Cu-ID: https://cu-id.com/1996/ojs890 Redirecciones: 40 URL: https://cjascience.com/index.php/CJAS/article/view/890 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/890 BibTeX: @article{Characterization_of_the_edaphic_mesofauna_in_five_grassland_agroecosystems_of_Granma_province,_Cuba, title = {Characterization of the edaphic mesofauna in five grassland agroecosystems of Granma province, Cuba}, author = {Chávez Suárez, Licet and Estrada Prado, W. and Labrada Hernández, Yaquelín and Rodríguez García, Idalmis and Herrera Villafranca, Magalys}, journal = {Cuban Journal of Agricultural Science}, volume = {53}, number = {2}, pages = {}, year = {2019-04-23}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs890}, cu_id = {https://cu-id.com/1996/ojs890}, abstract = {The edaphic mesofauna performs essential functions in the soil such as the recycling of nutrients and formation of its microstructure. The objective of this research was to characterize the edaphic mesofauna in five grassland agroecosystems of Granma province, Cuba. To this end, contrasting agroecosystems were selected in terms of soil type, grassland and productive purpose (“Estación de Pastos”, “Ojo de agua”, "El Triángulo", "El Progreso" and "Cupeycito"). The pitfall traps were used, with a 0.003 % detergent solution. The individuals were extracted and counted and placed in vials, with 70 % ethanol, for later identification. Individualsbelonging to two classes, four orders, six families and seven genera were found. The Collembola order was the best represented with five genera. Only in the third sampling there was a significant influence of the season detected on some of the studied variables, specifically for each agroecosystem. The Shannon index showed values lower than 1.35; while the dominance indexes showed values close to or higher than 0.5 in most cases. It is concluded that the richness and abundance of the edaphic mesofauna in the studied grassland agroecosystems was low and very variable in both climatic periods. Individuals belonging to the trophiccategories of predators and detritivores were found which showed a variable relative abundance, in each agroecosystem and sampling performed; except in the “Estación de Pastos” where there was a predominance of predators.Key words: acari, collembolans, grasses, soils, pitfall traps}, }
Cu-ID: https://cu-id.com/1996/ojs866 Redirecciones: 28 URL: https://cjascience.com/index.php/CJAS/article/view/866 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/866 BibTeX: @article{The_rural_Living_Well_and_the_collective_construction_of_Community_Life_Projects, title = {The rural Living Well and the collective construction of Community Life Projects}, author = {Souza, J.}, journal = {Cuban Journal of Agricultural Science}, volume = {53}, number = {1}, pages = {}, year = {2019-01-31}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs866}, cu_id = {https://cu-id.com/1996/ojs866}, abstract = {Innovation institutions are at a historic crossroads. Given the civilization crisis condi-tioning the collapse of "development", either these institutions continue reproducing "innovation for development", to the detriment of human and non-human life, or they build modes of innovation committed to the Buen Vivir (Living Well) of Peoples, an emerging paradigm alternative to the development paradigm. For institutions aspiring to contribute to the construction of rural Living Well - happy rural communities with sus-tainable livelihoods - the article provides: (a) a conceptual framework on the vulnerabil-ity-sustainability of rural livelihoods in Latin America, (b) decolonizing questions of the thinking that reproduces the development paradigm; (c) emancipatory premises to in-spire women and men wanting to build the rural Living Well in Latin America; and (d) a methodological path for the collective construction of Community Life Projects incorpo-rating 'seeds of the rural Living Well'. The conclusion is an ethical invitation to build the 'day after development'.Key words: civilization crisis, innovation for development, family farming, rural liveli-hoods, innovation for Living Well.}, }
Cu-ID: https://cu-id.com/1996/ojs838 Redirecciones: 42 URL: https://cjascience.com/index.php/CJAS/article/view/838 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/838 BibTeX: @article{Yield_components,_chemical_characterization_and_polyphenolic_profile_of_Tithonia_diversifolia_in_Valle_del_Cauto,_Cuba, title = {Yield components, chemical characterization and polyphenolic profile of Tithonia diversifolia in Valle del Cauto, Cuba}, author = {Verdecia, D. M. and Herrera, R. S. and Ramírez, J. L. and Bodas, R. and Leonard, I. and Giraldéz, F. J. and Andrés, S. and Santana, A. and Méndez-Martínez, Y. and López, S.}, journal = {Cuban Journal of Agricultural Science}, volume = {52}, number = {4}, pages = {}, year = {2018-10-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs838}, cu_id = {https://cu-id.com/1996/ojs838}, abstract = {In order to determine the effect of regrowth age on the components of yield, chemical composition and polyphenolic profile of Tithonia diversifolia, an experiment was carried out using a randomized block design with four replications in brown soil with carbonate. The treatments consisted of three regrowth ages (60, 120 and 180 days). To establish the functional relationship between the different evaluated indicators and age, linear, quadratic, cubic and Gompertz equations were analyzed, selecting the best fit according to high value of R2, high significance of the terms and of the equation, low standard error of estimation and of terms, and significant contribution of terms and of the equation. The equations of the best fit for the functional relationship between the different evaluated indicators and age, in each seasonal period, were quadratic. There was an increase in yield of dry matter, NDF, ADF, ADL with age, with maximum values at 180 days (23.92t/ha, 47.63, 31.38 and 21.01%, respectively); edible biomass, CP, cellular content, invitro degradability of dry matter decreased with age and the best values were obtained at 60 days (26.16 t/ha, 27.49 %, 59.56 % and 75.78 %, respectively) and the contents of total phenols, total tannins, total condensed tannins, free condensed tannins and condensed tannins bound to the fiber showed their highest values during the rainy period (12.36, 5.36, 14.55, 4.07 and 11.16 g/kgDM, respectively). The regression equations that explain the close relationship of age with yield, chemical composition and degradability were established, as well as response patterns were established for each seasonal period. It is recommended to endorse these results in other climatic and management conditions of the species.Key words: yield components, chemical composition, secondarymetabolites}, }
Cu-ID: https://cu-id.com/1996/ojs837 Redirecciones: 31 URL: https://cjascience.com/index.php/CJAS/article/view/837 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/837 BibTeX: @article{Morphometric_analysis_of_the_gastrointestinal_tract_of_rabbits_fed_mulberry_forage_and_sugarcane_stems, title = {Morphometric analysis of the gastrointestinal tract of rabbits fed mulberry forage and sugarcane stems}, author = {Vázquez, Ysnagmy and Valdivié, M. and Berrios, I. and Sosa, E.}, journal = {Cuban Journal of Agricultural Science}, volume = {52}, number = {4}, pages = {}, year = {2018-10-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs837}, cu_id = {https://cu-id.com/1996/ojs837}, abstract = {An amount of 30 rabbits (New Zealand x Chinchilla), 40 d old and 600 ± 50 g of liveweight were used in a completely randomized design, to study the effect of an alternative feeding system with mulberry forage and sugar cane stems on gastrointestinal organs. The treatments were: control diet with restricted feed (100 g) plus mulberry forage ad libitum and an alternative system with sugar cane stem ad libitum, mulberry forage ad libitum and 30 g of feed/rabbit/d (experimental). At the end of fattening, animals were slaughtered and the different sections of the digestive tract were isolated. The entire gastrointestinal tract and digestive organs (stomach, small intestine, cecum and colon-rectum) were weighed full and empty. Accessory organs (liver and pancreas) and the spleen were also weighed. The length of small intestine, cecum and rectum was measured and the absolute, relative and metabolic weights of the different segments and organs described above were obtained. Rabbits fed with the experimental treatment had lower absolute weight of the full stomach (56.03 g) and empty (30.18 g), as well as lower absolute and metabolic weight of the empty cecum (19.52 g and 0.07 g LW 0.75-1, respectively). Absolute weight of the liver decreased (P <0.05) with the inclusion of the alternative system. However, no differences were found in relative and metabolic weights. The use of the alternative system is feasible because it does not find a negative influence on the morphometry of the gastrointestinal organs of rabbits.Keywords: alternative feed, rabbits, sugar cane fiber, morphometry}, }
Cu-ID: https://cu-id.com/1996/ojs824 Redirecciones: 39 URL: https://cjascience.com/index.php/CJAS/article/view/824 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/824 BibTeX: @article{Production_of_xylanases_by_Bacillus_subtilis_E44_under_submerged_fermentation_conditions, title = {Production of xylanases by Bacillus subtilis E44 under submerged fermentation conditions}, author = {Matos, Madyu and Valdivia, Aymara and Rodríguez, Zoraya and Bocourt, R. and Brizuela, María A. and Portilla, Yadileiny and Rubio, Yasmary and Ramírez, H. L.}, journal = {Cuban Journal of Agricultural Science}, volume = {52}, number = {3}, pages = {}, year = {2018-07-17}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs824}, cu_id = {https://cu-id.com/1996/ojs824}, abstract = {Production of xylanases from microorganisms is useful for animal feeding. The objective of this research was to evaluate the xylanase production ability of Bacillus subtilis E44 strain under submerged fermentation conditions. Bacteria were inoculated in Petri dishes with beech xylan (1 %), and the production of xylanases was determined at 24, 48, 72 and 96 h. The formation of clear zones around the colonies after the revelation with Congo red 0.5 %, confirmed the production of enzymes by the strain, and the highest hydrolysis halo (24.7 mm ± 0.57) was obtained at 72 h. Power index showed significant differences for the evaluated times, the best was 4.59 at 72 h. Cellular growth and xilanase production by B. subtilis E44 under submerged fermentation was evaluated for 24 hours in a minimum medium with beech xylan salts and nutrient broth. The maximum activity of xylanases was 0.326 U/mL, at the end of the exponential phase of the culture in a minimum medium of salts plus xylan and 0.130 U/mL in a nutrient broth. Maximum production of xylanases was obtained at 12 h during the submerged fermentation and coincides with the decrease of proteolytic activity of Bacillus subtilis E44. The results show the ability of Bacillus subtilis E44 of expressing xilanase enzymes with the use of beech xylan as a carbon source under submerged culture conditions. These enzymes could improve quality of diets used for monogastric animals.Keywords: enzymes, hydrolysis halo, power index, enzymeactivity}, }
Cu-ID: https://cu-id.com/1996/ojs804 Redirecciones: 27 URL: https://cjascience.com/index.php/CJAS/article/view/804 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/804 BibTeX: @article{Non-genetic_effects_on_birth_weight_of_MEVEZUG_creole_sheep_in_Guerrero,_México, title = {Non-genetic effects on birth weight of MEVEZUG creole sheep in Guerrero, México}, author = {Catalán, A. and Hernández, Arelis and Fraga, L. M. and Meireles, E. J.}, journal = {Cuban Journal of Agricultural Science}, volume = {52}, number = {2}, pages = {}, year = {2018-05-28}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs804}, cu_id = {https://cu-id.com/1996/ojs804}, abstract = {A total of 1,157 records of the birth weight of 324 MEVEZUG creole sheep were used, with parturitions between 2004 and 2017, located at the Faculty of Veterinary Medicine and Zootechnics N.1 of the Autonomous University of Guerrero, Mexico. The purpose of the study was to determine the non-genetic factors that affected birth weight of lambs. A mixed generalized linear model was applied using the GLIMMIX SAS procedure, which considered birth year, birth season, parturition number, type of parturition and sex as fixed effects, and the random effect associated with each sheep. The general mean of birth weight was 2.71 kg. The studied non-genetic factors were significant (P <0.0001). The highest birth weights were obtained in the rainy season (2.48 ± 0.05 kg). Lambs born from the first calving of the sheep were less heavy, with a mean of 2.18 ± 0.04 kg. Single calving lambs were born with superior average weight (3.19 ± 0.04 kg) compared to double parturitions (2.58 ± 0.03 kg) and with triple and quadruple parturitions (2.07 ± 0.05 and 1.86 ± 0.11 kg, respectively). It is concluded that the effects of year and season of birth, parturition number, type of parturition and sex, had a significant effect on lamb birth weight. Therefore, these factors should be considered for general sheep herd management purposes, as well as for the future design of a breeding program for the MEVEZUG breed.Keywords: hair sheep, crosses, environmental factors}, }
Cu-ID: https://cu-id.com/1996/ojs460 Redirecciones: 31 URL: https://cjascience.com/index.php/CJAS/article/view/460 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/460 BibTeX: @article{Technological_alternatives_for_replacement_cows_in_the_Cauto_Valley, title = {Technological alternatives for replacement cows in the Cauto Valley}, author = {Ben?tez, D. and Ricardo, Yanet and Viamontes, M. I. and Romero, A. and Guevara, O. and Torres, Verena and Miranda, M. and Guerra, J. and Olivera, C.}, journal = {Cuban Journal of Agricultural Science}, volume = {43}, number = {4}, pages = {}, year = {2014-06-13}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs460}, cu_id = {https://cu-id.com/1996/ojs460}, abstract = {The behavior of replacement cows was evaluated up to their first calving. The cows were from rearing systems, and they were of dualpurpose. Crossbred Zebu cows were used for the production of female calves, as well as simple yards, mating per season and the manipulation of the lactation of the calf as reproductive technologies. A rational grazing system was designed for the feeding of the herds. The female calves were weighed at birth and at weaning, and remained all the time together with the cow, except those applied the seasonal weaning. The weaning was performed abruptly at eight months of age. Besides the cows described, crossbred yearling cows were used. They were from farms with rearing system or dual purpose. The herd was organized into two groups with line grazing, the lead was given grass at full availability. The protein deficiencies were complemented with legume banks. In another work, with three breeds, it was evaluated the influence of the mating season on the behavior in the reproductive cycles and on the growth of the growing female calves, during the period between 1981 and 2004. In the alternatives evaluated, the productivity of the breeders was increased up to 148 kg of weaned liveweight per cow in reproduction. The weaning weight increased up to 165 kg, the heifers were incorporated to reproduction with 300 kg of liveweight. The age at first calving was reduced up to 32 months and the birth rate was considered adequate for efficient exploitations. The application of the validated technologies permitted creating capacities for the production of replacement cows from the rearing units and of milk breeds, on sustainable basis with high biological and economical efficiency.Key words: grazing, mating, productivity, lactation, sustainability.}, }
Cu-ID: https://cu-id.com/1996/ojs427 Redirecciones: 47 URL: https://cjascience.com/index.php/CJAS/article/view/427 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/427 BibTeX: @article{Sustainable_increase_in_livestock_productivity_in_developing_countries_through_efficient_utilisation_of_feed_resources, title = {Sustainable increase in livestock productivity in developing countries through efficient utilisation of feed resources}, author = {Makkar, Harinder P. S.}, journal = {Cuban Journal of Agricultural Science}, volume = {48}, number = {1}, pages = {}, year = {2014-04-09}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs427}, cu_id = {https://cu-id.com/1996/ojs427}, abstract = {During last several decades world production of animal products has increased rapidly. Due to increasing incomes and economic growth, urbanization and population growth, the livestock will continue to be the most dynamic sub-sector of agriculture in the coming decades. The world would require 60-70% more meat and milk than the current consumption levels. Besides energy, availability of feed would be critical to meeting the projected demand of animal products. This is amidst growing concerns over scarcity of land, soil and water, food-feed-fuel competition and on-going global warming. In developing countries, the inability of farmers to feed animals adequately remains the major constraint in most livestock production systems. A concerted effort is required to sustainably meet the future rising demands of feed ingredients and feeds. The strategies that could address this challenge are: I) assess available feed resources and make the best use of them, II) enhance fodder availability and its use in place of concentrate component in the diet, which is expensive and contains components competing with human food, III) enlarge the feed resource base by tapping into new and unconventional resources that do not compete with human food, including the plants that are adapted tothe region and IV) enhance nutrient absorption from feeds by strategically using anthelmintics and mineral and vitamin mixtures in diets. In order to enhance livestock productivity, these efforts should go hand-in-hand with the use of proper animal genetic resources that match the environment, and the adoption of good management practices including provision of clean drinking water, and good animal comfort and health. An enhanced emphasis is required to increase nutrient use efficiency in ruminant production systems because ruminants have special place in the animal food value chain since they do not compete with human food and can produce human-edible animal protein from human-inedible sources such as grasses, crop residues and agro-industrial by-products.}, }
Cu-ID: https://cu-id.com/1996/ojs379 Redirecciones: 35 URL: https://cjascience.com/index.php/CJAS/article/view/379 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/379 BibTeX: @article{The_multivariate_statistics_applied_to_the_characterization_of_backyard_poultry_production_in_Cienfuegos_province, title = {The multivariate statistics applied to the characterization of backyard poultry production in Cienfuegos province}, author = {Casanovas Cos?o, E. and Bernal, Yamilka and Lon Wo, Esmeralda}, journal = {Cuban Journal of Agricultural Science}, volume = {47}, number = {4}, pages = {}, year = {2014-01-28}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs379}, cu_id = {https://cu-id.com/1996/ojs379}, abstract = {The multifactorial characterization of the backyard poultry production systems was conducted in the eight municipalities of Cienfuegos province. One hundred seventy five rearing backyards randomly selected were used, for a reliability of 95 %, proportionally distributed in each municipality. In a transversal observational design with surveys, 17 social, 32 husbandry and 27 epizootiolocal variables were identified. The people inquired are described with an average age of 45 years, male sex predominating (62.90 %) and finished high education (66.9 %). Four husbandry components and five epizootiological ones characterizing the backyard poultry production in Cienfuegos province were identified, with variance explained from 72.90 and 67.22 %, respectively. The components of higher variability for the husbandry and epizootiological were: elements of the productivity, feeding oportunities, bioprotection and ectoparasitosis that explained 50.6 and 40.5% of the total variances. The indicators created: husbandry and epizootiological capacity showed low performance, without differences between the municipalities. Considering the methodology used and the results for strategies in the development of alternative of backyard poultry activity is recommended.Key words: backyard poultry rearing, alternative, principal components, epizootiology, husbandry.}, }
Cu-ID: https://cu-id.com/1996/ojs292 Redirecciones: 37 URL: https://cjascience.com/index.php/CJAS/article/view/292 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/292 BibTeX: @article{Identification_of_fructans_in_Agave_fourcroydes_(henequ?n)_as_source_of_additive_in_animal_production_in_Cuba, title = {Identification of fructans in Agave fourcroydes (henequ?n) as source of additive in animal production in Cuba}, author = {Garc?a Curbelo, Yanelys and L?pez, Mercedes G. and Bocourt, Ram?n}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2013-07-18}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs292}, cu_id = {https://cu-id.com/1996/ojs292}, abstract = {The presence of fructans was determined in Agave fourcroydes in Cuba through the use of infrared spectroscopy with Fourier transformation in the mid-infrared area. Lyophilized samples of carbohydrates extracted from stems and leaves of Agave fourcroydes were used. In all instances, there was identification of fructans. In the infrared spectra, there were bands of strong absorption at 3400-3200 cm-1, typical of OH bonds, as well as bands of absorption of carbon groups at 1900-1580 cm-1, bonds between ?C-O-C- monomers at 1150-1050 cm-1, cyclic alcohol at 1065-1015 cm-1 and C-O-C, due to the presence of oxygen in asymmetric rings at 950-890 cm-1. The elucidation of these molecular structures is of great relevance in the future work developed in Cuba with these crops, specifically to assess the physiological function in the plant and as source of obtainment of prebiotic products.Key words: fructans, Agave fourcroydes, infrared spectroscopy.}, }
