Simulation tools can be helpful for supporting implementation of livestock production systems and exploring ways of improvements. The aim of this paper is to present a support tool for implementation and evaluation of silvopastoral systems in the Peruvian Amazon Region. This approach is based on the design of a decision support model called Agrosilvopastoril v 19.1. It calculates livestock production using integrated information on climate, soil, crops, forestry, pastures and cattle herds collected from secondary sources and on-field work conducted at the Peruvian Northern Amazon Region. The model was tested to estimate carbon sequestration and enteric methane emissions in 10 has of silvopastures with different proportions of forest and pasture, showing an increase in carbon sequestration with a small reduction in the number of animals and similar methane emissions.

This paper was written in the context of the project: Desarrollo de un software para predecir el desempe no structural de product terminado en el proceso de fabricacion por manufactura aditiva de materiales compuestos founded by Cienciactiva, CONCYTEC, under the contract number No 112-2018-FONDECYT-BM-IADT-MU. The authors of this manuscript appreciate the financial support from the Peruvian Government.

Productivity of alpaca grazing rangelands in the Andes is often limited by the low availability and quality of those pastures during the dry season of the year. The use as supplements of forages cultivated during the rainy season in appropriate areas in the Andes may be a strategy to improve performance of alpacas. Therefore, the supplementation of oat-vetch pellets or oat hay was evaluated and compared with a control group without supplementation. Sixty-three female alpacas (15 months of age, 34 ± 1.0 kg BW), divided in three groups, grazing range pastures (6.1% crude protein and 61.3% NDF) during dry season in Puno region of the Peruvian Andes were used for the study. The supplement was offered daily after grazing (400 g/alpaca/day). The study lasted for 84 days with evaluations of weight gain and intake every 28 days. Weight gain was greater for animals supplemented with oat-vetch pe...

Las comunidades crustáceas de suelos en los ecosistemas desérticos del mundo tienen una microflora peculiar de importancia en la formación y estabilización de los suelos. El desierto Peruano Central se caracteriza por la formación de lomas y costras microbióticas debido a la humedad. Colecciones de talos de las costras desérticas de las lomas de Pachacamac (Jatun Sisa) se realizó en noviembre de 1995 y 1997. Inoculaciones de las costras y cultivos en medios Basal de Bold y N8 se realizaron a temperaturas promedio de 21°C y fueron seguidas hasta 1.5 años. La colonización algalJiquénica de las costras por las cianobacterias Scytonema crispum, Microcoleus vaginatus y Nostoc commune (Scytonemataceae, Oscillatoriaceae y Nostocaceae) y los líquenes Parmelia (Parmeliaceae) y Ramalina (Usneaceae) caracterizó a las comunida es saxícolas. Los talos cianobacteriales tuvieron mejor de...

Las comunidades crustáceas de suelos en los ecosistemas desérticos del mundo tienen una microflora peculiar de importancia en laformación y estabilización de los suelos. El desierto Peruano Central se caracteriza por la formación de lomas y costras microbióticasdebido a la humedad. Colecciones de talos de las costras desérticas de las lomas de Pachacamac (Jatun Sisa) se realizó en noviembre de 1995y 1997. Inoculaciones de las costras y cultivos en medios Basal de Bold y N8 se realizaron a temperaturas promedio de 21°C y fueronseguidas hasta 1.5 años. La colonización algalJiquénica de las costras por las cianobacterias Scytonema crispum, Microcoleus vaginatusy Nostoc commune (Scytonemataceae, Oscillatoriaceae y Nostocaceae) y los líquenes Parmelia (Parmeliaceae) y Ramalina(Usneaceae) caracterizó a las comunidades saxícolas. Los talos cianobacteriales tuvieron mejor desarrol...

This work was supported by the Dirección General de Ciencia y Tecnología (DGCYT) [MAT2015-63955-R]; the Vice-Rectorate for Research of the Pontificia Universidad Católica del Perú and the National Council of Science, Technology and Technological Innovation of Peru (CONCYTEC/FONDECYT).

This work was supported by the DGCYT [MAT2015-63955-R]; the Vice-Rectorate for Research of the Pontificia Universidad Católica del Perú and the National Council of Science, Technology and Technological Innovation of Peru (CONCYTEC/FONDECYT).

            The aim of the study was to compare three doses of eCG associated with a short heat synchronization protocol in hair sheep. A total of 48 ewes were oestrous synchronized with intravaginal sponges impregnated with medroxyprogesterone acetate inserted for a period of six days. Upon removal of the sponge, a prostaglandin F2α analogue was applied. The animals were randomly divided into four groups: Control (without eCG) and T1, T2 and T3 with the application of 100, 250 and 400 IU of eCG, respectively. Oestrous detection and mating were made with four males of recognized fertility. The pregnancy diagnosis was made on day 60 after mating by transrectal ultrasound. The interval to heat and the rates of presentation of oestrous, pregnancy and prolificacy were determined. The interval of the onset of oestrous was shorter in T3 (...

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.

Has completed extensive epidemiological, clinical , electrocardiographic and prophylactic regarding Chagas disease in the major population centers of two valleys of southern Peru , showing the presence of very favorable for the presence of this disease epidemiological factors . Almost 100% of households had T. infesfans and over 50% of them , these triatomines were infected with T. cruzi. Inside the homes of many and varied pets prevalent among guinea pigs, rabbits , cats and dogs , which have important role as a reservoir of T. cruzi are raised. 320 has been practiced xenodiagnoses to equal numbers of homes in Moquegua , resulting 12 positive among 113 dogs, 11 positive in 62 guinea pigs, 68 cats between 2 positive and 2 positive in 30 rabbits. The remaining (27 pigs , 8 horses , 6 goats, donkeys and 6 ) were negative. We practiced xenodiagnoses 752 and 553 reactions Guerreiro - Machado...

            The aim of the study was to compare three doses of eCG associated with a short heat synchronization protocol in hair sheep. A total of 48 ewes were oestrous synchronized with intravaginal sponges impregnated with medroxyprogesterone acetate inserted for a period of six days. Upon removal of the sponge, a prostaglandin F2α analogue was applied. The animals were randomly divided into four groups: Control (without eCG) and T1, T2 and T3 with the application of 100, 250 and 400 IU of eCG, respectively. Oestrous detection and mating were made with four males of recognized fertility. The pregnancy diagnosis was made on day 60 after mating by transrectal ultrasound. The interval to heat and the rates of presentation of oestrous, pregnancy and prolificacy were determined. The interval of the onset of oestrous was shorter in T3 (...

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.

This study aims to understand the relationship between organizational trust and empowerment of employees in public and private organizations of Lima. Using two questionnaires measuring variables in a sample of 327 professionals from various specialties who complete postgraduate studies (second specialty, masters and doctorate) in a public university, it was found that there is a high degree of trust and empowerment among the participants about their position in the organization where they work; and both variables are associated significantly and positively. An analysis to determine the importance of population and organizational behavior variables sample indicates that there is very weak differences in the relationship among trust, gender,marital status and any other; whereas there is no relationship among empowerment and demographic or organizational variable, they are independent varia...

This study aims to understand the relationship between organizational trust and empowerment of employees in public and private organizations of Lima. Using two questionnaires measuring variables in a sample of 327 professionals from various specialties who complete postgraduate studies (second specialty, masters and doctorate) in a public university, it was found that there is a high degree of trust and empowerment among the participants about their position in the organization where they work; and both variables are associated significantly and positively. An analysis to determine the importance of population and organizational behavior variables sample indicates that there is very weak differences in the relationship among trust, gender,marital status and any other; whereas there is no relationship among empowerment and demographic or organizational variable, they are independent varia...

The Tropical Peruvian Andes host  a great ecosystem diversity such as the montane cloud forest at the southern east slopes. The subaerial moist habitats  along the Alccamayo creek  belong to Aguas Calientes,  Cusco . They were evaluated  in  winter (august 2017) between 2184  and 3000 m of elevation with the  mean temperature between 16 and 18°C. In the southern  highland Andean, the  cryosphere of  the  Allincapac glaciers, Carabaya  Cordillera, Puno,  was evaluated  in summer season (february 2018) between 4500 and 4700 m elevation. The thermogradients were between 0 and 10°C and pH between 6.0 and 6.5. Collections of subaerophytic assemblages with litophilic, and  chasmolithic microalgae and cyanobacterial  were carried out  by scraped the biofilms or crusts from the cliffs of  calcareous  rock  surfaces  or ice layers. Highland colonization (Allincapac  glaci...

Los ecosistemas áridos del mundo abarcan aproximadamente el 40% de la superficie terrestre parte del cual es colonizado por las costras biológicas del suelo. Las colecciones de costras biológicas se realizaron en las lomas costeras de Pachacamac e Iguanil del desierto Peruano costero central en Sudamérica. Ellas fueron tipificadas como comunidades aereoterrestres epilíticas y edáficas con la caracterización de las morfoespecies de la estreptofita del género Klebsormidum. Las especies K. fluitans, K. flaccidum y K. crenulatum son primeros reportes para nuestra flora microalgal que extienden su distribución y similitud a otras regiones biogeográficas de nuestra biosfera. Las especies exhibieron plasticidad fenotípica reconocido por los morfotipos transicionales y estrategias reproductivas (aplanosporas, fragmentación) para su dispersión y propagación en respuesta a las condic...

Los ecosistemas áridos del mundo abarcan aproximadamente el 40% de la superficie terrestre parte del cual es colonizado por las costras biológicas del suelo. Las colecciones de costras biológicas se realizaron en las lomas costeras de Pachacamac e Iguanil del desierto Peruano costero central en Sudamérica. Ellas fueron tipificadas como comunidades aereoterrestres epilíticas y edáficas con la caracterización de las morfoespecies de la estreptofita del género Klebsormidum. Las especies K. fluitans, K. flaccidum y K. crenulatum son primeros reportes para nuestra flora microalgal que extienden su distribución y similitud a otras regiones biogeográficas de nuestra biosfera. Las especies exhibieron plasticidad fenotípica reconocido por los morfotipos transicionales y estrategias reproductivas (aplanosporas, fragmentación) para su dispersión y propagación en respuesta a las condic...