Cu-ID: https://cu-id.com/1996/ojs281 Redirecciones: 51 URL: https://cjascience.com/index.php/CJAS/article/view/281 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/281 BibTeX: @article{Sensitivity_analysis_of_1996_National_Research_Council_model_for_supplemented_grazing_beef_cattle, title = {Sensitivity analysis of 1996 National Research Council model for supplemented grazing beef cattle}, author = {Ortega, C. G. and Hern?ndez, O. and Vargas, L. and Mendoza, G. D. and Mart?nez, P. A. and Avenda?o, L.}, 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/ojs281}, cu_id = {https://cu-id.com/1996/ojs281}, abstract = {The National Research Council (NRC) published in 1996 the Seventh Edition of the Nutrient Requirement of Beef Cattle (NRC 1996), which includes a software to evaluate diets. However, it is unknown the sensitivity of its outputs according to the changing values of its inputs. This is particularly important during the evaluation of the software performance in the presence of new scenarios. In order to evaluate this, an analysis of sensitivity was performed using the one at a time and multi-way procedures. The results showed inconsistencies between the values from the sensitivity in the level one (L1) and the level two (L2) of the software. The inputs that had higher response to the change in the prediction of daily weight gain (DWG) in the L1, compared to the L2, were herbage intake, enriched sugar cane intake, supplement intake, initial body weight, mature weight, and animal breed. The inputs that did not have changes for both levels (L) were age of the animal, heat stress, wind speed, night cooling, hide, hair depth, grazing unit size, days on pasture, and number of animals grazing. It is necessary to carry out evaluations using real data to know the? performance of the software in frequent commercial situations.Key words: NRC software, input sensitivity, Bos taurus, tropical Mexican conditions.}, }
Cu-ID: https://cu-id.com/1996/ojs280 Redirecciones: 42 URL: https://cjascience.com/index.php/CJAS/article/view/280 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/280 BibTeX: @article{Application_of_the_logistical_and_Gompertz_models_to_the_analysis_of_live_weight_curves_in_Cuban_Creole_kids, title = {Application of the logistical and Gompertz models to the analysis of live weight curves in Cuban Creole kids}, author = {La O Arias, M. A. and Guevara, F. and Fonseca, N. and Rodr?guez, L. and Pinto, R. and G?mez, H. and Medina, F. J. and Hern?ndez, A.}, journal = {Cuban Journal of Agricultural Science}, volume = {47}, number = {1}, pages = {}, year = {2013-07-02}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs280}, cu_id = {https://cu-id.com/1996/ojs280}, abstract = {Growth curves in Cuban creole kids were studied adjusted to the logistical and Gompertz models through the application of elasticity calculation and their biological interpretations. The elasticity was calculated by the expression ?= dy/dx . x/y . The range where the adjusted model was elastic (> 1) was considered as growth peak period. From the models the adjusted and potential adult weight, the highest growth rate and the age at which is reached, were estimated. In both models significant values were recorded in the adjustments, with coefficients of determination higher than 98% and the typical error of the estimations, with values between 1371 and 1711 g. The adult adjusted weight was of 36. 522 and 31.354 kg for males and females, respectively, according to the logistical model and in regard to the Gompertz model, corresponded to 40.373 and 34.297 kg for males and females, respectively. The analysis of elasticity of both models were effective to estimate the limits and the duration of the growth peak period, which was extended from 165 to 193 d, and ended between 225 and 260 d of age, when the animals attained live weights around 20 and 26 kg, for females and males, respectively. Daily live weight gains were of 70 g for both sexes at the beginning of? the growth peak and at its end of 93 to 104 g daily, for females and males, respectively.Key words: growth, elasticity, goats, Criollas}, }
Cu-ID: https://cu-id.com/1996/ojs242 Redirecciones: 42 URL: https://cjascience.com/index.php/CJAS/article/view/242 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/242 BibTeX: @article{Studies_on_the_agamic_reproduction_in_Sporobolus_indicus, title = {Studies on the agamic reproduction in Sporobolus indicus}, author = {Febles, Gustavo and Padilla, C?sar and Achan, Geovanis}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {2}, pages = {}, year = {2013-06-19}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs242}, cu_id = {https://cu-id.com/1996/ojs242}, abstract = {An experiment was conducted for two years to know the existence of agamic reproduction in Sporobolus indicus. The analysis of variance was carried out to simple classification model, with six repetitions corresponding to the samplings of each year. The diameter of the bunch, as well as the number of alive and dead tillers, were measured. Each year was divided into four periods: February-April, May-July, August-October and November-January. No significant differences were found in both years during the first three periods. Significant differences (P < 0.05) were found in the number of alive and dead tillers, with a tendency to diminish both. There were no differences in the diameter of the bunch. It is concluded that, in this weed, the agamic reproduction may be considered as an element of accessory dispersion of the gamic reproduction or as a process of slow dissemination, translated into an invasion in a prolonged period of time.Key words: Sporobolus indicus, wiregrass, agamic reproduction}, }
Cu-ID: https://cu-id.com/1996/ojs218 Redirecciones: 35 URL: https://cjascience.com/index.php/CJAS/article/view/218 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/218 BibTeX: @article{Chemical_composition,_degradability,_and_in_vitro_gas_production_of_foliage_from_twelve_sweet_potato_cultivars_(Ipomoea_batatas_Lam), title = {Chemical composition, degradability, and in vitro gas production of foliage from twelve sweet potato cultivars (Ipomoea batatas Lam)}, author = {Ojeda, A. and Matos, A. A. and Cardozo, A. R.}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {3}, pages = {}, year = {2013-06-17}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs218}, cu_id = {https://cu-id.com/1996/ojs218}, abstract = {An experiment was performed to assess the chemical composition, the in vitro degradability of the dry matter at 48 and 96 h (Deg48 andDeg49, respectively), the accumulated gas production at 48 and 96 h (Gas48 and Gas96, respectively), and to estimate the metabolizableenergy (ME) of the foliage of twelve cultivars of sweet potato (Ipomoea batatas Lam). They were identified as Huambanchero, Mariara,Topera, Tucutunemo, DLP2850, FNC765, 15, 21, 44, 45, 60, and 199069.1, and they were cultivated for 120 d in seven blocks, each of12 plots (21.6 m2). There were not differences in the chemical composition (11.5 ? 1.3 % CP, 3.6 ? 0.2 % SE, 40.8 ? 3.2 % NDF,15.1 ? 1.5 % ashes, 1.3 ? 0.3 % Ca, and 0.56 ? 0.1 % P), Gas48 and Gas96 (216.5 ? 8.1 and 281.0 ? 18.5 mL, respectively), fractional rate of gas production (0.06 ? 0.004 mL/h), and phase of delay (2.7 ? 0.24 h). The Mariara cultivar had the highest (P < 0.01) Deg48 and ME(84.8 % and 13.7 MJ/kg MS, respectively), whereas the lowest records corresponded to Huambanchero (72.1 % and 12.7 MJ/kg DM,respectively). The Deg48 had positive correlations (r=0.99, P < 0.01) with Gas96, the fractional rate of gas production, the phase of delay,and the ME. It is concluded that the foliage of sweet potato from the cultivars under study is a fibrous material with chemical composition,parameters of rumen fermentation, in vitro degradability, and ME suggesting its use as alternative resource for the feeding of ruminants in the tropics.Key words: Ipomoea batatas, foliage, metabolizable energy, feeding, ruminants, tropics.}, }
Cu-ID: https://cu-id.com/1996/ojs205 Redirecciones: 52 URL: https://cjascience.com/index.php/CJAS/article/view/205 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/205 BibTeX: @article{Serum_lipid_profile_of_laying_hens_fed_pumpkin_(Cucurbita_maxima)_seed_levels, title = {Serum lipid profile of laying hens fed pumpkin (Cucurbita maxima) seed levels}, author = {Mart?nez, Y. and Valdivi?, Manuel and Estarr?n, Mirna and Solano, G. and C?rdoba, J.}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {4}, pages = {}, year = {2013-05-27}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs205}, cu_id = {https://cu-id.com/1996/ojs205}, abstract = {In order to evaluate the serum lipid profile and the productive performance of laying hens at 45 weeks of age, 160 White Leghorn (L33) laying hens were allotted during 91 d, according to completely randomized design, into four treatments and 20 repetitions, at the time of laying peak. The treatments consisted of diets containing: 0, 3.3, 6.6, and 10 % pumpkin seed meal (PSM) in the feedstuff. The viability, the laying intensity, the mass conversion and the egg weight did not differ significantly between treatments. The concentration of triacylglycerids, total cholesterol, low-density lipoproteins (LDL) and very-low-density lipoproteins (VLDL) disminished in 21.7, 33.7, 16.3, and 55.3 mg/dL, respectively, with 10 % of PSM in the feedstuff, compared to the control. Moreover, the atherogenic index decreased from 3.33 to 2.96 and the high-density lipoproteins (HDL) increased, from 47.46 to 49.92 mg/dL, when including in the feedstuff up to 10 % of PSM. The octadecanoic (C18:0), oleic (C18:1n9), linoleic (C18:2n6), and ?-linolenic (C 18:3n3) acids were increased in 66.79, 21.60, 57.73, and 20.10 mg/dL, respectively; whereas the arachidonic acid (C20:4n6) declined to 6.69 mg/dL, with 10 % of PSM in the feedstuff, compared to the control. It is recommended to use up to10 % of pumpkin seed meal in laying hen diets to substitute plant oil and imported soybean cake, reduce harmful lipids, and increase the essential fatty acids circulating in the blood serum, not harming the productive performance of the hens.Key words: seed, pumpkin, hens, lipids.}, }
Cu-ID: https://cu-id.com/1996/ojs74 Redirecciones: 42 URL: https://cjascience.com/index.php/CJAS/article/view/74 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/74 BibTeX: @article{Statistical_procedures_most_used_in_the_analysis_of_measures_repeated_in_time_in_the_agricultural_sector, title = {Statistical procedures most used in the analysis of measures repeated in time in the agricultural sector}, author = {G?mez, Sarai and Torres, Verena and Garc?a, Yoleisy and Navarro, J. A.}, journal = {Cuban Journal of Agricultural Science}, volume = {46}, number = {1}, pages = {}, year = {2013-04-09}, publisher = {Instituto de Ciencia Animal}, language = {spa}, url = {https://cu-id.com/1996/ojs74}, cu_id = {https://cu-id.com/1996/ojs74}, abstract = {In the agricultural research, situations are presented where it is difficult to use the classical linear models of analysis of variance, because the assumptions of independence, equality of variances and linearity are not fulfilled by making measures repeated in time. This paper had as object to review the statistical procedures used to analyze the designs of measures repeated in time, and determine which analyticalstrategies are more appropriate for each purpose. In this study, three types of traditionally used analyses are described: univariate variance (ANOVA), multivariate variance (MANOVA), and the recent one, the approach of mixed models. At present, it has been agreed that the latter is the most adequate and versatile, because it provides the possibility of examining data with structures of dependence, unbalance, and lack of normality. Besides, it provides a solution to the limitation of the multivariate analysis of variance in respect to the number of individuals and variables. Also, the model of random effects is described, another member of the wide spectrum of the mixed models that is used in numerous studies in the agricultural field. This approach is strengthened by the use of selection criteria of models, due to the estimation of parameters is based on methods of maximum likelihood or restricted maximum likelihood. The Akaike information criterion (AIC) and theBayesian information criterion (BIC) are described, permitting the optimum selection of competing mixed models.Key words: repeated measures, univariate analysis, multivariate analysis, mixed models, information criteria.}, }
Cu-ID: https://cu-id.com/1996/ojs1004 Redirecciones: 38 URL: https://cjascience.com/index.php/CJAS/article/view/1004 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/1004 BibTeX: @article{Letter_to_the_Editor, title = {Letter to the Editor}, author = {Díaz Untoria, José A.}, journal = {Cuban Journal of Agricultural Science}, volume = {55}, number = {1}, pages = {}, year = {2021-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs1004}, cu_id = {https://cu-id.com/1996/ojs1004}, abstract = {Nowadays, every scientific field requires the socialization of information. Joined with this, the national and international visibility of all research in each area of knowledge is necessary, with an adequate way of transmitting it. Scientific journals are a key element to facilitate access to new knowledge and provide society with what is taking place in different spaces and an example of this is the Cuban Journal of Agricultural Science (CJAS).}, }
Cu-ID: https://cu-id.com/1996/ojs591 Redirecciones: 39 URL: https://cjascience.com/index.php/CJAS/article/view/591 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/591 BibTeX: @article{Letter_of_the_Editor, title = {Letter of the Editor}, author = {Herrera, Rafael S.}, journal = {Cuban Journal of Agricultural Science}, volume = {50}, number = {1}, pages = {}, year = {2016-06-03}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs591}, cu_id = {https://cu-id.com/1996/ojs591}, abstract = {The Institute of Animal Science was founded in 1965 with the objective of developing researches on animal production field and favoring the development of Cuban livestock on solid scientific and technical basis.}, }
Cu-ID: https://cu-id.com/1996/ojs590 Redirecciones: 37 URL: https://cjascience.com/index.php/CJAS/article/view/590 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/590 BibTeX: @article{Letter_to_the_editor, title = {Letter to the editor}, author = {Díaz Untoria, José A.}, journal = {Cuban Journal of Agricultural Science}, volume = {50}, number = {1}, pages = {}, year = {2016-06-03}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs590}, cu_id = {https://cu-id.com/1996/ojs590}, abstract = {Organizations, besides having the technological means for generating, synthetizing and transferring knowledge, should have systems that facilitate the flow of this knowledge and the generation of new researches. An example of the previously exposed idea is the Cuban Journal of Agricultural Science, which belongs to the Ministry of Higher Education, accredited by CITMA since 2000 and cited in international databases like EBESCO, Latindex, AGRIS, Redalyc and SCOPUS.}, }
Cu-ID: https://cu-id.com/1996/ojs503 Redirecciones: 36 URL: https://cjascience.com/index.php/CJAS/article/view/503 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/503 BibTeX: @article{Letter_of_the_Editor, title = {Letter of the Editor}, author = {Herrera, Rafael}, journal = {Cuban Journal of Agricultural Science}, volume = {49}, number = {4}, pages = {}, year = {2016-03-30}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs503}, cu_id = {https://cu-id.com/1996/ojs503}, abstract = {From November 16th to 20th, 2015, the 5th International Congress of Tropical Animal Production was held in the Palacio de Convenciones de La Habana, Cuba, within the context of the celebrations for the 50th anniversary of the creation of the Institute of Animal Science.}, }
