use or representing capital. To test this hypothesis, the costs and benefits of the three main agricultural activities, cattle, cassava and black pepper production, in terms of land, labour and capital productivity, were recorded in 37 small farms over a period of 15 months. To provide a longer perspective, benefits and costs of these activities were calculated for their assumed lifetime, which in the case of cattle, assumed a stable herd, derived from a deterministic herd model. The resultant values for land, labour and capital productivity of cattle were much lower than the values derived from direct observations during the study period, and were not as high as those for cassava and black pepper. Furthermore, the analysis of resource use in the farms showed that cattle production was not usually integrated with cropping activities, did not improve the use of available labour, and competed for land. Therefore, there had to be a reason for keeping cattle beyond their physical productivity. It was deduced to be their functional quality. Cattle could be disposed of quickly and easily at any time, in order to acquire large sums of cash or the equivalent in kind. The liquidity derived from keeping living stock was not matched by other agricultural activities or by the financial market. Hence, cattle turned out to be the best instrument of finance for the smallholder. Farmers were not interested in the continuous development of their herds, or sustainable production practices, and favoured low input management. Consequently, development plans relying on long-term, continuous commitments to pasture and cattle management are inappropriate. Instead, research and extension work should focus on simple, flexible and low-cost improvements to cattle keeping on crop-livestock smallholder farms, until credit programmes are available that replace the financing function of cattle. MenosThe presence of cattle in the Amazon region is controversial in terms of their ecological suitability and profitability compared with crops. Nevertheless, they are widely distributed in the study area in north-eastern Pará and, contrary to the common image of cattle on large ranches, a high proportion of them are kept on smallholder farms. To explain their presence, cattle are assumed to have benefits beyond physical production, such as complementing resource use or representing capital. To test this hypothesis, the costs and benefits of the three main agricultural activities, cattle, cassava and black pepper production, in terms of land, labour and capital productivity, were recorded in 37 small farms over a period of 15 months. To provide a longer perspective, benefits and costs of these activities were calculated for their assumed lifetime, which in the case of cattle, assumed a stable herd, derived from a deterministic herd model. The resultant values for land, labour and capital productivity of cattle were much lower than the values derived from direct observations during the study period, and were not as high as those for cassava and black pepper. Furthermore, the analysis of resource use in the farms showed that cattle production was not usually integrated with cropping activities, did not improve the use of available labour, and competed for land. Therefore, there had to be a reason for keeping cattle beyond their physical productivity. It was deduced to be their fun... Mostrar Tudo |
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Palavras-Chave: |
Brasil; smallholder. |
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Thesagro: |
Gado; Pecuarista. |
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Thesaurus NAL: |
Amazonia; cattle. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03100naa a2200253 a 4500
001 1409223
005 2022-11-23
008 2007 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.agsy.2007.03.005$2DOI
100 1 $aSIEGMUND-SCHULTZE, M.
245 $aCattle are cash generating assets for mixed smallholder farms in the Eastern Amazon.$h[electronic resource]
260 $c2007
500 $aDisponível também on-line.
520 $aThe presence of cattle in the Amazon region is controversial in terms of their ecological suitability and profitability compared with crops. Nevertheless, they are widely distributed in the study area in north-eastern Pará and, contrary to the common image of cattle on large ranches, a high proportion of them are kept on smallholder farms. To explain their presence, cattle are assumed to have benefits beyond physical production, such as complementing resource use or representing capital. To test this hypothesis, the costs and benefits of the three main agricultural activities, cattle, cassava and black pepper production, in terms of land, labour and capital productivity, were recorded in 37 small farms over a period of 15 months. To provide a longer perspective, benefits and costs of these activities were calculated for their assumed lifetime, which in the case of cattle, assumed a stable herd, derived from a deterministic herd model. The resultant values for land, labour and capital productivity of cattle were much lower than the values derived from direct observations during the study period, and were not as high as those for cassava and black pepper. Furthermore, the analysis of resource use in the farms showed that cattle production was not usually integrated with cropping activities, did not improve the use of available labour, and competed for land. Therefore, there had to be a reason for keeping cattle beyond their physical productivity. It was deduced to be their functional quality. Cattle could be disposed of quickly and easily at any time, in order to acquire large sums of cash or the equivalent in kind. The liquidity derived from keeping living stock was not matched by other agricultural activities or by the financial market. Hence, cattle turned out to be the best instrument of finance for the smallholder. Farmers were not interested in the continuous development of their herds, or sustainable production practices, and favoured low input management. Consequently, development plans relying on long-term, continuous commitments to pasture and cattle management are inappropriate. Instead, research and extension work should focus on simple, flexible and low-cost improvements to cattle keeping on crop-livestock smallholder farms, until credit programmes are available that replace the financing function of cattle.
650 $aAmazonia
650 $acattle
650 $aGado
650 $aPecuarista
653 $aBrasil
653 $asmallholder
700 1 $aRISCHKOWSKY, B.
700 1 $aVEIGA, J. B. da
700 1 $aKING, J. M.
773 $tAgricultural Systems$gv. 94, n.3, p.738-749, 2007.
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Embrapa Amazônia Oriental (CPATU) |
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