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In Cuba a significant potential for biogas production and utilization is observed, based on the diversity and volume of contaminating residues generated by the agricultural and agri-food sectors; however, this potential is not accurately known yet to utilize such information in the decision-making processes that contribute to national bioenergy development. In that sense, the objective of the paper is to offer an evaluation of the biogas production and utilization potential in the country. To facilitate the evaluation, the study was divided by sectors (MINAG, MINAL, AzCUBA); within the animal husbandry sector, it was subdivided into poultry, pig (state and cooperative producers) and cattle, but only the productive activity directly linked to MINAG was taken into consideration. In the case of the industry sector (MINAL and AzCUBA), data were taken from the 12 most contaminant industries and from the alcohol distilleries, respectively. The daily potential of biogas production is 674 609 m³, in which the pig and poultry production stand out; this potential means an energy production of 1 477 394 MWh/year, equivalent to 132 856 t of diesel, whose import costs 48 615 065 USD Cuba according to the current prices. Likewise, if the intensity in CO2 of diesel is considered, the emissions prevented due to the substitution of this fossil fuel by biogas are estimated in 440 778 t CO2 eq/year. [ABSTRACT FROM AUTHOR]

This paper presents the procedure to implement the Technological Innovation Management in the university-Cuban state animal husbandry enterprise relation and its validation in the case study University of Pinar del Río and Camilo Cienfuegos Genetic Animal Husbandry Enterprise. The procedure had three phases, with their corresponding steps (eight); in addition, 18 indicators, considered relevant for technology management in the university-enterprise relation, were identified, organized in four dimensions: institutional feedback, economic productive, environmental and social pertinence. These indicators become a key aspect for the evaluation of the model. It was determined that the three indicators with the best results were: the degree of application of the diagnosis in the enterprise, with the companionship of the university per year; the degree in which training generated changes and transformations in the use of the technologies per year; and the degree of planning, organization and contracting of R + D + i projects per year. [ABSTRACT FROM AUTHOR]

This paper presents a descriptive and evaluative analysis of the productive and environmental of SPSi with Leucaena leucocephala (Lam.) de Wit, emphasizing the nutritional quality, biomass production, voluntary intake, animal productivity and greenhouse gas emission aspects. For such purpose, a bibliographic review was made about the studies in the last 15 years, concerning animal production systems under tropical conditions, stressing the ones conducted in Colombia. It was noticed that the forage offer in SPSi with leucaena has a protein content higher than 22 % and a lower fiber content (20-30 %) with regards to most tropical pastures. Additionally, leucaena has the capacity to withstand intense browsing, and its presence increases plant and animal productivity. The animals produce at least two or three times more meat and milk ha-1 year-1 as the result of a higher nutrient intake and higher forage offer, because with this legume the dry matter (DM) intake can be 1,3 times higher than the one observed in conventional systems, and the forage production can be from 5 to 18 t DM ha-1. On the other hand, the inclusion of L. leucocephala allows to decrease the enteric emissions of CH4 in amounts close to 20 % per kilogram of produced meat or milk and per kilogram of consumed dry matter. Compared with the traditional systems, in the ones in which L. leucocephala is included, the efficiency in production is increased and the negative environmental effects of animal husbandry are decreased. [ABSTRACT FROM AUTHOR]