Modificación del nivel y tipo de fibra en piensos de cerdos mediante la inclusión de subproductos agroindustriales sobre las características del purín y su potencial de producción de amoniaco, biogás y metano (resultados preliminares)

La alimentación de los animales se considera una vía importante de mitigación de la emisión de gases contaminantes a la atmósfera, principalmente amoniaco (NH3) y metano (CH4), (BREF, 2006). La incorporación de fuentes de fibra fácilmente fermentable poco lignificada en piensos es capaz de modificar el comportamiento fermentativo de las bacterias en el intestino grueso y el balance entre el nitrógeno (N) orgánico e inorgánico y el pH de las deyecciones (Portejoie y col., 2004; Jarret y col., 2011). Este efecto, que no altera la excreción total de N puede condicionar considerablemente a la emisión de NH3. Por otro lado, el efecto de la inclusión de fuentes de fibra en la dieta sobre las emisiones de CH4 ha sido menos estudiado. Algunos estudios sugieren que un incremento de la cantidad de fibra en los piensos puede aumentar la producción de CH4 por cerdo y día (Jarret y col., 2011) al reducir la digestibilidad de los nutrientes e incrementar la cantidad de materia orgánica no digerida en las heces. El objetivo del presente estudio es evaluar los efectos de las variaciones en el nivel y tipo de fibra (fermentable y no fermentable) de los piensos sobre las características del purín y las emisiones de NH3,CH4 y Biogás

The effect of slurry composition on methane potential emissions from fattening pig slurries: a review of three nutrition assays

This study reviews the effects of pig slurry composition on the biochemical methane (CH4) potential (B0), using the information collected in three nutrition assays. A total of 84 animals were used to test the effect of 13 different diets

Effect of enzyme complex (carbohydrase and Phytase) in laying hens diets

O presente experimento foi conduzido para avaliar o uso de enzimas fitase e carbohidrolase em dietas a base de milho e soja com ou sem alta concentração de fibras no desempenho produtivo e qualidade dos ovos (gravidade especifica (GE), unidade haugh (UH), espessura da casca (EC) e peso da casca (PC) de galinhas poedeiras. Foram utilizadas 320 poedeiras da linhagem comercial Hissex White, com idade inicial de 44 semanas. As aves foram alimentadas com quatro diferentes tratamentos (10 repetições de 8 cada) durante 10 semanas. As dietas incluíam: controle (T-1) a base de milho e soja com baixa concentração de fibras; (T-2) a base de milho e soja com alta concentração de fibras; (T-3) a base de milho e soja com adição do complexo enzimático e (T-4) a base de milho e soja com adição do complexo enzimático e alta concentração de fibras. As galinhas alimentadas com a dieta controle, apresentaram maior consumo de ração (CR) (P<0,05) na primeira e na quinta semanas em relação ao controle negativo (T-2). Somente na quinta semana o grupo controle obteve maior conversão alimentar (CA) (P<0,05) em relação aos outros tratamentos. Nas outras variáveis observadas, como o peso dos ovos (PO), a massa dos ovos (MO), gravidade específica (GE), unidade Haugh (UH), espessura da casca (EC) e peso da casca (PC), os diferentes tratamentos determinaram resultados similares, isso pode indicar que dietas com alta concentração de fibras e por isso de baixo custo, podem ser adotadas sem diminuição da qualidade e produção dos ovos.The present experiment was conducted to evaluate the use of enzymes phytase and carbohydrase in corn/soybean meal diets with or without fibers regarding the productive performance and egg quality (specific gravity (SG), Haugh unit (HU), shell thickness (ST) and shell weight (SW) of laying hens. Were utilized 320 commercial line Hissex White laying hens, aged 44 weeks. The hens were fed with four different treatments (10 replicates of eight each) during 10 weeks. The diets included control (T-1) based of corn, soybean meal and low concentration of fibers; (T-2) based of corn, soybean meal and high concentration of fibers; (T-3) based of maize and soybean meal supplemented with enzymes and (T-4) based of corn and soybean meal supplemented with enzymes and high concentration of fibers. The laying hens fed with the control diet (T-1) showed higher feed intake (FI) (P<0,05) in the first and fifth weeks in relation to the negative control (T-2). Only in the fifth week the control group had higher feed conversion (FC) (P<0,05) in relation with the other treatments. In the other variables observed, the different treatments showed similar results, it may indicate that diets with high fiber concentration and therefore low cost can be taken without decreasing the quality and egg production

Ammonia and methane gas emissions from pig slurry: variability induced through feeding strategies

Esta Tesis doctoral fue desarrollada para estudiar las emisiones de amoniaco (NH3) y metano (CH4) en purines de cerdos, y los efectos ocasionados por cambios en la formulación de la dieta. Con este propósito, fueron llevados a cabo tres estudios. El experimento 1 fue realizado con el objetivo de analizar los factores de variación de la composición de purines y establecer ecuaciones de predicción para emisiones potenciales de NH3 y CH4. Fueron recogidas setenta y nueve muestras de piensos y purines durante dos estaciones del año (verano y invierno) de granjas comerciales situadas en dos regiones de España (Centro y Mediterráneo). Se muestrearon granjas de gestación, maternidad, lactación y cebo. Se determinó la composición de piensos y purines, y la emisión potencial de NH3 y CH4. El contenido de nutrientes de los piensos fue usado como covariable en el análisis. La espectroscopia de reflectancia del infrarrojo cercano (NIRS) se evaluó como herramienta de predicción de la composición y potencial emisión de gases del purín. Se encontró una amplia variabilidad en la composición de piensos y purines. Las granjas del Mediterráneo tenían mayor pH (PDDGST>SOJ (desde 0,171 hasta 0,109 y 0,086, respectivamente) en paralelo a la disminución del potencial de emisión de CH4 por g de SV del purín (desde 301 a 269 y 256 mL, respectivamente). Todos los purines obtenidos en estos tres experimentos y Antezana et al. (2015) fueron usados para desarrollar nuevas calibraciones con la tecnología NIRS, para predecir la composición del purín y el potencial de las emisiones de gases. Se observó una buena precisión (R2cv superior a 0,92) de las calibraciones cuando muestras de los ensayos controlados (2, 3 y Antezana et al., 2015) fueron añadidas, aumentando el rango de variación. Una menor exactitud fue observada para TAN y emisiones de NH3 y CH4, lo que podría explicarse por una menor homogeneidad en la distribución de las muestras cuando se amplía el rango de variación del estudio. ABSTRACT This PhD thesis was developed to study the emissions of ammonia (NH3) and methane (CH4) from pig slurry and the effects caused by changes on diet formulation. For these proposes three studies were conducted. Experiment 1 aimed to analyse several factors of variation of slurry composition and to establish prediction equations for potential CH4 and NH3 emissions. Seventy-nine feed and slurry samples were collected at two seasons (summer and winter) from commercial pig farms sited at two Spanish regions (Centre and Mediterranean). Nursery, growing-fattening, gestating and lactating facilities were sampled. Feed and slurry composition were determined, and potential CH4 and NH3 emissions measured. Feed nutrient contents were used as covariates in the analysis. Near infrared reflectance spectroscopy (NIRS) was evaluated as a predicting tool for slurry composition and potential gaseous emissions. A wide variability was found both in feed and slurry composition. Mediterranean farms had a higher pH (PWDDGS>SB (from 0.171 to 0.109 and 0.086, respectively) in parallel to a decrease of biochemical CH4 potential per g of VS of slurry (from 301 to 269 and 256 ml, respectively). All slurry samples obtained from these three experiments and Antezana et al. (2015) were used to develop new calibrations with NIRS technology, to predict the slurry composition and potential gaseous emissions of samples with greater variability in comparison to experiment 1. Better accuracy (R2cv above 0.92) was observed for calibrations when samples from controlled trials experiments (2, 3 and Antezana et al., 2015) were included, increasing the range of variation. A lower accuracy was observed for TAN, NH3 and CH4 gaseous emissions, which might be explained by the less homogeneous distribution with a wider range of data

Effects of nutrition on digestion efficiency and gaseous emissions from slurry in growing pigs: II. Effect of protein source in practical diets

This research aimed to investigate effects of protein source in practical diets on nutrient excretion and potential emissions of ammonia (NH3) and methane (CH4) in pigs. Three experimental feeds were designed to substitute a mixture of soybean meal and soybean hulls (SB diet) with sunflower meal (SFM) or wheat DDGS (WDDGS). The proportion of other ingredients was also modified in order to maintain similar nutrient contents across diets. Changes in protein source led to differences in dietary content of neutral detergent insoluble crude protein, soluble fibre (SF) and acid detergent lignin. Twenty-four pigs (8 per diet), weighing 52.3 or 60.8 kg at the first and second batch, respectively, were housed individually in metabolic pens to determine during a 7-day period dry matter (DM) balance, coefficients of total tract apparent digestibility (MAD) of nutrients, and faecal and urine composition. Representative slurry samples from each animal were used to measure NH3 and CH4 emissions over an 11 and/or 100-day storage period, respectively. Neither DM intake, nor DM or energy CTTAD differed among experimental diets, but type of feed affected (P WDDGS > SB (from 0.171 to 0.109 and 0.086, respectively) in parallel to a decrease of potential CH4 emission per g of OM of slurry (from 301 to 269 and 256 mL, respectively). When both gaseous emissions were expressed per animal and day, differences followed the same trend, but did not reach significant levels. (C) 2015 Elsevier B.V. All rights reserved.This project was funded by the Spanish Ministry of Science and Innovation (AGL2011-30023) and the Valencian Government (ACOMP/2013/118). We also thank CAPES Foundation, Ministry of Education of Brazil, Brasilia - DF 70040-020, Brazil for a research fellowship grant.Beccaccia, A.; Cerisuelo García, A.; Calvet Sanz, S.; Ferrer Riera, P.; Estellés, F.; Blas, CD.; Garcia-Rebollar, P. (2015). Effects of nutrition on digestion efficiency and gaseous emissions from slurry in growing pigs: II. Effect of protein source in practical diets. Animal Feed Science and Technology. 209:137-144. https://doi.org/10.1016/j.anifeedsci.2015.07.02113714420