Cu-ID: https://cu-id.com/1996/v57e23 Redirecciones: 191 URL: https://cjascience.com/index.php/CJAS/article/view/1125 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1125 BibTeX: @article{Software_to_study_the_speed_and_acceleration_of_growing_and_developing_of_biological_systems_in_the_time_(Pro-Vel-Ac)._Technical_note_, title = {Software to study the speed and acceleration of growing and developing of biological systems in the time (Pro-Vel-Ac). Technical note }, author = {García, Yaneilys and Torres, Mildrey and Medina, Yolaine and Gómez, Sarai and Mejías, A.}, journal = {Cuban Journal of Agricultural Science}, volume = {57}, number = {}, pages = {}, year = {2023-12-18}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v57e23}, cu_id = {https://cu-id.com/1996/v57e23}, abstract = {The design and develop of a software to study the speed and acceleration of growing and developing of biological systems in the time (Pro-Vel-Ac) is showed with the objective of support the researchers performed by the experts in the study of the biological systems evolution. For the implementation of this software, Microsoft Office Excel 2007 was used. The estimation of the speed and acceleration was based on the calculation of the average variation rates. The local maximum and minimum were estimated from the mathematical concepts of the calculation of the critical and inflection points of a function. The software has three sheets: data input, analysis and graphs. It is concluded that Pro-Vel-Ac provides the analysis of data because calculate and illustrate its speed and acceleration without needing a mathematical model. Inform about the estimated time in which the critical points of the growing speed occurs. Also, generate a table that summarizes the characteristics of data, allowing knowing the biological process in study.}, }
Cu-ID: https://cu-id.com/1996/v57e20 Redirecciones: 176 URL: https://cjascience.com/index.php/CJAS/article/view/1099 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1099 BibTeX: @article{Silage_of_agricultural_by-products_for_pigs_feeding._Bibliography_review, title = {Silage of agricultural by-products for pigs feeding. Bibliography review}, author = {Caicedo, W. and Ruiz, María Vanessa and Quilligana, Jissela Estefanía and Aguiar, S.}, journal = {Cuban Journal of Agricultural Science}, volume = {57}, number = {}, pages = {}, year = {2023-10-09}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v57e20}, cu_id = {https://cu-id.com/1996/v57e20}, abstract = {The silages of agricultural wastes constitute a novel technique for the use of these resources for a long time. The silage process is carried out through a controlled fermentation, which guarantees a food of optimum nutritional quality, able to reduce imports of conventional raw matters and minimize the costs of pigs feeding. The beneficial microorganisms developed in this medium help to improve the chemical, microbiological and sensorial characteristics of the fermented raw matter. The pigs which intake fermented by-products have better intestinal health due to the competitive exclusion process of the beneficial microorganisms, with the consistent increase of dry matter intake, weight gain, feed conversion, final weight and carcass quality. For this reason, in the developing countries the technique of the agricultural wastes silage is implemented and are evaluated the chemical characteristics of this food and their effect on microbiological, blood, productive and reproductive indicators of pigs. The objective of this review was to assess the results of the use of agricultural by-products in pigs feeding. Results of the chemical components of the silage, digestibility and productive indicators are showed in pigs from post-weaning, growing and fattening categories. Key words: alternative food, pigs, fermentation, efficient microorganisms, agricultural resources}, }
Cu-ID: https://cu-id.com/1996/v57e22 Redirecciones: 199 URL: https://cjascience.com/index.php/CJAS/article/view/1101 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1101 BibTeX: @article{Scientific_writing_and_referee_professional_training_, title = {Scientific writing and referee professional training }, author = {Argota, G.}, journal = {Cuban Journal of Agricultural Science}, volume = {57}, number = {}, pages = {}, year = {2023-10-16}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v57e22}, cu_id = {https://cu-id.com/1996/v57e22}, abstract = {Several researchers refer the determining function of the scientific writing in the reflexive construction of knowledge (Chun et al. 2022). The scientific writing, as being a complex process because its style and impact of the results (Lu et al. 2019, Chen et al. 2020 and Ante 2022), require clarity and precision in the information, abilities that with frequency are loss when it is not answer to the research question during the writing process (Simón et al. 2020). In consequence, in the scientific field, the feasible, the ethical, the interest, the discoveries and the relevance as criteria to be measure, influence on the decisions of accepting or rejected a paper which is subjected to a checking process for their publication. From this perspective, the referee represents one of the attention centers due to the decision they emit in the publishing process, whose responsibility is to keep the quality and integrity of the scientific literature (Grimaldo et al. 2018 and Libby et al. 2022).}, }
Cu-ID: https://cu-id.com/1996/v56n1e06 Redirecciones: 54 URL: https://cjascience.com/index.php/CJAS/article/view/1042 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1042 BibTeX: @article{Determination_of_typologies_of_sheep_production_systems_in_Ciego_de_Ávila_province, title = {Determination of typologies of sheep production systems in Ciego de Ávila province}, author = {Serrano, J. O. and Martínez Melo, J. and Torres, Verena and Villares, A. and Manuel, F. D. and Fonseca, N. and Lorenzo, J. C.}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e06}, cu_id = {https://cu-id.com/1996/v56n1e06}, abstract = {In order to determine the typologies of sheep production systems in Ciego de Ávila province, the statistical model of impact measuring (SMIM) was applied, which combines the main components analysis with the hierarchical cluster method. An information matrix of 296 sheep farmers was used to define groups of farms. The main component analysis explained 71.83 % of the variability. In component 1, variables related to herd movement were identified and component 2 was associated with land tenure. Component 3 had to do with training and management, and component 4 with the age and farmers experience. Component 5 included the number of workers and technological aspects, and component 6 was related to the presence of trees. Five groups of sheep farmers were obtained: I) medium farmers with land from the private sector, II) small farmers without tendency of lands from the private sector, III) small farmers with land from both sectors, with a predominance of the private, IV) large farmers with land from both sectors and V) small farmers with land from both sectors with predominance of the state. The measured indicators explained the higher variability of sheep breeding in the province, in each region, and at the municipal level, Chambas, for the northern region, Ciego de Ávila, for the central region, and Venezuela for the southern region, were the municipalities with superior social, productive, technological and environmental indicators.Key words: characterization, sheep, classification and multivariate analysis.}, }
Cu-ID: https://cu-id.com/1996/v56n1e05 Redirecciones: 67 URL: https://cjascience.com/index.php/CJAS/article/view/1044 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1044 BibTeX: @article{Effect_of_natural_shade_on_the_grazing_behavior_of_breeding_ewes_from_Pelibuey_breed, title = {Effect of natural shade on the grazing behavior of breeding ewes from Pelibuey breed}, author = {Serrano, J. O. and Martínez Melo, J. and Herrera, Magaly and Villares, A. and Manuel, F. D. and Fonseca, N. and Lorenzo, J. C.}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e05}, cu_id = {https://cu-id.com/1996/v56n1e05}, abstract = {A total of twenty-four breeding ewes from Pelibuey breed were used, divided into two treatments of 12 animals each, to determine the effect of natural shade on the behavior of these animals during grazing. In treatment one, they grazed in the system with natural shade and in treatment two, without shade. Each treatment included the three physiological states: non-pregnant cow, pregnant and lactating. Both groups grazed in two paddocks of natural grasses, of 1.3 ha: one without natural shade, and another with shade from the trees Casuarina equisetifolia (casuarina) and Samanea saman (carob tree).The grazing performance was recorded. Every 10 min., observations during six hours of grazing per day were recorded. Contingency table analysis was used to test the interaction between activities and system type, with and without shade, between activities and day session, and between activities and season for each system, with trees and without them. With the analysis of comparison of proportions (chi square), the time percentages were compared. There was interaction between the activities and the characteristics of the farms, with and without trees, and between the activities and the day session. The animals that had access to the shade of the trees spent more time grazing-walking. When they grazed with trees, they selected activities in the shade, such as rest and rumination. A higher proportion of grazing time was recorded during the morning session. In the system with trees, the highest proportions of grazing time were obtained in both seasons.Key words: grazing, trees, animal behavior, silvopastoral system}, }
Cu-ID: https://cu-id.com/1996/v56n1e04 Redirecciones: 68 URL: https://cjascience.com/index.php/CJAS/article/view/1040 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1040 BibTeX: @article{Evaluation_of_non-linear_and_mixed_non-linear_models_to_describe_in_vitro_gas_production_kinetics_of_ruminant_feeds, title = {Evaluation of non-linear and mixed non-linear models to describe in vitro gas production kinetics of ruminant feeds}, author = {García Avila, Yaneilys and Herrera, Magaly and Rodríguez, R. and Ontivero, Yadiana}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e04}, cu_id = {https://cu-id.com/1996/v56n1e04}, abstract = {The performance of non-linear and mixed non-linear models was evaluated in the description of in vitro gas production kinetics of ruminant feeds. For this, the logistic, Gompertz and Groot models were used. The analyzes included the addition of random effects to the asymptotic parameter of each model, since this parameter was the one that varied the most among the incubation bottles. Each random effect was associated with a probable source of variability in the experiment. The parameters were estimated with the NLMIXED proc of SAS program. For the selection of the best fit model, the R2aj, σ2, AIC and BIC were considered. In addition, compliance with the basic assumptions for the residuals and the relationship among mathematical fit, simplicity and biological interpretation of the parameters were assessed. It is concluded that the non-linear mixed models allowed to obtain better R2aj, BIC and σ2. The random effects had no significant effect on the fulfillment of the assumptions of autocorrelation and randomness of residuals. The random effect bottle over time allowed to determine the times in which there was a lack of fit. Despite the limitations of the analyzed models, the logistic, without the inclusion of the random effect, was the most appropriate according to the parsimony criterion.Keywords: mathematical modeling, random effect, goodness of fit, parsimony, fermentation}, }
Cu-ID: https://cu-id.com/1996/v56n1e03 Redirecciones: 55 URL: https://cjascience.com/index.php/CJAS/article/view/1039 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1039 BibTeX: @article{Effect_of_three_collections_of_Tithonia_diversifolia_on_the_ruminal_microbial_population_of_cattle, title = {Effect of three collections of Tithonia diversifolia on the ruminal microbial population of cattle}, author = {Galindo, Juana and González, Niurca and Ruíz, T. and Herrera, Magaly and Moreira, Onidia and Capó, Aned and Díaz, Humberto}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-02-09}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e03}, cu_id = {https://cu-id.com/1996/v56n1e03}, abstract = {In order to determine the effect of three collections of Tithonia diversifolia (mv-12, mv-14 and mv-17), collected in the eastern region of Cuba, on the ruminal microbial population of cattle, an experiment under in vitro conditions was developed. The control treatments with Cynodon nlemfuensis (star grass) were compared: star grass + mv-12; star grass + mv-14 and star grass + mv-17. The three collections were included at a rate of 20 % of the dry matter. The crude protein content was 19-23 % of the dry matter. With the materials mv-14 and mv-17 higher populations of cellulolytic bacteria were obtained, at three and six hours after starting fermentation with respect to that obtained with star grass. The three collections doubled the population of proteolytic bacteria three hours after starting fermentation, while at six hours only mv-12 produced effects in this bacterial group. The methane values were 37.4, 32.6, 33.2 and 32.33 g/kg of digested organic matter for the control, and the treatments mv-12, mv-14 and mv-17, respectively. Although they did not differ between plant materials, mv-12, mv-14 and mv-17 produced less methane than the star grass treatment only (P = 0.0477). It is concluded that the treatments mv-12, mv-14 and mv-17 caused modifications in the ruminal ecosystem, by increasing the population of total cellulolytic organisms and proteolytic bacteria; in addition to reducing the protozoan population. The methane estimated from crude protein concentration also decreased.Key words: cellulolytic bacteria, proteolytic, methane, SCFAs, protozoa}, }
Cu-ID: https://cu-id.com/1996/v56n1e02 Redirecciones: 58 URL: https://cjascience.com/index.php/CJAS/article/view/1041 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1041 BibTeX: @article{Effect_of_the_inclusion_of_L-carnitine_on_egg_quality_and_productivity_of_Hy-Line_Brown®_laying_hens, title = {Effect of the inclusion of L-carnitine on egg quality and productivity of Hy-Line Brown® laying hens}, author = {Zelaya, R. L. and Rios, J. J. and Paz, P. and López, S. and Valdiivié, M. and Martínez, Y.}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e02}, cu_id = {https://cu-id.com/1996/v56n1e02}, abstract = {To evaluate the effect of the inclusion of L-carnitine on productivity and egg quality of laying hens, a total of 200 Hy-Line Brown® hens of 85 weeks old were randomly distributed into two treatments, with 20 repetitions/treatment and five hens/repetition for 10 experimental weeks. Dietary treatments consisted of a control diet and the inclusion of 24 mg/kg of L-carnitine. The inclusion of L-carnitine did not change (P> 0.05) laying intensity, food intake, mass conversion and percentage of dirty eggs. However, this experimental treatment (L-carnitine) increased egg weight (63.35 vs. 65.68 g) in relation to control diet (P <0.05). In addition, the inclusion of L-carnitine did not modify (P> 0.05) albumen height, Haugh unit, eggshell strength and yolk color at week 90. However, L-carnitine increased (P <0.05) eggshell thickness with respect to control treatment. At week 95, L-carnitine did not modify (P> 0.05) any indicator of egg external and internal quality. The inclusion of L-carnitine in diets for Hy-Line Brown® laying hens increases egg weight and eggshell thickness at week 90, without significant changes in the other egg quality and productive indicators at week 95 of age.Key words: 3-hydroxy-4-trimethylaminobutyrate, additive, productive indicator, egg modifications, brown layers}, }
Cu-ID: https://cu-id.com/1996/v56n1e01 Redirecciones: 61 URL: https://cjascience.com/index.php/CJAS/article/view/1038 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1038 BibTeX: @article{Effect_of_dry_fermented_rumen_liquor_on_productive_indicators_of_replacement_White_Leghorn_laying_hens, title = {Effect of dry fermented rumen liquor on productive indicators of replacement White Leghorn laying hens}, author = {Rodríguez, Bárbara and Savón, Lourdes and Elías, A. and Herrera, Magaly}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {1}, pages = {}, year = {2022-02-09}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n1e01}, cu_id = {https://cu-id.com/1996/v56n1e01}, abstract = {A total of 840 animals, from 1 to 126 days of age, randomly distributed into four experimental treatments, were used for evaluating the effect of including 0, 1, 2 and 3 % of dry fermented ruminal liquor in the diet on productive performance. Viability of hens was higher than 96 %, which shows that these treatments had no negative effects on health. Feed intake was not affected by the product. However, at 84 d, feed conversion (P=0.0003) and liveweight (P=0.0008) improved with respect to the group in which it was not included. From day 1 to 126, only differences were found between the 2% treatment and the untreated group for feed conversion (4.51 vs. 4.76, P=0.0245) and liveweight (1419 vs. 1349, P=0.0360). Mean liveweight of the batch, in each stage, had a coefficient of variation lower than 8, which corresponds to a uniformity superior to 90%, which indicates that it was good. No effect of treatment on ovary and oviduct development was found. Dry fermented ruminal liquor improved liveweight and feed conversion of replacement layers with high viability and uniformity. Results suggest the use of this product up to 3% in the diet of this poultry category.Keywords: poultry, rumen content, fermentation, additive}, }
Cu-ID: https://cu-id.com/1996/v56n2e05 Redirecciones: 143 URL: https://cjascience.com/index.php/CJAS/article/view/1049 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1049 BibTeX: @article{Evaluation_of_Cenchrus_purpureus_varieties_tolerant_to_drought_in_the_western_region_of_Cuba, title = {Evaluation of Cenchrus purpureus varieties tolerant to drought in the western region of Cuba}, author = {Herrera, R. S.}, journal = {Cuban Journal of Agricultural Science}, volume = {56}, number = {2}, pages = {}, year = {2022-06-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/v56n2e05}, cu_id = {https://cu-id.com/1996/v56n2e05}, abstract = {A three-year experiment was carried out to evaluate the agronomic performance of new varieties of Cenchrus purpureus (CT-600, CT-601, CT-602, CT-603, CT-605, CT-607, CT-608 and CT -609), tolerant to drought, obtained by in vitro tissue culture, and compared with its parent (CT-115) through a completely random design with five replications. There were significant differences between the height of the varieties and in both seasonal periods CT-605 stood out with values higher (P<0.05) at 90 cm. The leaves content (%) was only significantly different between the varieties in the dry season during the experimental stage, while the percentage of stems showed a similar response pattern. There were varieties that exceeded the DM yield of the control and especially the CT-605 with values of 21.82, 16.37 and 9.05 t DM/ha/year for the first, second and third year, respectively. With the exception of the first year, the varieties did not express their potential for biomass production under water stress conditions and future researches are suggested where rainfalls is less than 800 mm, as well as studying the effect of strategic fertilization on regimes of greater rainfall.Key words: water stress, tolerance, yields, population}, }
