خيارات البحث
النتائج 21 - 30 من 6,038
Water, energy, and food nexus in an arid valley under intensive exploitation | El nexo agua, energía y alimentos en un valle árido bajo explotación intensiva النص الكامل
2023
Miguel, Roberto Esteban | Gareis, María Cecilia
Aims: characterize the territory of the Antinaco-Los Colorados Central Valley based on the water-energy-food nexus; problematize the nexus by linking the evolution of groundwater resources and energy consumption for irrigation; and identify actors to conform a Political and Technical Council. Methodology: the territorial characterization was developed from the analysis of secondary information considering the three pillars of the nexus and its problematization was carried out by articulating the piezometric; the loss of reserves and electricity consumption data for irrigation; The identification of actors was carried out using a participatory sociogram technique. Results: piezometric levels decrease annually with a depletion of groundwater reserves, therefore, energy for irrigation increases. This situation accounts for the (un)sustainability of the system in the strong term. The analysis of actors shows the possibility of forming a Technical and Political Council for the prospective development of the valley from the nexus approach. Limitations: analyse the economic scarcity of water, propose trend scenarios and deepen the understanding of the rationalities of groups of producers to know the logic in the use of resources. Conclusions: the current uses and modes of resource management demand changes around the physical limits of natural resources. | Objetivos: caracterizar el territorio del Valle Central Antinaco-Los Colorados en función del nexo agua energía y alimentos; problematizar el nexo al vincular la evolución del recurso hídrico subterráneo y el consumo de energía para riego agrícola; e identificar actores para conformar un Consejo Político y Técnico. Metodología: la caracterización territorial se elaboró a partir del análisis de información secundaria considerando los tres pilares del nexo y su problematización se efectuó a partir de articular la piezométrica; la pérdida de reservas y los datos de consumo de energía eléctrica para riego; la identificación de actores se realizó bajo técnica participativa de sociograma. Resultados: los niveles piezométricos descienden anualmente con una pérdida constante de reservas de agua subterránea, por lo tanto, la energía para riego se incrementa. Esta situación da cuenta de la (in)sustentabilidad del sistema en el sentido fuerte del término. El análisis de actores evidencia la posibilidad de conformar un Consejo Técnico y Político para el desarrollo prospectivo del valle desde el enfoque del nexo. Limitaciones: analizar la escasez económica del agua, plantear escenarios tendenciales y profundizar el entendimiento de las racionalidades de grupos de productores para comprender las lógicas en el uso de recursos. Conclusiones: los actuales usos y modos de gestión de los recursos demandan de cambios en torno a los límites físicos de los recursos naturales.
اظهر المزيد [+] اقل [-]Water for Food – Water for Life
2013
CGIAR Challenge Program on Water and Food
Water for food, water for life
2010
Sharma, Bharat R.
Performance of carassius auratus with different food strategies in water recirculation system | Desempenho de carassius auratus com diferentes estratégias alimentares em sistema de recirculação de água النص الكامل
2010
Moreira, R. L. | Da Costa, J. M. | Teixeira, E. G. | Moreira, A. G. L. | De Moura, P. S. | Rocha, R. S. | Vieira, R. H. S. F.
The efficiency of a recirculation system for the cultivation of C. auratus, fed with natural and artificial diets was evaluated. The experiment consisted of four treatments with four replicates. The first two treatments used recirculation system and the last two static system. In the first and fourth treatment, animals were fed with brine shrimp biomass (50% CP), while in the second and third treatments a commercial flake ration (42% CP) was used. At the end of cultivation (60 days), water samples were taken from all experimental units and subjected to standard plate count for determining the density of mesophilic bacteria. Final weight (g), final length (cm), specific growth rate (% day -1) and weight gain (%) were significantly different (p | A eficiência de um sistema de recirculação para o cultivo de C. auratus, alimentados com dieta natural e artificial foi avaliada. O experimento consistiu de quatro tratamentos com quatro repetições. Os dois primeiros tratamentos utilizaram sistemas de recirculação e os dois últimos sistemas estáticos. No primeiro e quarto tratamento, os animais foram alimentados com biomassa de artêmia (PB 50%), enquanto nos tratamentos dois e três, com ração comercial em flocos (42% PB). Ao final do cultivo (60 dias), amostras de água foram coletadas em todas as unidades experimentais e submetidos a contagem padrão em placas para determinação da densidade de bactérias mesófilas. O peso final (g), com-primento final (cm), taxa de crescimento específico (% dia-1) e ganho de peso (%) foram signifi-cativamente diferentes (p
اظهر المزيد [+] اقل [-]Global Challenge Program on Water and Food | Challenge Program on Water and Food | CGIAR Challenge Program on Water and Food
2002
Water, food and development: the CGIAR Challenge Program on Water and Food النص الكامل
2009
J. Woolley | S. E. Cook | D. Molden | L. Harrington
Water, food and development: the CGIAR Challenge Program on Water and Food النص الكامل
2009
J. Woolley | S. E. Cook | D. Molden | L. Harrington
Providing the water needed to produce food for more than 9 billion people by 2050 seems simple: agriculture must produce more food with less water. However, three complex issues are involved: First, water, food production and rural development do not have a simple correlation. Second, there are interactions between processes at local, basin and global scales. Third, change involves people in complex networks of institutions. The Challenge Program on Water and Food brings together agriculturalists, hydrologists and development specialists in a global-to-local programme that focuses on change through institutions. We believe that this scale, complexity and involvement are necessary to deliver plausible change.
اظهر المزيد [+] اقل [-]Water, food and development: the CGIAR Challenge Program on Water and Food النص الكامل
2009
Woolley, Jonathan N. | Cook, Simon E. | David, S. | Harrington, Larry W.
Providing the water needed to produce food for more than 9 billion people by 2050 seems simple: agriculture must produce more food with less water. However, three complex issues are involved: First, water, food production and rural development do not have a simple correlation. Second, there are interactions between processes at local, basin and global scales. Third, change involves people in complex networks of institutions. The Challenge Program on Water and Food brings together agriculturalists, hydrologists and development specialists in a global-to-local programme that focuses on change through institutions. We believe that this scale, complexity and involvement are necessary to deliver plausible change.
اظهر المزيد [+] اقل [-]Water, food and development: the CGIAR Challenge Program on Water and Food النص الكامل
2009
Woolley, Jonathan N. | Cook, Simon E. | David, S. | Harrington, Larry W.
Providing the water needed to produce food for more than 9 billion people by 2050 seems simple: agriculture must produce more food with less water. However, three complex issues are involved: First, water, food production and rural development do not have a simple correlation. Second, there are interactions between processes at local, basin and global scales. Third, change involves people in complex networks of institutions. The Challenge Program on Water and Food brings together agriculturalists, hydrologists and development specialists in a global-to-local programme that focuses on change through institutions. We believe that this scale, complexity and involvement are necessary to deliver plausible change.
اظهر المزيد [+] اقل [-]