Institute Investigaciones Agropecuarias Jorge Dimitrov

Jorge, Cuba

Institute Investigaciones Agropecuarias Jorge Dimitrov

Jorge, Cuba
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Kirenia P.C.,Luis Vargas Torres Technical University | Fonseca Fuente N.,University of Granma | Vazquez Aldana J.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Rojas Gamez N.,Institute Investigaciones Agropecuarias Jorge Dimitrov | And 5 more authors.
Revista Electronica de Veterinaria | Year: 2017

At present, there is a need to supplement with leguminous foliage Pelibuey sheep. The objective of the present investigation was to evaluate the productive behavior of this species during lactation, supplemented with Leucaena leucocephala (Ll). The experiment covered a period of five months, 63 breeding animals were used. In the control group, the main source of protein was the concentrate, in the second and third were supplemented with 25 and 35%, respectively, of the aforementioned plant, distributed in a completely randomized design with three treatments according to the level of inclusion of the leguminous and three repetitions (seven animals for each one); The data were processed using a simple classification variance analysis. The indicators of live weight of the pups at weaning and breeding were evaluated at the beginning and end of lactation and milk production (MP). The results showed that the MP peak was in the fourth week with values of 1.30; 1.29 and 1.38 for treatments I; II and III, respectively, and began to fall in the octave to 16 (0.50, 0.50 and 0,49 L for I, II and III, respectively). It was concluded that feeding system with Leucaena leucocephala constitutes an efficient alternative in the nutrition of the sheep favoring the productive indicators at the end of lactation and of the weaned offspring.

Guevara Hernandez F.,Autonomous University of Chiapas | Rodriguez Larramendi L.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Gomez Castro H.,Autonomous University of Chiapas | Pinto Ruiz R.,Autonomous University of Chiapas | And 2 more authors.
Acta Agronomica | Year: 2014

This article describes the farmers' criteria for chayote (Sechium edule Jacq. Sw.) seed selection in rural areas of the municipalities of Villa Corzo and Villaflores, Chiapas, México. The study was based upon a socio-anthropological analysis following the ethnoagronomy and ethnobotany approaches in order to gather and systematize the traditional knowledge. Through semi-structured interviews applied to 60 farmers, the seed (fruit) selection criteria were studied regarding color, size and presence of spines; besides, information on origin of their varieties and some recommendations for the chayote cropping was obtained. It was docu-mented that in both municipalities the chayote cropping is done without taking into consideration the var-iables previously mentioned by the farmers themselves as important. More than 60% of the farmers buy the seeds and recommend other fellows those varieties having spines due to their flavor. The validity of the socio-anthropological studies regarding traditional farming systems is confirmed, particularly on ethnobot-any, in order to locally understand social and productive relationships. This is an important element to document, analyze, validate and understand farmers' criteria as an option for the improvement of local farming systems.

Vargas J.,Technical State University of Quevedo | Benitez D.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Torres V.,Institute Ciencia Animal | Velazquez F.,University of Granma | Erazo O.,Technical State University of Quevedo
Cuban Journal of Agricultural Science | Year: 2011

In order to establish tools for adopting sustainable alternatives for cattle production in the tropical mountain foot of the Republic of Ecuador, a participative non-experimental research system was developed in the Los Ríos and Cotopaxi provinces. The methodologies of Benítez et al. (2000) and Torres (2005) were applied, as well as others of participative diagnosis. The sample included 60 farms, representing 30 % of those with more than five hectares, devoted to cattle rearing in the region. The cattle systems were typified and their effects on the environment were identified, as well as the needs for their sustainable development. The environmental degradation was associated with the application of production alternatives non-suitable to the environmental characteristics and to the absence of an adequate innovation management system, which considers the social and cultural situation. Three groups of farms were identified, being differentiated by the productive purpose, the land slope, the surface area under exploitation, the herd size and the mechanization level. The alternatives applied did not differ, except in few mechanized farms. Out of the demands identified, solutions were defined for sustainable cattle production. The methodology for the participative rural innovation and the sustainable cattle production of the region was adjusted. This methodology is recommended for the tropical mountain foot of the Republic of Ecuador, as long as the necessary controls are guaranteed to adjust the technologies to the corresponding conditions.

Alvarez I.,SERIDA Deva | Capote J.,Instituto Canario Of Investigaciones Agrarias | Traore A.,INERA | Fonseca N.,Institute Investigaciones Agropecuarias Jorge Dimitrov | And 5 more authors.
Small Ruminant Research | Year: 2012

The aim of this research was to assess: (a) the genetic relationships between the Cuban Pelibuey and both the Hair-Mexican and Hair-Canarian sheep populations; and (b) the influence of African hair sheep in the formation of the Cuban Pelibuey breed. A total of 146 individuals of Cuban Pelibuey hair sheep breed were sampled and genotyped for 26 microsatellites together with 26 Hair-Mexican and 24 Hair-Canarian individuals. Additionally, the same microsatellites set was typed on 110 West African hair sheep and on 41 individuals belonging to the Wooled-Canarian (23) and the Wooled-Palmera (18) sheep breeds to be used as outgroup. Genetic distance, correspondence and STRUCTURE analyses pointed out that the Cuban Pelibuey has a particular genetic background. This population has relatively high levels of gene diversity (0.685. ±. 0.006) and rarefacted allelic richness (5.9). No signals of genetic bottleneck in the Cuban Pelibuey sheep were detected. The Hair-Canarian and the Hair-Mexican populations are closely related. This is likely to be due to a major role of the Cuban Pelibuey sheep in their formation. The influence of African hair sheep into the Cuban Pelibuey could be limited and recent in historical terms. © 2011 Elsevier B.V.

Ramirez J.L.,University of Granma | Herrera R.S.,Institute Ciencia Animal | Leonard I.,University of Granma | Cisneros M.,Institute Investigaciones Agropecuarias Jorge Dimitrov | And 3 more authors.
Cuban Journal of Agricultural Science | Year: 2012

In a random block design with four replications, quality indicators related to the climate and age of Pennisetum purpureum cv. Cuba CT-169 were determined in both seasonal periods. The experiment was carried out in a fluvisol soil, under non-irrigation conditions and without fertilization. A multivariate analysis of main components was made, considering the climatic factors and the quality indicators. The preponderance value, equal or higher than 0.75 was considered as the selection factor. Linear multiple equations and the values of the coefficient of determination were above 0.88. The highest R2 were obtained for DMD and OMD (equation II = a + b*CF +d*Age, P < 0.001). Pennisetum purpureum cv. Cuba CT-169 can be characterized by rainfall, temperature (minimum, mean, maximum) and relative humidity, also through CP, CF, ADF, L, CW, DMD, OMD, ME, FNE, CC and cellulose. Linear multiple regression equations were established between DMD, OMD, ME and FNE considering: a) CP, CC and age; b) CF, CW and age; c) CP, L and age, with high R2 and low standard errors of estimation and square mean of the error. Further studies on regrowth physiology in other varieties and types of soil are recommended. More studies mainly on the performance of the chemical composition indicators are suggested to collect more information about the climatic conditions of Cauto Valley so as to validate results in other regions of the country.

Martinez Y.,University of Granma | Valdivie M.,Institute Ciencia Animal | Estarron M.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco | Solano G.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Cordova J.,University of Guadalajara
Cuban Journal of Agricultural Science | Year: 2010

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 α-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 to 10% 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.

Ramirez J.L.,University of Granma | Herrera R.S.,Institute Ciencia Animal | Leonard I.,University of Granma | Cisneros M.,Institute Investigaciones Agropecuarias Jorge Dimitrov | And 2 more authors.
Cuban Journal of Agricultural Science | Year: 2011

Quality and yield data of Pennisetum purpureum cv. Cuba CT-169 were used. The data were from an experiment using a random block design with four replicates, connecting them with climate factors. The experiment was carried out on soil of the fluvisol type, and without fertilization and irrigation. An analysis of linear correlation was performed between the indicators of yield, quality, and climate elements in each period. Besides, multiple linear equations were determined between them. High correlations were obtained (coefficients higher than 0.80) with the rainfall and the average temperature (except for the yield, the percentage of leaves and stems, CP, hemicellulose, ash, and OM). With the relative humidity, ADF, lignin, phosphorus, cellulose, ash, and OM were oustanding in the rainy season. In the rainy season, the yield, CP, CF, cell wall, phosphorus, cell content, hemicellulose, ME and NFE were outstanding. Multiple linear equations were determined and the values of the coefficient of determination were above 0.92. In the rainy season, the highest R2 were obtained for CP, and, in the dry season, for DMD, ME and NFE (P < 0.001). It was established the degree of relation between some climatic factors, the yield, and the quality of the CT-169 in the Cauto Valley. Equation sof multiple linear regression were established relating the yield, CP, CF, lignin, DMD, OMD, ME, and NFE with the rainfall, maximum temperature and humidity. This allows to make an approximate calculation of the indicators, out of the knowledge of the climatic factors. This type of study should be continued with other species and environmental conditions, in a way that the results could be further spread.

Perez A.A.S.,University of Granma | Lopez A.P.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Acosta M.E.F.,Sede Universitaria Municipal de Manzanillo
Tecnica Pecuaria en Mexico | Year: 2010

A continuous in vivo digestibility trial was done to measure the effects of ten regrowth ages (18, 25, 32, 39, 46, 53, 60, 67, 74 and 81 d) on forage yield, chemical composition, nutrient digestibility, energy density and optimal harvest age in napier grass, using energy and digestible protein production per hectare as the main variables. Experimental period was the rainy season and study area was Bayamo, Cuba. Four mature Pelibuey sheep wethers in metabolism cages were fed fresh forage twice daily under a completely randomized design. As regrowth age increased, biomass per hectare increased (up to 2.58 t/cut) and nutrient contents decreased. Crude protein decreased from over 14 % at 18 d to almost 6 % at 81 d, in contrast to progressive increases in dry matter (14 to 18 %) and crude fiber (30 to 38 %). With increasing regrowth age, linear reductions were observed in nutrient digestibility coefficients and estimated metabolizable energy (9.54 to 5.86 MJ/kg DM). Based on a combination of energy and digestible protein yield per hectare, recommended harvest age under the studied conditions is within an interval of 54 and 60 d of regrowth.

Angel Santana P.,University of Granma | Mario Cisneros L.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Yordan Martinez A.,University of Granma | Yoandris Pascual S.,University of Granma
Revista MVZ Cordoba | Year: 2015

Objective. Quantify the effects of mixing Leucaena (L) with King grass forage, fresh (K) or wilted (Kp), on the fermentation process and chemical composition of mixed silages. Materials and methods. Silos were produced mixing several proportions (kg:kg) K:L and Kp:L (100:0; 75:25; 60:40; 50:50; 40:60 and 0:100) of both types of plants, under a completely randomized design of four replications. The quantity of organic acids (butyric, acetic, lactic), pH, ammonia nitrogen percent and some of the typical bromatologic nutrients of the forage before and after ensiling were measured. The treatment effects were evaluated through variance and regression analysis. Results. The results clearly proved the differences (p<0.05) between King grass and Leucaena which promote its mixing and wilting: better legume contents of crude protein (24 vs. 7%), dry matter (33.77 vs. 22.05%) and crude fiber (26.53 vs. 32.5%). Clear benefits on the conservation process of mixed silages were also measured: higher lactic productions and less butyric, acceptable pH (4.02-4.8) and protein degradation (<8%). In addition, a positive effect on the chemical composition of the aforementioned silages was quantified (crude protein, dry matter and crude fiber progressive improvement). Conclusions. Mixed K+L silages are better than pure K if L is included below 25% in KL and up to 40% when K has been wilted. Higher inclusions of L will worsen the conservation process and will limit its elaboration.

Chavez Suareq L.,Institute Investigaciones Agropecuarias Jorge Dimitrov | Ramirez Fernandez R.,Institute Investigaciones Agropecuarias Jorge Dimitrov
ITEA Informacion Tecnica Economica Agraria | Year: 2010

Salinity and drought affects considerably the crop productivity at world level. The signalling of these phenomena in plants, is a complex process that involucrate different pathways an signalling molecules. Some mechanisms of plant signal transduction are described in this paper against these types of abiotic stress.

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