Cu-ID: https://cu-id.com/1996/ojs229 Redirecciones: 29 URL: https://cjascience.com/index.php/CJAS/article/view/229 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/229 BibTeX: @article{Estimation_of_genetic_parameters_for_milk_yield_in_different_lactations_of_Mambi_de_Cuba_cows, title = {Estimation of genetic parameters for milk yield in different lactations of Mambi de Cuba cows}, author = {Hern?ndez, Arelys and Ponce de Le?n, Raquel and Guerra, D. and Garc?a, Sonia M.}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {2}, pages = {}, year = {2010-06-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs229}, cu_id = {https://cu-id.com/1996/ojs229}, abstract = {The records of 25 036 milk yields accumulated up to 305 d (13 495 of first lactation (L1), 6 067 of second (L2), 3 445 of third (L3) and2 029 of fourth (L4) were used. They were from 13 495 Mambi de Cuba cows (3/4 Holstein 1/4 Zebu) that calved between 1981 and 2006.The cows were spread in 173 herds of four cattle enterprises. The objective of this study was estimating the heritabilities and geneticcorrelations between the four first lactations (L1-L4) and determining if the first lactation could be considered as criterion of selection of cowsand sires of this breed. The software REMLF90 was used for estimating the covariance components and the genetic parameters through multivariate animal model including the group of contemporaries (herd-year-four month period of calving as fixed effect, the calving age aslinear and quadratic covariable, and the animal and error as random effects. The averages for L1 until L4 were of 1 957, 2 086, 2099, and 2 106 kg, and the values of heritability were of 0.22 ? 0.03, 0.17 ? 0.04, 0.22 ? 0.05, and 0.26 ? 0.06, respectively. The genetic correlations between the four first lactations were high, with values between 0.76 and 0.95. It was concluded that it is possible to obtain genetic improvements through selection by milk yield, and that there was high percentage of common genes affecting the different lactations. It was determined that the milk yield in the first lactation is a good indicator of the productive performance of the Mambi de Cuba cows and that it may be used as selection criterion.Key words: Mambi de Cuba cows, genetic parameters, milk yield.}, }
Cu-ID: https://cu-id.com/1996/ojs228 Redirecciones: 34 URL: https://cjascience.com/index.php/CJAS/article/view/228 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/228 BibTeX: @article{Distiller?s_dried_grains,_a_viable_alternative_for_cattle_milk_production._Characteristics,_composition_and_use, title = {Distiller?s dried grains, a viable alternative for cattle milk production. Characteristics, composition and use}, author = {Herrera, Javier and Jord?n, Humberto}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {2}, pages = {}, year = {2010-06-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs228}, cu_id = {https://cu-id.com/1996/ojs228}, abstract = {Information is provided about the characteristics, composition, and use of distiller?s dried grains with solubles (DDGS) and their composition for cattle milk production. Several hampers should be solved to expand the markets of distiller?s dried grains with solubles (DDGS). It is fundamental that corn producers, ethanol, cattle, poultry, and balanced feed industries work together to solve matter related to the variability of the product, the absence of standardized sampling methods, the transportation, and the knowledge of the advantages and limitations of DDGS. Distiller?s dried grains used in the feeding of dairy cows are a good source of protein, fat, phosphorus, and energy.Key words: distiller?s grains, dairy cows, milk yield.}, }
Cu-ID: https://cu-id.com/1996/ojs296 Redirecciones: 28 URL: https://cjascience.com/index.php/CJAS/article/view/296 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/296 BibTeX: @article{Biodiversity_characteristics_and_its_measurement_in_Koseilyas_pasture_of_Trakya_(Thrace)_region,_Turkey, title = {Biodiversity characteristics and its measurement in Koseilyas pasture of Trakya (Thrace) region, Turkey}, author = {Tuna, Canan}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs296}, cu_id = {https://cu-id.com/1996/ojs296}, abstract = {This research was conducted in Koseilyas village natural pasture in Tekirdag province at Trakya (Thrace) region in Turkey. Quantitative analyses on species diversity were conducted, as well as phytogeographical analyses. Some ecological indicators were investigated such as life forms, families, phytogeographical regions, life span and frequency. The plants were distributed according to life form into hemicrytophytes, therophytes, cryptophytes, and geophytes, being 37.00, 55.50, 5.50, and 1.80 % of the vegetation. Families were determined to be 40.00 % Fabaceae, 32.00 % Poaceae, and 9.20 % Asteraceae, and other families 18.80 %. Among the analysed species, 18.10 % are Mediterranean, 7.20 % are Euro-Siberian, and 74.70 % are multi-regional or species whose phytogeographical regions are unknown. In terms of life-span, annual, perennial, and biannual represented 52.70, 43.70 and 3.60 % of the vegetation.? Understanding the biological diversity of natural pastures can lead to improvement of pastures and their optimal use. Pasture management strategies change based on species compositions; and, therefore, this information should be available to select the best management strategy.Key words: natural pasture, life form, pytogeographic region}, }
Cu-ID: https://cu-id.com/1996/ojs295 Redirecciones: 36 URL: https://cjascience.com/index.php/CJAS/article/view/295 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/295 BibTeX: Error al realizar la solicitud OAI.
Cu-ID: https://cu-id.com/1996/ojs294 Redirecciones: 35 URL: https://cjascience.com/index.php/CJAS/article/view/294 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/294 BibTeX: @article{Yield_of_dry_matter_and_nutritive_quality_of_the_pasture_Brachiaria_brizantha_x_Brachairia_ruziziensis_cv._Mulato_in_the_CautoValley,_Cuba, title = {Yield of dry matter and nutritive quality of the pasture Brachiaria brizantha x Brachairia ruziziensis cv. Mulato in the CautoValley, Cuba}, author = {Ram?rez, J. L. and Herrera, Rafael Segundo and Leonard, I. and Verdecia, D. and ?lvarez, Y.}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs294}, cu_id = {https://cu-id.com/1996/ojs294}, abstract = {The influence of the regrowth age (30 to 105 d in the rainy season and dry season) and the climate factors on the yield of dry matter and the nutritive quality of the pasture Brachiaria brizantha x Brachairia ruziziensis cv. Mulato were assessed in a random block design with four replicates. The trial was developed on a fluvisol type soil in dry conditions and without fertilization. The DM yield was increased significantly up to 90 d (P < 0.001), and quadratic equations were fitted to the DM yield and the age in both seasons. Crude protein and DM and OM digestibility decreased with age (P < 0.001), and equations of quadratic regression were fitted to these variables and age. The highest percentages were noted at the age of 30 d in both seasons. NDF, ADF, lignin, and cellulose were increased with age (P < 0.001). The highest values were noted at 105 d of regrowth in both seasons, and the equations of quadratic regression of these variables were fitted to age. It may be concluded that age and the edaphoclimatic conditions had marked effect on the performance of the indicators assessed by decreasing the nutritive quality in the rainy season, and the yield in the dry season. Further studies on the performance of these chemical composition indicators are recommended.Key words. Brachiaria, chemical composition, digestibility, climatic factors.}, }
Cu-ID: https://cu-id.com/1996/ojs293 Redirecciones: 27 URL: https://cjascience.com/index.php/CJAS/article/view/293 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/293 BibTeX: @article{Plantation_distances_and_fertilization_levels_on_the_production_of_vegetative_seed_of_Pennisetum_purpureum_cv._Cuba_CT-115_by_the_plowing_method, title = {Plantation distances and fertilization levels on the production of vegetative seed of Pennisetum purpureum cv. Cuba CT-115 by the plowing method}, author = {Padilla, C?sar and Mart?nez, Ram?n Omar and Curbelo, F. and Fraga, Nidia and Cino, Delia Mar?a and Sarduy, Luc?a}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs293}, cu_id = {https://cu-id.com/1996/ojs293}, abstract = {The effect of the plantation distance and the chemical fertilization levels on the vegetative seed production and quality of Cuba CT-169 pasture, sown by the plowing method, was studied in a split plot design with five replicates. The principal plots were the plantation by the plowing method at 90 and 180 cm between furrows. The subplots corresponded to the application of 0 and 500 kg/ha of the formula 8-6-10 in the first cut. The height (289.25 cm), the length of the internodes (12.75 cm), and the number of buds/stem were higher in the plowing method at 180 cm, with fertilization. However, the differences were not significant in the second cut (October 2006). The yield of green biomass (148.269) in the first cut was obtained in the plowing method at 90 cm, with fertilization. In this cut, the yield of stems (123.7 t/ha) and their capacity of multiplication (20.6) was higher (P < 0.001) with the plantation by the plowing method, with fertilization. In the second cut, the yield of vegetative stems (45.7 t/ha) and the capacity of multiplication (7.6) were obtained with the plowing method at 180 cm, not being affected by the fertilization. The cost of plantation of the CT-169 was 127.66 pesos/ha lower with the plowing method at 180 cm. It was concluded that for the vegetative seed production the pasture Cuba CT-169 should be planted at 180 cm and be fertilized with 500 kg/ha of complete formula because it is the best technical and economic alternative. It should not be discarded the possibility of using the first cut as seed in areas with plantation at 90 cm and fertilization.Key words: Cuba CT-169 pasture, vegetative seed, costs.}, }
Cu-ID: https://cu-id.com/1996/ojs291 Redirecciones: 29 URL: https://cjascience.com/index.php/CJAS/article/view/291 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/291 BibTeX: @article{Cecal_and_blood_fermentative_indicators_in_broiler_chickens_fed_Morus_alba_foliage_meal_in_the_ration, title = {Cecal and blood fermentative indicators in broiler chickens fed Morus alba foliage meal in the ration}, author = {Mart?nez, Madeleidy and Sav?n, Lourdes and Dihigo, Luis Enrique and Hern?ndez, Yasmila and Oramas, A. and Sierra, F?lix and Montejo, Alba and Cueto, Milbis and Herrera, F?lix Rafael}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs291}, cu_id = {https://cu-id.com/1996/ojs291}, abstract = {In order to study the cecal and blood fermentative indicators through the substitution of the corn ration by foliage of Morus alba (mulberry), 32 male broiler chickens of 21 d of age (HE21) were used. The birds were distributed according to complete random design into four treatments and eight repetitions, being a control (corn-soybean) and three levels of inclusion of mulberry foliage: 5, 10, and 15 %. The weight of the empty and full ceca and their length were measured. Besides, the concentration of total short-chain fatty acids (SCFA) and ammonia was determined, as well as the values of pH. Hemoglobin, hematocrit, and total cholesterol concentration were determined in blood. There was increase (P < 0.05) in the relative weights of the ceca (empty and full) using diets with mulberry foliage meal, compared with the control group (12.86, 13.93, and 13.96 vs 7.68 g/kg, respectively). The lengths of the right and left ceca differed (P < 0.05) between the control and the 10 % of substitution of mulberry foliage meal (17.88 vs 22.00 and 19.00 vs 23.25 cm, respectively, being superior in the latter. A similar performance (P < 0.05) had the concentration of total SCFA (49.60 vs 81.00 mmol/L). In the concentration of NH3 and the pH values, the control was superior (P < 0.05) compared with the rest of the treatments (2.43 vs 1.16, 1.32 vs 1.05 mmol/L and 6.74 vs 5.54, 5.58 and 5.70, respectively). The blood indicators did not show differences for hemoglobin and hematocrit. However, the cholesterol diminished with the inclusion of the mulberry foliage meal in the ration. It was concluded that with the inclusion of mulberry foliage meal up to 15 % in the ration of broiler chickens, the fermentative capacity of the ceca is increased, and it is proved the decrease in the cholesterol absorption provoked by this fibrous source. Key words: cecal fermentative indicators, blood indicators, broiler chickens, Morus alba foliage.}, }
Cu-ID: https://cu-id.com/1996/ojs290 Redirecciones: 29 URL: https://cjascience.com/index.php/CJAS/article/view/290 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/290 BibTeX: @article{Meal_of_breadfruit_tree_(Artocarpus_altilis)_as_alternative_substitute_for_corn_in_broiler_chicken_diets, title = {Meal of breadfruit tree (Artocarpus altilis) as alternative substitute for corn in broiler chicken diets}, author = {Leyva, Coralia and Valdivie, Manuel and Ortiz, A. and Febles, M. and Dieppa, Oraida}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs290}, cu_id = {https://cu-id.com/1996/ojs290}, abstract = {A total of 224 broiler chickens of one day of age of the hybrid HE21 was used to evaluate the inclusion of 0, 10, 20, and 30 % of meal of breadfruit tree (Artocarpus altitis) as substitute for corn in? conventional feedstuffs for broiler chickens. An analysis of variance was performed according to simple classification design with four treatments and seven repetitions. With the inclusion of 0, 10, and 20 % of meal of the breadfruit tree, the viability (98.2, 98.2, and 96.4), the liveweight (1801, 1791, and 1784 g/bird), the weight of the carcass (1131, 1116, and 1108 g/bird), and the weight of the breast (306, 299, and 292 g/bird) did not differ between treatments. Nevertheless, the inclusion of 30 % deteriorated the liveweight, the intake, and the conversion. The cost of the feed per ton of carcass was reduced in 56.39 and 138.54 USD, when including the meal of breadfruit tree at concentrations of 10 and 20 %, respectively. It is recommended to include, as maximum limit, 20 % of the meal of the breadfruit tree in broiler chicken diets.Key words: breadfruit tree, broiler chickens}, }
Cu-ID: https://cu-id.com/1996/ojs289 Redirecciones: 33 URL: https://cjascience.com/index.php/CJAS/article/view/289 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/289 BibTeX: @article{Evaluation_of_different_varieties_of_mulberry_(Morus_alba)_in_the_control_of_the_methanogenesis_in_buffalo_rumen_liquid, title = {Evaluation of different varieties of mulberry (Morus alba) in the control of the methanogenesis in buffalo rumen liquid}, author = {Gonz?lez, Niurca and Galindo, Juana and Aldana, Ana Irma and Moreira, Onidia and Sarduy, Luc?a and Abdalla, L. A. and Duarte, M. Regina}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs289}, cu_id = {https://cu-id.com/1996/ojs289}, abstract = {The methane production in rumen causes atmospheric harms and reduces animal productivity. The goal of this study was to evaluate the effect of four varieties of mulberry (Morus alba) on the total gas and methane production under in vitro conditions and select the most promising variety in the control of the river buffalo rumen methanogenesis. A complet random design with factorial fit (5 x 5) was used to evaluate five treatments: 1) 100 % of star grass (SG) (Cynodon nlemfuensis) (control), 2) SG + 30 % Cubana variety, 3) SG + 30 % Acorazonada variety, 4) SG + 30 % Tigreada variety, and 5 ) SG + 30 % Indonesia variety. The in vitro gas production technique was used, and the volumes of gas and methane produced were measured at 4, 8, 12, and 24 h of incubation. It was observed that the gas production was increased in time for all the treatments. At 24 h of incubation, the four varieties of mulberry (Morus alba) produced more gas than the control, and the Indonesia variety was the one that produced gas the most (102.36 mL gas/g of DM). The methane production was similar between the control and the treatment with 30 % of the Cuban variety (99.74 and 89.13 ?L/g of DM, respectively). As compared to the control, the varieties Acorazonada, Tigreada, and Indonesia produced more methane. Out of them, Indonesia was the one that produced the most. It was concluded that the 30 % inclusion of the varieties evaluated did not decrease the methane production in rumen. It is recommended to evaluate other levels of inclusion of the Cubana variety to attain higher reduction in the methane production.Key words: methane, gas production, rumen.}, }
Cu-ID: https://cu-id.com/1996/ojs288 Redirecciones: 42 URL: https://cjascience.com/index.php/CJAS/article/view/288 OAI: https://cjascience.com/index.php/CJAS/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:ojs.pkp.sfu.ca:article/288 BibTeX: @article{Ensilability_characteristics_of_chia_(Salvia_hispanica_L.)_during_its_growth_cycle_and_fermentation_pattern_of_its_silages_affected_by_wilting_degrees, title = {Ensilability characteristics of chia (Salvia hispanica L.) during its growth cycle and fermentation pattern of its silages affected by wilting degrees}, author = {Peiretti, P. G.}, journal = {Cuban Journal of Agricultural Science}, volume = {44}, number = {1}, pages = {}, year = {2010-03-01}, publisher = {Instituto de Ciencia Animal}, language = {eng}, url = {https://cu-id.com/1996/ojs288}, cu_id = {https://cu-id.com/1996/ojs288}, abstract = {The chia was grown in the Po valley, northern Italy. The chia growth was characterised by a rapid dry matter (DM) accumulation in the herbage during development and the DM content increased from 84 to 224 g/kg fresh matter (FM). Significant differences were observed in the pH, that range from 6.0 to 6.2. The water soluble carbohydrates (WSC) content increased from 86 to 213 g/kg DM, while the buffering capacity (BC) decreased from 689 to 416 meq/kg DM with increasing growth stage. The soluble nitrogen (SN) ranged from 105 to 174 g/kg TN. Four types of silage were prepared with no additives (cut silage and wilted silages at three levels of wilting) at budding stage to investigate the effects of wilting on the chemical composition and fermentation characteristics of the silage. The results of ensiling indicate that the fermentation of chia is characterized by the presence of some alcohols and volatile fatty acids and a lack of lactic acid. The variability in the herbage quality characteristics harvested at five different stages of maturity and the variability in the silage characteristics were analysed for their statistical significance via analysis of variance (ANOVA) to test the effect of the growth stage and wilting level, respectively. No significant differences were found in TN, gross energy, pH or the fermentation characteristics, with the exception of isobutyric acid, which decreased with increasing wilting level. The good results obtained in lab-scale silos, with silage characterised by a restricted fermentation and a lack of butyric acid at the three high wilting levels, would seem to suggest that chia has the potential for large scale ensiling, if it is harvested at budding stage and wilted to a DM level of more than 285 g/kg FM. Further research is required to define the conservation quality in farm scale silos or in lab silos with additives that improve silage fermentation when chia is ensiled at cut or at low wilting levels. Key words: chemical composition, water soluble carbohydrates, conservation quality, silage}, }
