Cu-ID: https://cu-id.com/1996/ojs978 Redirecciones: 43 URL: https://cjascience.com/index.php/CJAS/article/view/978 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/978 BibTeX: @article{Implementation_of_agroecological_indicators_for_environmental_diagnosis_in_a_livestock_productive_facility_from_the_southeast_of_Buenos_Aires,_Argentina, title = {Implementation of agroecological indicators for environmental diagnosis in a livestock productive facility from the southeast of Buenos Aires, Argentina}, author = {Larsen, Brenda A. and Kristensen, María J. and Confalone, Adriana E.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs978}, cu_id = {https://cu-id.com/1996/ojs978}, abstract = {An environmental diagnosis of a livestock facility that raises reproductive cattle in the southeast of Buenos Aires was carried out, during a productive year, to evaluate the effects of agricultural practices and deepen the analysis of wild species diversity. The model designed for the AgroEcoindex® Pampas region was applied, which uses 19 indicators related to energy, nutrients, pollution and erosion, water and intervention. Wild species on the area were listed. Energy indicators showed a critical demand for fossil energy. Consumption was 13 times superior to the negative threshold of the model. Production reached the optimal threshold, but was inefficient. It required five units of energy per unit of generated product. C reserve in soil was reduced, greenhouse gas balance exceeded the negative threshold, as well as the impact on habitat and water intake. Risk of pesticide contamination was critical. There were favorable trends: N and P balance, with an annual increase that was 20 times superior to the threshold, without generating contamination risks, efficiency of water use, rain/ produced energy ratio, erosion risk, habitat intervention and agro-diversity. A richness of 81 plants and 75 animals was registered, not evaluated by the model.}, }
Cu-ID: https://cu-id.com/1996/ojs977 Redirecciones: 34 URL: https://cjascience.com/index.php/CJAS/article/view/977 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/977 BibTeX: @article{In_vivo_digestibility_of_nutrients_and_energy_of_moringa_(Moringa_oleifera_ecotype_Pernambuco)_forage_meal,_for_growing-fattening_rabbits, title = {In vivo digestibility of nutrients and energy of moringa (Moringa oleifera ecotype Pernambuco) forage meal, for growing-fattening rabbits}, author = {Caro, Y. and Bôa-Viagem, C. and Ferreira, W.M. and Bustamante, Daymara and Ly., J. and Mireles, S.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs977}, cu_id = {https://cu-id.com/1996/ojs977}, abstract = {Thirty-two White New Zealand rabbits, at 55 days of age, wereused to estimate in vivo digestibility of nutrients in moringa foragemeal. Eight animals were randomly distributed in each of thefour experimental groups: 0, 100, 200 and 300 g/kg of moringaforage meal. Apparent fecal digestibility of dry matter, organicmatter, crude protein, crude energy, neutral detergent fiber andacid detergent fiber was determined. The other evaluated indicatorwas total content of digestible nutrients (protein and energy). Feedintake was reduced (P> 0.05) in rabbits consuming diets withmoringa forage meal. There were no differences in apparent fecaldigestibility of nutrients among treatments. Digestible energy:digestible protein relationship increased in rabbits fed with themoringa forage meal in 11.66; 11.19 and 10.95 g/MJ, with respectto control diet. The results demonstrated the nutritional potentialof moringa forage meal, when up to 30% is used in rabbit feeding.}, }
Cu-ID: https://cu-id.com/1996/ojs976 Redirecciones: 50 URL: https://cjascience.com/index.php/CJAS/article/view/976 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/976 BibTeX: @article{Chemical_composition,_secondary_and_primary_metabolites_of_Tithonia_diversifolia_related_to_climate, title = {Chemical composition, secondary and primary metabolites of Tithonia diversifolia related to climate}, author = {Herrera, R.S. and Verdecia, D.M. and Ramírez, J.L.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs976}, cu_id = {https://cu-id.com/1996/ojs976}, abstract = {To establish the relationship between chemical composition,secondary metabolites, primary metabolites and digestibility oforganic matter, dry matter, protein, NDF and ADF of Tithoniadiversifolia and climatic factors, the correlation study was carried out.The indicators were: A) chemical composition: ADF, NDF, lignin,cellulose, hemicellulose, cellular content, OM, ash, N, Si, Ca, P andMg; B) secondary metabolites: total tannins, total phenols, totalcondensed tannins, fiber-bound condensed tannins, free condensedtannins, alkaloids, saponins, triterpenes, steroids and flavonoids, andC) primary metabolites: glucose, fructose, sucrose, N, verbascose,stachyose and raffinose. Correlation coefficients (r) between climaticfactors and chemical composition were variable and the highestvalues were obtained for cellulose, total rainfall and number of dayswith rain (-0.69 and -0.73, respectively). For secondary metabolites,total condensed tannins and free condensed tannins stood out withtemperatures and indicators of rain (values of r between 0.62 and0.85) and for the primary metabolites, verbascose and stachyose werebetter with temperatures (r higher than 0.78). In vitro digestibilityof DM correlated (r between -0.63 and -0.91) with temperatures,rainfall and their distribution. Similar performance was registeredfor digestibility of organic matter and the r varied between -0.69and -0.90. Digestibilities of CP, ADF and NDF only correlated withrainfall and their distribution (r between -0.74 and -0.87). Datashowed the specific and variable effect of climate elements in thestudied indicators, which is useful for the efficient management ofthis plant under climate change conditions. It is recommended toconsider these results to counteract the negative effect that secondarymetabolites of Tithonia diversifolia can cause in ruminant feedingsystems, apply mathematical modeling to predict the performanceof these substances with climatic factors and other aspects of thisplant management, as well as extend this type of research to otherplants of interest to livestock.}, }
Cu-ID: https://cu-id.com/1996/ojs975 Redirecciones: 34 URL: https://cjascience.com/index.php/CJAS/article/view/975 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/975 BibTeX: @article{Growth_curve_of_broiler_chicken_submitted_the_cassava_meal_diet, title = {Growth curve of broiler chicken submitted the cassava meal diet}, author = {L. R. R., Lucena and M. A. C., Holanda and M. C. R., Holanda}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs975}, cu_id = {https://cu-id.com/1996/ojs975}, abstract = {Achieve success in broiler chickens creation is necessary to providea diet rich in essential nutrients to maximize poultry performance.In this context, cassava stands out, source rich in carbohydratesand can provide great weight gain and decrease the cost ofproduction. Current success in genetic improvement in birds hascaused changes in the growth curve, however the objective was tomodel the weight growth of broiler chickens fed diets containingcassava. A total of 450 male broiler chickens of Cobb lineage wereused. The experimental design was completely randomized withfive treatments (0, 25, 50, 75 and 100% inclusion of cassava meal)and five repetitions, each experimental unit was composed of 18birds. To evaluate the weight performance according to age and theinclusion of cassava in the animals’ diet, adjustments of regressionmodels were proposed. Power, hyperbolic tangent and gammamodels presented the best results for estimating broiler chickensweight. Power model was the most adequate for estimating theweight of broiler chickens as it presents the best criteria (R²=99.7%;SSR=0.09 and AIC=-82.34). The adoption of the power modelprovides information on the best level of inclusion of cassavameal (100%) and the best time for slaughtering (42 days) birdsmaximizing the weight in 3,295 g.}, }
Cu-ID: https://cu-id.com/1996/ojs967 Redirecciones: 36 URL: https://cjascience.com/index.php/CJAS/article/view/967 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/967 BibTeX: @article{Yield_and_bromatological_composition_of_three_Brachiaria_varities_in_two_areas_of_Ecuador, title = {Yield and bromatological composition of three Brachiaria varities in two areas of Ecuador}, author = {Reyes Pérez, J.J. and Méndez Martínez, Y. and Luna Murillo, R. A. and Verdecía, D. M. and Espinoza Coronel, A. L. and Pincay Ronquillo, W.J. and Espinosa Cunuhay, K.A. and Macías Pettao, R. K and Herrera, R.S.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs967}, cu_id = {https://cu-id.com/1996/ojs967}, abstract = {Using a random block design with factorial arrangement (3x2) theeffect of the climatic area (Guayas and El Empalme) in the yieldcomponents and bromatological composition of three Brachiariavarieties (Decumbens, Brizantha and Mulato I) was studied. Theyields of total dry matter, biomass, leaves and stems, the plantheight, length and width of leaves, the contents of DM, CP, NDF,ADF, ADL, cellulose (Cel), hemicellulose (Hcel), cellular content(CC), P, Ca, ash, OM, DMD, OMD, ME, NFE and relationsleaf/stem, NDF/N and ADF/N were determined. Analysis ofvariance was performed according to experimental design. Therewas significant interaction (P <0.0001) between the varieties andthe area for some of the studied indicators. The highest yields oftotal DM, leaves, stems and biomass were obtained in Mulato I inEl Empalme (1.32, 0.79, 0.53 and 5.08 t/ha, respectively P<0.001).The CP was better in Mulato I in Guayas (13.08 %, P<0.001), thecell wall components did not showed variety x area interaction,with significant differences in terms of the varieties for NDF, CELand CC with the highest results for cv. Decumbens and Mulato I(38.21, 17.26 and 64.22 %, respectively P< 0.05). While for thearea the highest percentages of ADF and ADL (20.12 and 3.47 %,respectively P< 0.02) were for Guayas. In this research was showedthe effect of the climate factors and the variety on the yields andsome quality indicators were the best productive and morphologicalperformance in the higher rains area (El Empalme) was obtained,while for the content of protein, minerals, ash, the relationsleaf/ stem and NDF/N was better for the one of lower rains (Guayas).It is important to highlight that there were not differences betweenthe varieties for the cell wall components, ADF/N, digestibility andenergy contribution that is why their adaptability and potentialitiesin different ecosystems is confirmed.}, }
Cu-ID: https://cu-id.com/1996/ojs966 Redirecciones: 29 URL: https://cjascience.com/index.php/CJAS/article/view/966 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/966 BibTeX: @article{Spatial_mite_population_distribution_on_Caryocar_brasiliense_trees._Technical_note, title = {Spatial mite population distribution on Caryocar brasiliense trees. Technical note}, author = {Leite, G.L.D. and Lazo, J. A. and Veloso, R.V.S. and Matioli, A.L. and Almeida, Ch.I.M. and Soares, M. A. and Lemes, P. G.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {3}, pages = {}, year = {2020-07-08}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs966}, cu_id = {https://cu-id.com/1996/ojs966}, abstract = {The objective was to study the spatial distribution of the mitepopulation in the pequi trees (Caryocar brasiliense). A completelyrandomized design was used and evaluated the spatial distributionof mites according to the orientation of the branches; part of thecanopy; part of the leaf and foliar surface. The part of canopyof the tree and the orientation of the branches did not influencethe mite population in leaves and fruits. The largest amount ofHistiostoma sp. was observed in the proximal part of the leaf. Thesurface of the leaf determined the presence of mites and a greaternumber of Agistemus sp., EuTetranychus sp., Tetranychus sp.1and 2, Histiostoma sp. and Proctolaelaps sp. was observed on theabaxial surface. It is recommended as a preliminary plan for thesampling of mites in plantations of C. brasiliense to use the leavesof all parts of the tree.}, }
Cu-ID: https://cu-id.com/1996/ojs959 Redirecciones: 31 URL: https://cjascience.com/index.php/CJAS/article/view/959 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/959 BibTeX: @article{Effect_of_different_dehydration_methods_on_physicochemical_properties_of_Roystonea_regia_nuts, title = {Effect of different dehydration methods on physicochemical properties of Roystonea regia nuts}, author = {Pérez, O. and Martínez, Madeleidy and Díaz, Laisury and Sarduy, Lucía and Ayala, Lázara}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {2}, pages = {}, year = {2020-05-04}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs959}, cu_id = {https://cu-id.com/1996/ojs959}, abstract = {To study the effect of different dehydration methods on physicochemical properties of Roystonea regia nuts (royal palm nuts), three treatments were established, consisting of three methods for drying seeds: in an oven at 45 ºC, open air and in a solar dryer. The fresh sample constituted the control. Physical properties like sphericity, weight of 1,000 nuts, apparent and real density, as well as porosity, were studied. The content of dry matter, ash, crude protein, ether extract and fiber fractionation were determined. For the variables weight loss and bed temperature, the mixed generalized linear model was used, with repeated measurements over time. Analysis of variance was applied for analyzing physicochemical properties, according to a completely randomized design. Interaction in temperature (sampling hours x treatment) was observed, and there was no effect on weight loss. This last indicator decreased as drying time increased (0.92, 0.79, 0.64, 0.48 kg for 0, 24, 48 and 72 h, respectively, P <0.0001).There were no differences among treatments for physical properties, but there were differences regarding the fresh sample. However, crude protein, ether extract, acid detergent fiber and lignin varied. Results allowed to conclude that the dehydration method did not influence on weight loss nor on palm nuts properties. However, it was found that, out of the three studied methods, the use of solar dryer favors chemical composition of the grain.Key words: chemical composition, dehydration, royal palm, gravimetric properties}, }
Cu-ID: https://cu-id.com/1996/ojs956 Redirecciones: 103 URL: https://cjascience.com/index.php/CJAS/article/view/956 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/956 BibTeX: @article{Effect_of_climate_area_on_yield_and_quality_of_three_varieties_of_Megathyrsus_maximus, title = {Effect of climate area on yield and quality of three varieties of Megathyrsus maximus}, author = {Méndez, Y. and Reyes, J. J. and Luna, R. A. and Verdecia, D. M. and Espinoza, A. L. and Pincay, W. J. and Espinosa, K. A. and Macías, R. K. and Herrera, R. S.}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {2}, pages = {}, year = {2020-05-04}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs956}, cu_id = {https://cu-id.com/1996/ojs956}, abstract = {The effect of climatic area (Guayas and El Empalme) on quality indicators of three varieties of Megathyrsus maximus (Common, Tanzania and Tobiatá) was studied using a random block design with factorial arrangement (3x2). Yields of total dry matter, biomass, leaves and stems were determined, as well as height of the plant, length and width of leaves. Contents of DM, CP, NDF, ADF, ADL, cellulose (CEL), hemicellulose (HCEL), cellular content (CC), P, Ca, ash, OM, DMD, OMD, ME, NFE and leaf-stem, NDF/N and ADF/N relationships. There was a significant interaction(P <0.0001) between varieties and area, for some of the studied indicators. The highest DM and biomass yields were obtained in Tanzania in El Empalme (2.17 and 6.97 t / ha, respectively, P <0.0001), and those of PB were for Tanzania in Guayas (12.52%, P <0.0001), while cell wall components did not differ among varieties, only ADL was significant for Guayas (3.82 %, P <0.004). The effect of climatic area on yield and quality of forages was demonstrated in the current research, where the best performance of productivity and morphological development was obtained in the area with the highest rainfall (El Empalme), while quality was betterfor that with the lowest rainfall (Guayas). Although there were no differences for leaf growth, cell wall components, digestibility and energy contribution, its adaptability and potential in the different ecosystems are confirmed.Key words: biomass, production, region, chemical composition, digestibility, energy}, }
Cu-ID: https://cu-id.com/1996/ojs947 Redirecciones: 30 URL: https://cjascience.com/index.php/CJAS/article/view/947 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/947 BibTeX: @article{Effect_of_a_dry_fermented_product_on_morphological,_immunological,_histological_and_health_indicators_of_broilers, title = {Effect of a dry fermented product on morphological, immunological, histological and health indicators of broilers}, author = {Savón, Lourdes and Sánchez, B. and Elías, A. and Ortega, H. J. and Gutiérrez, M. and Scull, Idania and Herrera, Magalys}, journal = {Cuban Journal of Agricultural Science}, volume = {54}, number = {1}, pages = {}, year = {2020-02-07}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs947}, cu_id = {https://cu-id.com/1996/ojs947}, abstract = {To determine the effect of the inclusion of a dry fermented product, prepared from ruminal content, on the morphological, immunological, health and histological indicators of broilers, 32 EB24 hybrid male animals, with 42 days of age, were used. Broilers were distributed according to a completely randomized design with eight repetitions per treatment: control of corn/soybean and three experimental diets including 1, 2 and 3 % of the dry fermented product. Morphological indicators (relative weights, g/gLW x 100) of digestive organs, accessory organs of the gastrointestinal tract (GIT) were determined, as well as other immunological (spleen, thymus and bursa of Fabricius) and histological indicators. Health indicators (hematocrit) and serum concentrations of total proteins, uric acid, cholesterol, triglycerides and glucose were also analyzed. The dry fermented product did not alter the relative weights of organs of full and empty gastrointestinal tract, nor that of accessory organs and lymphoids. There was increase of relative weight of spleen (P=0.0693), which corresponded with an increase in hematocrit, in broilers that received up to 3% of the dry fermented product. Protein metabolism indicators did not vary with the inclusion of the dry fermented product, which influenced on energy metabolism, with an increase of 6.85 vs. 9.52 and 10.21 of serum glucose (P<0.0091 mmol/L) for 2 and 3 % of dry fermented product, with a decrease of 0.84 vs. 0.52 and 0.54 (P<0.0032 mmol/L) of triglycerides regarding the control. An elongation of villi of the small intestine mucus and a hyperplasia of cecal tonsils was observed, which could indicatebetter nutrient absorption and possible immunostimulatory effect. Results suggest that the inclusion of up to 3 % of the dry fermented product in the diet of broilers based on corn/soybean, favors health and histological indicators of these animals.Keywords: fermentation, ruminal content, lymphoid organs, histology, broilers}, }
Cu-ID: https://cu-id.com/1996/ojs929 Redirecciones: 53 URL: https://cjascience.com/index.php/CJAS/article/view/929 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/929 BibTeX: @article{Nutritional_characterization_of_biofloc_developed_with_water_from_the_Ecuadorian_Pacific_for_growing_Litopenaeus_vannamei, title = {Nutritional characterization of biofloc developed with water from the Ecuadorian Pacific for growing Litopenaeus vannamei}, author = {Ibarra, E. and Llanes, J. E. and Rodríguez, Bárbara}, journal = {Cuban Journal of Agricultural Science}, volume = {53}, number = {4}, pages = {}, year = {2019-12-05}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs929}, cu_id = {https://cu-id.com/1996/ojs929}, abstract = {The objective of this study was to determine the bromatological and amino acid composition of biofloc generated in the macrocosm tank for growing Litopenaeus vannamei with water from the Ecuadorian Pacific. Thalassisira sp. microalgae was inoculated to form the macrocosm (1.4 x 106 mL/L) and 40 shrimp/m2 with an average weight of 12.7 ± 1.2 g were placed, as well as commercial food with 35 % protein. To guarantee bacterial growth, a C:N ratio of 20:1 was maintained through the contribution of sugar cane molasses and nitrogen from the feed. The biofloc showed high protein levels (36.53 %), low lipid contribution (0.97 %) and high ash values(33.39 %). There was presence of all amino acids, the highest levels were found for leucine, arginine, valine, threonine and phenylalanine. In contrast, tryptophan was the one with the lowest concentration and the lowest chemical score (0.56), resulting in the first limiting amino acid. Likewise, the isoleucine (0.70) and lysine (0.80) scores indicated that they were limiting amino acids of the biofloc that was produced. The index of biofloc essential amino acids was 0.89, which classifies as useful protein material. This study allows to conclude that the biofloc generated with Ecuadorian Pacific water presented an adequate protein quality, in terms of its amino acid composition, chemical score and essential amino acid index, so it can serve as a supplement to the balanced food for growing shrimp with biofloc technology.Keywords: flocs, white shrimp, amino acids, bromatological composition}, }
