Examinando por Autor "Ampuero Trigoso, Gustavo"

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Agronomic behaviour and chemical composition of three varieties of Pennisetum sp in the Peruvian Tropics
(Hindawi, 2023-10-23) Watanabe Escobedo, Enrique Susumu; Juancho Ramirez, Ronald; Alvarado Atanacio, Carlos Enrique; López Rengifo, Debora; Injante Silva, Pedro Hugo; Ampuero Trigoso, Gustavo; Saucedo Uriarte, José Américo
Livestock production in the Peruvian tropics is mainly based on grazing and cutting grasses, which have variable productive and nutritional characteristics according to the variety of grasses, agronomic management, and climatic conditions. The objective of this research was to compare the agronomic behaviour and chemical composition of three varieties of Pennisetum sp (Pennisetum purpureum Schum cv. Cameroon or Cameroon grass, Pennisetum sp. or Maralfalfa, and Pennisetum purpureum × Pennisetum typhoides or King grass). The experiment was carried out at the Estación Experimental Agraria “Campo Verde,” Ucayali, Peru, under a randomized complete block design (RCBD) with a 3 (Pennisetum sp. variety) × 3 (cutting age) factorial arrangement and 4 replicates each. Thirty-six subplots were installed, and treatments were randomly assigned, using vegetative seed with three buds each. Measurements of agronomic behaviour and chemical analysis were carried out in the 8th, 12th, and 16th week. The data were subjected to ANOVA and multiple comparisons with the Duncan and Kruskal–Wallis tests ( < 0.05) and correlations using Pearson coefficients ( < 0.05). The agronomic behaviour did not vary between Pennisetum sp. varieties, but according to cutting age, Cameroon grass produced greater plant height, biomass, dry matter, and Mg content at the 8th week. The highest concentrations of N (2.38 ± 0.11%), P (0.18 ± 0.01%), and Ca (0.70 ± 0.03%) were recorded at the 8th week, Zn (27.33 ± 1.91 mg/kg) at the 12th week, and Mg (0.26 ± 0.02%) at the 16th week. A negative correlation was found between biomass and the stem-leaf ratio at the 12th week because the first leaves of plants died, but the stems increased in size. It is concluded that, at an early cutting age in varieties of Pennisetum sp., lower biomass and dry matter result, but higher content of N, P, Ca, and Fe; and at a late cutting age, it shows greater biomass, dry matter, Cu, and Mg content.
Caracterización del sistema productivo de fincas ganaderas de las provincias Tambopata y Tahuamanu, Madre de Dios, Perú
(Facultad de Ciencias Veterinarias de la Universidad del Zulia, 2022-12-29) Quispe Ccasa, Hurley Abel; Canto Saenz, Francys Mitchel; Ampuero Trigoso, Gustavo; Feijoo Narvasta, Shefferson Gilbert Wilson; Huaman Fuertes, Ethel
Las políticas agrarias para el mejoramiento de la productividad pecuaria requieren información para formular estrategias de intervención, de acuerdo a las características heterogéneas de los ganaderos y el manejo de sus fincas. El objetivo del estudio fue caracterizar el componente sociodemográfico de los ganaderos y las características del sistema productivo de fincas ganaderas de las provincias de Tambopata (distrito Laberinto, Las piedras y Tambopata) y Tahuamanu (distrito Iberia e Iñapari), departamento de Madre de Dios, Perú. Se aplicó una entrevista estructurada a 183 ganaderos en los cinco Distritos, considerando 33 indicadores. Los datos se analizaron con estadística descriptiva, tablas de contingencia, asociación, ANOVA y prueba de Kruskal-Wallis, y análisis de conglomerados. Se encontró asociación significativa entre distrito con género, ocupación secundaria y fuente de ingresos primaria. La provincia y distrito se asociaron a la fuente de ingreso primaria, tipo de mano de obra, preparación de terreno, pasto para pastoreo y raza bovina secundaria (P<0,05). Hubo diferencias entre años de residencia en el departamento de Madre de Dios y años de dedicación a la ganadería, según provincia, distrito, género y edad (P<0,01). Además, el número de hectáreas para pastoreo y número de cabezas de ganado variaron por provincia y distrito (P<0,01). Se caracterizaron tres grupos de ganaderos: tradicional-experimentado, menos experimentado y experimentado. Los años en la ganadería fueron 32,4 ± 9,5; 16,2 ± 7,7 y 28,0 ± 11,6 años y las unidades animal promedio fueron 69,9 ± 47,7; 40,3 ± 34,6 y 314,4 ± 106,5, respectivamente. En general, existe predominio del enfoque productivo a ganado de carne (85,5 %), uso de Brachiaria brizantha para pastoreo (69,4 %) y el ganado criollo como el más frecuente (68,8 %).
Efecto de la altura de corte sobre los parámetros agronómicos de Tithonia diversifolia
(Universidad Nacional del Altiplano, 2023-04-30) Canto Saenz, Francys Mitchel; Ampuero Trigoso, Gustavo; Quispe Ccasa, Hurley Abel
Se evaluaron los parámetros agronómicos de Tithonia diversifolia por efecto de cuatro alturas de corte (AC) desde el suelo (AC1: 0 cm, AC2: 10 cm, AC3: 20 cm, AC4: 30cm), con cuatro replicas cada una, durante 55 días. Los brotes/macollo, hojas/brote y hojas/macollo fueron mayores (p<0.05) en AC1. Sin embargo, el número de hojas/mata y brotes/mata fueron mayores (p<0.05) en AC2, AC3 y AC4. El peso de forraje verde (FV)/macollo fue mayor (p<0.05) en AC1; aunque el peso de FV/mata fue mayor en AC2, AC3 y AC4, mostrando un mayor (p<0.05) rendimiento (kg/m2) en FV y materia seca para AC2, AC3 y AC4. El mayor número de hojas/brote (p<0.05) en AC2 que AC4 podría mejorar la productividad de T. diversifolia, sugiriendo a AC2 como adecuada AC.
Effect of different protocols of fixed-time artificial insemination on mucus, ovarian size, and pregnancy of mixed-breed cows in the Humid Tropics of Peru
(Hindawi, 2023-05-18) Diaz Quevedo, Clavel; Ramírez García, Alonso; Torres Bernal, Lenin; Cáceres Coral, Jorge; Ampuero Trigoso, Gustavo; Saucedo Uriarte, José Américo
The objective of the research was to evaluate three synchronization protocols for fixed-time artificial insemination (FTAI) in Bos indicus with Bos taurus crossbred cows. Forty-five cows of 5 ± 1.6 years were selected. The Jsynch treatment consisted of the application of an intravaginal device plus benzoate; on day 8, the device was removed and PGF2α, estradiol cypionate plus eCG was applied, and the FTAI was performed at 48–52 hours after. Conventional treatment consisted of the application of an intravaginal device plus benzoate; on day 8, the device was removed and PGF2α plus eCG was injected, and on day 9, estradiol benzoate was administered, and FTAI was performed at 30 hours. The Ovsynch treatment consisted of the application of GnRH, and on day 8, PGF2α was applied, on day 9, GnRH was applied again, and on day 10, FTAI plus GnRH was applied. The diagnosis of pregnancy was determined by transrectal ultrasound 45 days after the FTAI. The Jsynch (39.1%) and conventional (39.1%) treatment showed higher pregnancy compared to the Ovsynch treatment (21.7%) of pregnancy. The presence of crystalline mucus at the time of the FTAI was significantly associated with pregnancy. The results of this investigation indicate that it is possible to obtain acceptable pregnancy rates with the FTAI in B. indicus with B. taurus crossbred milk-producing cows, and treatments with progesterone-releasing devices plus eCG can improve the reproductive performance of cows.
Effect of pruning height and organic fertilization on the morphological and productive characteristics of Moringa oleifera Lam. in the Peruvian dry tropics
(Walter de Gruyter GmbH, 2024-06-18) Yalta Vela, Juan; Silva Valqui, Gelver; Ampuero Trigoso, Gustavo; Quispe Ccasa, Hurley Abel; Saucedo Uriarte, José Américo
The objective of the study was to evaluate the effect of pruning height (PH) and organic fertilization dose (FD) on the morphology and productive characteristics of Moringa oleifera Lam. We germinated seeds collected from 10-year-old shrubs, and 2-month-old seedlings were transplanted in the final field. We used a two-factor design of PH (PH1:0.4, PH2:0.8, and PH3:1.2m from the ground) and FD (FD0:0, FD1:500, FD2:750, and FD3:1,000 g of decomposing goat manure). We carried out an initial pruning 4 months after transplanting and the harvests every 45 days. After three consecutive harvests, PH3 improved N° branches (12.53 ± 3.09) and dry matter (21.98 ± 1.30%), but PH1 showed greater stem lengths (1.65 ± 0.24 m) (p < 0.01). There was no difference in the stems and leaf weights between PH2 and PH3, and no trait varied according to FD (p > 0.05). The PH × FD interaction can improve the plant diameter (p < 0.01) and dry matter (p < 0.05) with PH2 (56.79 ± 3.71 mm) and PH3 (23.20 ± 1.04%) from FD1. We found an increasing trend in N° branches, plant diameter (p < 0.01), and the leaf–stem ratio. However, in the third harvest, the biomass production trend was downward for a short period for an adequate replacement of nutrients from the incorporated organic fertilizer. It is recommended to prune M. oleifera at 1.2m from the ground to stimulate greater biomass and maintain the leaf–stem ratio throughout the evaluated harvests and apply more than 500 g of goat manure after each harvest to restore the nutrients extracted from the soil.
Evaluación agronómica y nutricional de pastos tropicales de corte sometidos a diferentes frecuencias de corte en Yurimaguas, Amazonia peruana
(Universidad Nacional Mayor de San Marcos, Facultad de Medicina Veterinaria, 2023-10-31) Rupay Taboada, Ruth Karen; Ampuero Trigoso, Gustavo; Vela G., Carlos; Angulo V., Carlos; Mathios F., Marco; Torres S., Ramiro
Se evaluaron cuatro pastos tropicales, Maralfalfa (Pennisetum violaceum Lam), pasto Morado (P. purpureum x P. typhoides), Elefante (Pennisetum purpureum, Schumach) y Guatemala (Tripsacum laxum, Nash) con dos intervalos de corte (45 y 70 días), mediante un experimento factorial con diseño de bloques completos al azar. La interacción pastos × frecuencias de corte fue significativa (p<0.05) para las características agronómicas y nutricionales. Pasto Morado y Guatemala cosechados a los 70 días obtuvieron mayor rendimiento de materia seca (17.13 y 17.03 t ha-1, respectivamente) que Maralfalfa, Morado, Elefante y Guatemala cosechados a los 45 días. En comparación con otros pastos, el pasto Guatemala cosechado a los 45 días obtuvo la relación hoja: tallo más alta (4.64). Los mayores contenidos promedio de proteína (78.5 g kg-1) y fósforo (1.22 g kg-1) se obtuvieron a los 45 días. Se concluye que las gramíneas cosechadas a los 70 días demuestran su potencial productivo con un valor nutritivo moderado, lo que podría ser utilizado para incrementar el rendimiento por unidad de área. Además, el pasto Guatemala podría ser utilizado en estudios con animales en pastoreo debido a su alta relación hoja: tallo y valor nutritivo moderado.
Ganancia de peso de toretes cruzados (Bos taurus con Bos indicus) en sistemas intensivos del trópico
(Universidad de Tarapacá, 2023-09-01) Linares Rivera, Jaime Lizardo; Leveau Villacorta, Cayo; Farje Alva, Kennedy Pacífico; Ampuero Trigoso, Gustavo; Milla Pino, Manuel Emilio; Saucedo Uriarte, José Américo
El objetivo del estudio fue evaluar la ganancia de peso de toretes cruzados (Bos taurus con Bos indicus) en sistemas intensivos en el trópico del Perú. Un total de 20 toretes de 11 meses de edad con peso promedio de 155,7 ± 25,9 kg fueron distribuidos aleatoriamente en dos tratamientos. Un grupo recibió alimento balanceado y el otro se basó en pastoreo convencional. Se determinó el peso y ganancia de peso mensual. Se aplicó la prueba T-student para dos muestras independientes. Se encontraron diferencias significativas para pesos y ganancias de peso (p < 0,05), constatándose superioridad de peso en los animales que fueron alimentados con concentrado respecto a los bovinos que fueron pastoreados. En conclusión, a nivel de trópico los bovinos cruzados resultaron superiores en ganancia de peso, por lo que es necesario seguir mejorando los pastizales naturales, suplementar con concentrado a base de insumos locales y hacer evaluaciones con pastizales cultivados.
Morphological and productive correlations of cutting Pennisetum varieties under conditions of peruvian humid tropics
(Bogor Agricultural University, 2024-08-26) Pinchi Carbajal, Segundo Fidencio; Quispe Ccasa, Hurley Abel; Ampuero Trigoso, Gustavo; Nolasco Lozano, Emily; Saucedo Uriarte, Jose Américo
Livestock farming in the Peruvian tropics is based on the use of grazing forage, but cutting grasses offers greater productivity and seasonality advantages. In this study, the morphological and productive characteristics of King Grass Morado (KGM), Cuba OM-22 (CU), and Maralfalfa (MA) were evaluated and correlated with chlorophyll content under Peruvian humid tropic conditions. Five plots of 1 ha each were installed for the three Pennisetum varieties (2-1-2), with three samples per plot. No significant differences were found in plant height, leaf length, number of nodes, number of leaves/stem, number of stems, stem circumference, length of nodes, leaf, stems, and total weight, chlorophyll index (atLEAF CLOR), performance index (API), and dry matter. KGM stood out in tillering (12.86) (p<0.01), but CU and MA showed greater leaf width (4.16 and 4.42 cm, respectively) (p<0.05). The calculated biomass production was 40.3 t/ha for KGM, 24.5 t/ha for MA, and 76.5 t/ha for CU. MA had higher nitrogen (0.70%) and protein (4.33%) contents (p<0.01). The correlations were significant between stem height with the number of nodes and leaf width, stem circumference with stem, leaf, and total weight (p<0.05), and nitrogen and protein content were estimated with the atLEAF CLOR and API values of the basal leaves with R2 = 0.548 and R2 = 0.563, respectively (p<0.05). In conclusion, KGM, CU, and MA differed in some morphological and productive variables and were correlated with others; furthermore, the protein content could be estimated with the atLEAF CLOR and API values in these Pennisetum varieties.
Seroprevalence of reproductive and infectious diseases in cattle: the case of Madre de Dios in the Peruvian southeastern tropics
(American Veterinary Medical Association, 2024-02-12) León Trinidad, Silvia Eliana; Barrantes Bravo, Christian; Feijoo Narvasta, Shefferson Gilbert Wilson; Huamán Fuertes, Ethel; Ampuero Trigoso, Gustavo; Canto Sáenz, Francys Mitchel; Quispe Ccasa, Hurley Abel
OBJECTIVE The objective of this study was to determine the seroprevalence of reproductive and infectious diseases in tropical cattle in the Tambopata and Tahuamanu Provinces in the department of Madre de Dios, Peru. SAMPLE 156 bovines from 7 cattle farms were sampled. These farms used exclusive grazing for food and natural mating for reproduction and did not have sanitary or vaccination programs. METHODS The serum of blood samples was subjected to ELISA with commercial kits for the detection of antibodies against Neospora caninum, Mycobacterium avium subsp paratuberculosis (MAP), Leptospira interrogans, pestivirus bovine viral diarrhea virus-1, retrovirus bovine leukemia virus (BLV), orbivirus bluetongue virus (BTV), and herpesvirus bovine herpes virus-1 (BHV). The data were analyzed by means of association tests with χ2 (P < .05) and Spearman rank correlation (P < .05) in the SPSS v.15.0 software (IBM Corp). RESULTS A low prevalence of antibodies to L interrogans, N caninum, M avium subsp paratuberculosis, bovine viral diarrhea virus-1 was found, but it was high to BTV, BLV, and BHV (100%, 53.85%, and 72.44%, respectively). The presence of BLV and BHV was higher in the Las Piedras District, bovines less than 5 years old, and cattle with breed characteristics of zebu and crossbred (P < .01). In addition, there was a significant correlation between both infections, showing 83.3% of BLV positivity that were also BHV positive (P < .01). CLINICAL RELEVANCE The high prevalence of antibodies to BTV, BHV, and BLV could be due to livestock management practices, direct con tact with infected animals, and variation of the presence of vectors and natural reservoirs in the context of climate change in the tropics.
Sustainability of livestock farms: The case of the district of Moyobamba, Peru
(Elsevier, 2023-01-21) Durand Chávez, Luz Marlene; Quispe Ccasa, Hurley Abel; Linares Rivera, Jaime Lizardo; Segura Portocarrero, Gleni Tatiana; Calderón Tito, René; Vásquez Pérez, Héctor Vladimir; Maicelo Quintana, Jorge Luis; Ampuero Trigoso, Gustavo; Robles Rodríguez, Rafael René; Saucedo Uriarte, José Américo
The Peruvian Amazon is a geographical area with great biodiversity, where the main economic activities are agricultural crops and grazing animals. The evaluation of sustainability in production systems is based on the analysis of economic, environmental and social components, which are variable between production units or livestock farms. The classification of livestock farms based on their characteristics of similarity and differences can contribute to the most appropriate assessment of their level of sustainability. The objective of this research was to determine the level of sustainability of livestock farms in the district of Moyobamba, San Martín, Peru, based on environmental, economic and social criteria. The research was carried out from November 2018 to February 2019 with a survey of a sample of 60 livestock farms out of a population of 2220. A survey-type form and data collection in the field were applied, adapting a methodology that proposes inferring on 33 indicators grouped into six criteria: three environmental criteria (soil quality, pasture health and animal quality), two economic criteria (farm system and farm economy), and a social criterion of the farm. A scale from 1 to 10 was used to assess the condition of each indicator. The typification of farms was carried out through a Conglomerate Analysis. To analyze the level of sustainability, Amoeba graphs were constructed for each defined farm group. Qualitative variables were analyzed with contingency tables and quantitative variables using the T test (p < 0.05). Three types of livestock farms were identified, differentiated by level of education, farm size, years in cattle raising and number of cattle heads (p < 0.05), where Group 1 is less experienced, Group 1 has more area and cattle, and Group 3 only have older years in livestock. There were significant differences between the evaluated criteria and the sustainability index. From the typification of livestock farms, Group 2 (13 farms) presented a higher level of sustainability as did Group 3 (16 farms), while Group 1 (31 farms).