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Listar por autor "Fernández Martínez, Carlos Javier"

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Alterations in Energy Partitioning and Methane Emissions in Murciano-Granadina Goats Fed Orange Leaves and Rice Straw as a Replacement for Beet Pulp and Barley Straw

Romero Rueda, Tamara; Palomares Carrasco, José Luis; Moya, V.J.; Loor, Juan J.; Fernández Martínez, Carlos Javier (MDPI AG, 2021-01)

[EN] Reducing methane emissions in ruminants with the recycling of agro-industrial by-products is of great importance today. Pruning waste from citrus trees is currently burned or incorporated into soil. Regarding rice ...
An Open-Circuit Indirect Calorimetry Head Hood System for Measuring Methane Emission and Energy Metabolism in Small Ruminants

Fernández Martínez, Carlos Javier; Gomis-Tena Dolz, Julio; Hernández Ferrer, Alberto; Saiz Rodríguez, Francisco Javier (MDPI AG, 2019-06-21)

[EN] Methane (CH4) is a natural by-product of microbial fermentation in the rumen and is a powerful greenhouse gas. An open-circuit indirect calorimetry system for continuous determination of CH4 and CO2 production and O-2 ...
Application of an open circuit indirect calorimetry system for gaseous exchange measurements in small ruminant nutrition

Criscioni Ferreira, Patricia Fabiola (Universitat Politècnica de València, 2016-05-16)

[EN] The main objective of this Thesis was to study the energy metabolism in small ruminants under different nutrition sceneries. As methodology we utilized indirect calorimetry instead of direct calorimetry or feeding ...
Body condition alters glutathione and nuclear factor erythroid 2-like 2 (NFE2L2)-related antioxidant network abundance in subcutaneous adipose tissue of periparturient Holstein cows

Liang, Y.; Alharthi, A.S.; Bucktrout, R.; Elolimy, A.A.; Lopreiato, V.; Martinez-Cortes, I.; Xu, C.; Fernández Martínez, Carlos Javier; Trevisi, E.; Loor, J.J. (American Dairy Science Association, 2020-07)

[EN] Dairy cows with high body condition score (BCS) in late prepartum are more susceptible to oxidative stress (OS). Nuclear factor erythroid 2-like 2 (NFE2L2) is a major antioxidant transcription factor. We investigated ...
Changes in heat production by sheep of Guirra breed after increase in quantity of barley grain on the diet

López Luján, Mª del Carmen; Fernández Martínez, Carlos Javier (Elsevier, 2013-01)

The heat production (HP) from CH4 and CO2 production and O-2 consumption was determined by the respirometry quotient (RQ) method and by C-N balance measurements (CN method). Twelve dry and none pregnant Guirras sheep were ...
Changes in nutrient balance, methane emissions, physiologic biomarkers, and production performance in goats fed different forage-to-concentrate ratios during lactation

Fernández Martínez, Carlos Javier; Hernández, Alberto; Gomis-Tena Dolz, Julio; Loor, Juan J. (American Society of Animal Science, 2021-07-01)

[EN] The objective was to determine the effect forage-to-concentrate (F:C) ratio and stage of lactation on methane emissions, digestibility, nutrient balance, lactation performance, and metabolic responses in lactating ...
Characterizacion of Segureña sheep production system in the area of Sierra del Segura y la Sagra, Spain

Navarro-Ríos, M.J.; Marín-Bernal, A.M.; Martí, A.; Fernández Martínez, Carlos Javier (CIHEAM, 2011)

[FR] Le présent article se propose d¿analyser les caractéristiques les plus saillantes du secteur ovin dans une partie de la zone géographique sous Indication Géographique Protégée (IGP) "Cordero de Segura y la Sagra". Une ...
Description and function of a mobile open-circuit respirometry system to measure gas exchange in small ruminants

Fernández Martínez, Carlos Javier; López Luján, Mª del Carmen; Lachica, M. (ELSEVIER SCIENCE BV, 2012)

A mobile open-circuit respirometry system was constructed for estimating heat production (HP) in small ruminants from CH4 and CO2 production and 02 consumption by the respiratory quotient (RQ) method. The method was evaluated ...
DETERMINACIÓN DE LAS NECESIDADES DE MANTENIMIENTO EN DOS RAZAS DE OVEJAS AUTÓCTONAS ESPAÑOLAS; MANCHEGA Y GUIRRA

Raimundo Giménez, Ángeles (Universitat Politècnica de València, 2011-09-06)

SE UTILIZARON 12 OVEJAS (6MANCHEGAS-6GUIRRAS) QUE TRAS PASAR UNA FASE DE ADAPTACIÓN ( 13 DIAS) Y OTRA EXPERIMENTAL (13 DIAS) EN LA QUE SE REALIZARON MEDIDAS DE DIGESTIBILIDAD, BALANCES ENERGÍA Y RESPIROMETRÍA NO SE ...
Determinación de producción de metano en caprinos alimentados con dietas con distintos cereales

López Luján, Mª del Carmen; Ródenas Martínez, Luis; Piquer Querol, Olga; Cerisuelo, Alba; Cervera Fras, Mª Concepción; Fernández Martínez, Carlos Javier (Universidad de Córdoba, 2011-12)

Three primiparous 1.5 year old Murciano-Granadina female goats in maintenance were used. Their average body weight was 33.08 ± 2.1 kg. The objective was to determine methane production in two diets differing of the ...
Determination of the proportion of the ingested gross energy lost as exhaled methane by dairy goats consuming contrasting concentrate ingredients in mixed rations

López Luján, Mª del Carmen; Ródenas Martínez, Luis; Piquer Querol, Olga; Martinez-Paredes, Eugenio; Cerisuelo, A.; Cervera Fras, Mª Concepción; Fernández Martínez, Carlos Javier (NRC Research Press (Canadian Science Publishing), 2010-12)

[EN] Twelve 2-yr-old, dry Murciano-Granadina dairy goats were selected and divided into four equal groups based on similar body weight (38.41 +/- 0.78 kg). The four treatments were mixed diets with approximately 600 g ...
Development and evaluation of a mechanistic model of post-absorptive nitrogen partitioning in lactating goats

Fernández Martínez, Carlos Javier; Castro, J.J. (CSIRO Publishing, 2020)

[EN] Context. Goats contribute to global warming through emission of nitrous oxide from urine and faeces. To reduce nitrogen (N) excretion, improvements of N efficiency of goats is necessary. Aims. The aim of the present ...
Development of a dynamic energy-partitioning model for enteric methane emissions and milk production in goats using energy balance data from indirect calorimetry studies

Fernández Martínez, Carlos Javier; Hernando, I.; Moreno-Latorre, E.; Loor, J.J. (Cambridge University Press, 2020-08)

[EN] The main objective of this study was to develop a dynamic energy balance model for dairy goats to describe and quantify energy partitioning between energy used for work (milk) and that lost to the environment. Increasing ...
Development of a dynamic model for prediction of energy in milk protein, lactose, fat, and enteric methane emissions in goats based on energy balance and indirect calorimetry studies

Fernández Martínez, Carlos Javier; Loor, Juan J. (American Society of Animal Science, 2023-01-03)

[EN] Feed costs are overwhelmingly the largest expense for dairy producers. Thus, improving milk production efficiency (milk fat and protein are the main incomes for farmers) is of great economic importance in the dairy ...
Development of a Mobile Open-Circuit Respiration Head Hood System for Measuring Gas Exchange in Camelids in the Andean Plateau

Rios Rado, Wilfedo Manuel; Chipa Guillen, Paola Katherine; Huamán Borda, Dione; Velez Marroquin, Victor; Gere, José Ignacio; Antezana Julián, Walter Orestes; Fernández Martínez, Carlos Javier (MDPI AG, 2023-03)

[EN] Peru has the largest inventory of alpacas worldwide. Despite their importance as a source of net income for rural communities living at the Andean Plateau, data on energy requirements and methane (CH4) emissions for ...
Development of a mobile open-circuit system based on indirect calorimetry for energetic metabolism studies in small ruminants

LÓPEZ LUJÁN, MARÍA DEL CARMEN (Universitat Politècnica de València, 2016-04-28)

[EN] For many years energy needs of ruminants have tried to be known to formulate rations adjusted, but it has been found that there are a variety of factors that affect them. Therefore, lots of studies are needed for ...
Dynamic model development of enteric methane emission from goats based on energy balance measured in indirect open circuit respiration calorimeter

Fernández Martínez, Carlos Javier (Elsevier, 2018)

[EN] A dynamic model of methane (CH4) emission in goats was proposed and parameterized from energy balance experimental data. The model focused on dry matter intake and fat content of the diet as explanatory variables for ...
Efecto de dos niveles de almidón en la dieta sobre la producción de metano de cabras murciano-granadinas en lactación

Monllor Guerra, Paula (Universitat Politècnica de València, 2013-03-10)

[ES] 10 cabras en lactación con 2 dietas que difieren en el nivel de almidón. Se evaluó la producción de CH4 por intercambio respiratorio. La dieta con un 15% de almidón a penas disminuyó la producción de CH4 (4,06%) frente ...
Efecto de la dieta sobre la producción de metano en ganado caprino: resultados preliminares y puesta a punto de la metodología

López Luján, Mª del Carmen (Universitat Politècnica de València, 2011-07-22)

Se realizaron dos pruebas de digestibilidad mediante la administración de dos dietas que difirieron únicamente en el tipo de cereal (grano de cebada o maíz). La producción de metano y CO2, y el consumo de O2, se determinaron ...
Efecto de la incorporación de hoja de naranjo y paja de arroz en las dietas de ganado caprino sobre el rendimiento productivo

Rubio Oquendo, Adrián (Universitat Politècnica de València, 2019-10-04)

[ES] De un rebaño de 150 cabras de raza Murciano-Granadina en lactación se seleccionarán 10 cabras, de las cuales 5 comerán una dieta control y las otras 5 otra que incorpora paja de arroz y hoja de naranjo procedente de ...