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19 resultados encontrados para: AUTOR: Ayala Burgos, Armín Javier
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Resumen en: Español | Inglés |
Resumen en español

Los rumiantes contribuyen significativamente a las emisiones de metano en las regiones tropicales. Sin embargo, hay pocas instalaciones disponibles para la medición in vivo de estas emisiones. Por lo anterior, el objetivo del presente trabajo fue describir el diseño, construcción y operación de cámaras de respiración para la medición in vivo de la producción de metano de bovinos en México. En la construcción se utilizaron materiales disponibles localmente. Las paredes, el techo y las puertas se construyeron de paneles térmicos con dos ventanas de acrílico, en ambos lados, en la parte delantera. Las cámaras tienen un volumen de aire de 9.97 m³. El aire de la cámara se extrae con una bomba de flujo de masas a una velocidad de 500 L/min. El metano mezclado en las muestras de aire se cuantificó con un analizador de infrarrojo. Las cámaras funcionan bajo presión negativa de -500 Pa. La temperatura y humedad relativa se mantiene a 23 °C y 55 %, respectivamente. El funcionamiento de las cámaras se evaluó utilizando ganado Bos indicus, de la raza Nelore, alimentado con pasto de Taiwán (Pennisetum purpureum) y un concentrado con 18 % de proteína cruda; y se realizaron mediciones con las cámaras durante 23 h. La producción de metano fue de 173.2 L/día, mientras que el factor de emisión fue de 17.48 L de metano/kg de materia seca consumida. Se concluye que las cámaras de respiración pueden medir con precisión la producción de metano en ganado Nelore consumiendo raciones tropicales.

Resumen en inglés

Ruminant animals contribute significantly to methane emissions in tropical regions. Nonetheless, there are few facilities available in those regions of the world for in vivo measurement of methane production in cattle. The aim of the present work was to describe the design, construction and operation of respiration chambers for in vivo measurement of methane production in cattle in Mexico. Locally available materials were used in the construction. Walls, roof and doors were constructed of thermic panels with two windows of acrylic at the front so the animal can be observed at all times. Chambers have an air volume of 9.97 m³. Air is drawn from the chamber at a rate of 500 L/min by the effect of mass action flow generators. Methane was measured in air samples with an infrared analyzer. Chambers operate under a slight negative pressure of around -500 Pa. Air temperature inside the chambers is kept at 23 °C with an air conditioner, while relative humidity is maintained at 55 % with a dehumidifier. Functioning of the chambers was evaluated in Bos indicus, Nelore cattle fed Taiwan grass (Pennisetum purpureum) and a concentrate (18 % crude protein), and measurements were made during runs of 23 h duration. Methane production was on average 173.2 L per day, while the emission factor was 17.48 L methane per kilogram o dry matter consumed. It concludes that this respiration facility is capable of measuring methane production accurately in cattle fed tropical rations.


Resumen en: Inglés |
Resumen en inglés

The objective of this study was to determine methane (CH4) yield by crossbred cattle fed tropical grasses. A total of 66 individual determinations of dry matter intake (DMI) and 42 determinations of organic matter intake (OMI) in relation to the production of enteric CH4 were carried out. Methane measurements in heifers were performed in open-circuit respiration chambers. Heifers (Bos indicus×B. taurus) with an average live weight of 288.5 ± 55.7 kg fed tropical grasses as basal ration were used. An average intake of 8.22 and 7.80 kg of DM and OM per day were recorded. An average enteric CH4 production of 88.0 g/heifer/day was determined. It was found that DMI and OMI in relation to CH4 production have a coefficient of determination (R²) of 0.73 and 0.70 respectively, to predict CH4 emissions. It is concluded that the methane yield (18.07 g CH4/kg DM intake) predicted by regressing DM intake against methane production represents a reliable value to be used for the estimation of enteric CH4 inventories for cattle grazing in the tropical regions of Mexico.


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Capítulo de libro
Efecto de mezclas de follajes de ramón (Brosimum alicastrum) y tzalam (Lysiloma latisiliquum) en la digestabilidad y el consumo de ovinos
Ayala Burgos, Armín Javier (autor) ; Ramírez Avilés, Luis (autor) ; Castro González, Abigail (autor) ; Alayón Gamboa, José Armando (autor) ;
Disponible en línea
Contenido en: III reunión nacional sobre sistemas agro y silvopastoriles: memoria [Disco compacto] Texcoco, Estado de México, México : Universidad Autónoma Chapingo : Universidad Autónoma Metropolitana : El Colegio de la Frontera Sur, 2006 páginas 1-17
Bibliotecas: San Cristóbal
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SIBE San Cristóbal
43913-10 (Disponible)
Disponibles para prestamo: 1

4.
Capítulo de libro

5.
Capítulo de libro - Memoria en extenso sin arbitraje
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Efecto del fruto molido de Enterolobium cyclocarpum Jacq Griseb. sobre la población de protozoarios y la producción de metano en el rumen de ovinos de pelo
Ayala Burgos, Armín Javier ; Albores Moreno, Samuel (coaut.) ; Alayón Gamboa, José Armando (coaut.) ; Aguilar Pérez, Carlos Fernando (coaut.) ; Solorio Sánchez, Francisco Javier (coaut.) ; Ramírez Avilés, Luis (coaut.) ; Magaña Monforte, Juan (coaut.) ; Ku Vera, Juan Carlos (coaut.) ;
Contenido en: Primera conferencia de gases de efecto invernadero en sistemas agropecuarios de Latinoamérica Osorno, Chile : Instituto de Investigaciones Agropecuarias : Ministerio de Agricultura, 2014 No. 54, p. 105-160 ISSN: 0717-4810
Nota: Solicítelo con su bibliotecario/a

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Resumen en: Inglés |
Resumen en inglés

Objective: The aim of the experiment was to assess the effect of increasing amounts of Leucaena leucocephala forage on dry matter intake (DMI), organic matter intake (OMI), enteric methane production, rumen fermentation pattern and protozoa population in cattle fed Pennisetum purpureum and housed in respiration chambers. Methods: Five crossbred heifers (Bos taurus×Bos indicus) (BW: 295±6 kg) were fed chopped P. purpureum grass and increasing levels of L. leucocephala (0%, 20%, 40%, 60%, and 80% of dry matter [DM]) in a 5×5 Latin square design. Results: The voluntary intake and methane production were measured for 23 h per day in respiration chambers; molar proportions of volatile fatty acids (VFAs) were determined at 6 h postprandial period. Molar concentration of VFAs in rumen liquor were similar (p>0.05) between treatments. However, methane production decreased linearly (p<0.005), recording a maximum reduction of up to ∼61% with 80% of DM incorporation of L. leucocephala in the ration and no changes (p>0.05) in rumen protozoa population were found. Conclusion: Inclusion of 80% of L. leucocephala in the diet of heifers fed low-quality tropical forages has the capacity to reduce up to 61.3% enteric methane emission without affecting DMI, OMI, and protozoa population in rumen liquor.


Resumen en: Inglés |
Resumen en inglés

The aim of the work was to determine the effect of increasing concentrations of saponins from Yucca schidigera in the diet on voluntary intake, rumen fermentation and methane (CH4) production in Pelibuey sheep fed a tropical grass Pennisetum purpureum. Five male sheep (32.2 ± 1.1 kg liveweight) were fed chopped P. purpureum grass in a 5 × 5 Latin square design. Sheep were supplemented with 0.0, 1.5, 3.0, 4.5 or 6.0 g per day of saponins from Y. schidigera mixed with ground corn, before the grass was offered. Feed intake, feed refusal and total faecal output were recorded for 20 days of the adaptation period and 5 days of the experimental period. Apparent digestibility of dry matter (DMD), organic matter (OMD), neutral detergent fibre (NDFD) and acid detergent fibre (ADFD) were determined. Ruminal methane emission was estimated using stoichiometric balance and the molar proportion of volatile fatty acids was determined by gas chromatography. Voluntary intake, DMD, OMD, NDFD, ADFD, volatile fatty acids and CH4 emission were not affected (P > 0.05) by increasing inclusion levels of saponins in the ration of sheep. Nonetheless, CH4 production increased as the voluntary intake of NDF augmented. Addition of 6 g of saponins per day as a supplement to Pelibuey sheep fed a tropical grass did not affect voluntary intake and digestibility of DM, OM, NDF and ADF, or ruminal methane production.


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Resumen en: Español | Inglés |
Resumen en español

El objetivo del trabajo fue evaluar el efecto de la incorporación de diferentes fuentes de saponinas sobre la producción total de gas in vitro (GT) y la producción de metano ruminal (CH4), la cinética de fermentación, la digestibilidad de materia seca (DIVMS) y digestibilidad de la materia orgánica (DIVMO). Los tratamientos evauados fueron la interacción de tres concentraciones (3.5, 7.0 y 14.0 mg/g de materia seca) de saponinas de Yucca schidigera (YS), Gliricidia sepium (GS), Enterolobium cyclocarpum (EC) y un control (Pennisetum purpureum [PP] solo). Se incubó una muestra de 1,0 g de cada tratamiento in vitro en un diseño completamente al azar con arreglo factorial con tres repeticiones por tratamiento. GT de PP no se vio afectado (P> 0.05) por la inclusión de saponinas de YS, GS y EC. La producción de metano no fue afectada (P> 0.05) por ningún nivel de inclusión de saponinas de YS. Cuando las saponinas de GS y EC se incorporaron a concentraciones de 7.0 y 14.0 mg/g de MS, la producción de metano se incrementó (P <0,05). DIVMS y DIVMO aumentaron significativamente (P <0.05) con todas las fuentes de saponinas, excepto con las de YS a una concentración de 14 mg/g de MS cuando la DIVMO se redujo (P <0.05). Se concluye que las saponinas de las diferentes plantas tropicales no redujeron la producción de metano en condiciones in vitro.

Resumen en inglés

The aim of the work was to assess the effect of incorporation of different sources of saponins on the in vitro total gas (TG) and ruminal methane (CH4) productions, kinetics of fermentation, digestibility of dry matter (IVDDM) and organic matter (IVDOM). Treatments were interaction of three concentrations (3.5, 7.0 and 14.0 mg/g dry matter) of saponins from Yucca schidigera (YS), Gliricidia sepium (GS), Enterolobium cyclocarpum (EC) and a control (Pennisetum purpureum [PP] alone). A sample of 1.0 g of each treatment was incubated in vitro in a complete randomized design with factorial arrangement with three replicates per treatment. TG from PP was unaffected (P>0.05) by the inclusion of saponins from YS, GS and EC. Methane production was not affected (P>0.05) by any saponins from YS at any level of inclusion. When saponins from GS and EC were incorporated at concentrations of 7.0 and 14.0 mg/g DM, methane production was increased (P<0.05). IVDDM and IVDOM were significantly increased (P<0.05) with all sources of saponins, except with those from YS at concentration of 14.0 mg/g DM when IVDOM was reduced (P<0.05). It is concluded that saponins from different tropical plants did not reduce methane production under in vitro conditions.


9.
Artículo
Effects of brosimum alicastrum and Lysiloma latisiliquum mixtures on voluntary intake, nutrient digestibility and nitrogen balance in sheep fed tropical pastures
Castro González, A. (coaut.) ; Alayón Gamboa, José Armando (coaut.) ; Ayala Burgos, Armín Javier (coaut.) ; Ramírez Avilés, Luis (coaut.) ;
Clasificación: AR/636.3097265 / E3
Contenido en: Animal Feed Science and Technology Vol. 141, no. 3-4 (April 2008), p. 246-258 ISSN: 0377-8401
Cerrar
SIBE Campeche
ECO040003293 (Disponible)
Disponibles para prestamo: 1
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SIBE Chetumal
ECO030007079 (Disponible)
Disponibles para prestamo: 1
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SIBE San Cristóbal
ECO010011513 (Disponible)
Disponibles para prestamo: 1
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SIBE Tapachula
ECO020012104 (Disponible)
Disponibles para prestamo: 1
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SIBE Villahermosa
ECO050003364 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

Effects of supplementing tree foliage mixtures on voluntary intake, apparent digestibility and N balance was evaluated using Pelibuey sheep fed low quality diets. Five treatments were examined in a 5 x 5 Latin square design, which consisted of a basal diet of grass (Sorghum halepense) hay supplemented with Brosimum alicastrum (B) and Lysiloma latisiliquum (L) at the following rates (g DM/kg diet): B264, L0; B198, L66; B132, L132; B66, L198 and B0, L264. Additionally, an in situ degradability evaluation was completed with two ruminally cannulated cows. Neutral detergent fibre (NDF), acid detergent insoluble N (ADIN), lignin(sa) and total phenols (TP) were higher (P<0.01) in L. latisiliquum versus B. alicastrum. Daily intake (g/kg LW0.75/day) of DM (from 98 to 73) and OM (from 88 to 66) decreased quadratically (P<0.01), whereas CP (from 8.0 to 5.6) and ME (from 7.7 to 5.2, MJ/sheep/day) reduced linearly (P<0.01), as L. latisiliquum increased in the diet. Apparent digestibility of DM (from 0.486 to 0.445), OM (from 0.511 to 0.458) and CP (from 0.417 to 0.198) decreased linearly (P<0.01) and was associated with a low ruminal in situ CP degradability of L. latisiliquum. The decrease in N intake and digestibility induced lower (P<0.01) N retention (from 2.7 to 0.1 g/sheep/day). Although the incremental substitution of B. alicastrum withL. latisiliquum negatively affected intake, rumen degradation, digestibility and N balance, results indicate that this foliage mixture, but with no more than 132 g DM/kg diet of L. latisiliquum, could be used as a supplementation strategy to sheep fed low quality forage without negative effects on voluntary intake.


10.
Artículo
Resumen en: Inglés |
Resumen en inglés

An experiment was carried out to determine the effect of supplementing ground pods of Enterolobium cyclocarpum in a basal ration of Pennisetum purpureum grass on feed intake, rumen volatile fatty acids (VFAs), and protozoa and methane (CH 4) production by hair sheep. Four male sheep (Pelibuey × Katahdin) with a mean live weight of 27.0 kg (SD ± 0.5) were supplemented with 0.00, 0.15, 0.30, and 0.45 kg of dry matter (DM) of E. cyclocarpum pods daily; equivalent to 0.00, 4.35, 8.70, and 13.05 g of crude saponins, respectively. Dry matter intake (DMI), organic matter intake (OMI), and molar proportions of propionic acid increased linearly (P <0.05) as pods of E. cyclocarpum in the ration were increased. Higher intakes of DM and OM were found when lambs were fed 0.45 kg DM per day of E. cyclocarpum , and the highest proportion of propionic acid (0.21 and 0.22, respectively) was obtained with 0.15 and 0.30 kg of DM per lamb of E. cyclocarpum, while apparent digestibility of neutral detergent fiber (NDF) and molar proportion of acetic acid were reduced (P <0.05). Rumen CH 4 production decreased (P < 0.05) when 0.30 and 0.45 kg of DM/lamb/day of E. cyclocarpum were fed (21.8 and 25.3 L CH 4/lamb/day, respectively). These results suggest that to improve the feeding of sheep fed tropical grass, it is advisable to supplement the basal ration with up to 0.30 kg DM of E. cyclocarpum pods.