Composition, potential emissions and agricultural value of pig slurry from Spanish commercial farms

[EN] Pig slurry is a valuable fertilizer for crop production but at the same time its management may pose environmental risks. Slurry samples were collected from 77 commercial farms of four animal categories (gestating and lactating sows, nursery piglets and growing pigs) and analyzed for macronutrients, micronutrients, heavy metals and volatile fatty acids. Emissions of ammonia (NH3) and biochemical methane potential (BMP) were quantified. Slurry electrical conductivity, pH, dry matter content and ash content were also determined. Data analysis included an analysis of correlations among variables, the development of predictionmodels for gaseousemissions and the analysis of nutritional content of slurries for crop production. Descriptive information is provided in this work and shows a wide range of variability in all studied variables. Animal category affected some physicochemical parameters, probably as a consequence of different slurry management and use of cleaning water. Slurries from gestating sows and growing pigs tended to be more concentrated in nutrients, whereas the slurry from lactating sows and nursery piglets tended to be more diluted. Relevant relationships were found among slurry characteristics expressed in fresh basis and gas emissions. Predictivemodels using on-farmmeasurable parameterswere obtained forNH3 (R2 = 0.51) andCH4 (R2 = 0.76), which suggests that BMP may be estimated in commercial farms from easily determined slurry characteristics. Finally, slurry nutrient composition was highly variable. Therefore, complete analyses of slurries should be performed for an effective and environmental friendly land application.This project was funded by the Spanish Ministry of Science and Innovation (AGL2011-30023) and the Valencian Government (ACOMP/2013/118). We thank the BABEL Project, Building Academic Bonds between Europe and Latin America. Erasmus Mundus Programme Action 2 for PhD fellowships. The translation of this paper was funded by the Universitat Politecnica de Valencia, Spain.Antezana-Julian, WO.; Blas, CD.; García-Rebollar, P.; Rodríguez, C.; Beccaccia, A.; Ferrer Riera, P.; Cerisuelo, A.... (2016). Composition, potential emissions and agricultural value of pig slurry from Spanish commercial farms. Nutrient Cycling in Agroecosystems. 104(2):159-173. https://doi.org/10.1007/s10705-016-9764-3S1591731042Aarnink AJA, Verstegen MWA (2007) Nutrition, key factor to reduce environmental load from pig production. Livest Sci 109(1–3):194–203Abubaker J, Risberg K, Jönsson E, Dahlin A S, Cederlund H, Pell M (2015) Short-term effects of biogas digestates and pig slurry application on soil microbial activity. Appl Environ Soil Sci. Article ID 658542: 1–15Adekunle KF, Okolie JA (2015) A review of biochemical process of anaerobic digestion. Adv Biosci Biotechnol 6:205–212Angelidaki I, Alves M, Bolzonella D, Borzacconi L, Campos JL, Guwy J, Kalyuzhnyi S, Jenicek P, Van Lier JB (2009) Defining the biomethane potential (BMP) of solid organic wastes and energy crops: a proposed protocol for batch assays. Water Sci Technol 59(5):927–934Antezana W, Calvet S, Beccaccia A, Ferrer P, De Blas C, García-Rebollar P, Cerisuelo A (2015) Effects of nutrition on digestion efficiency and gaseous emissions from slurry in growing pigs: III. Influence of varying the dietary level of calcium soap of palm fatty acids distillate with or without orange pulp supplementation. Anim Feed Sci Technol 209:128–136APHA (2005) Standard methods for the examination of water and wastewater. Centennial, BaltimoreBai ZH, Qin W, Chen Q, Oenema O, Zhang FS (2014) Changes in pig production in china and their effects on nitrogen and phosphorus use and losses. Environ Sci Technol 48:12742–12749Beccaccia A, Ferrer P, Ibáñez MA, Estellés F, Rodríguez C, Moset V, De Blas C, Calvet S, García-rebollar P (2015) Relationships among slurry characteristics and gaseous emissions at different types of commercial spanish pig farms. Span J Agric Res 13(1):1–15Conn KL, Topp E, Lazarovits G (2007) Factors influencing the concentration of volatile fatty acids, ammonia, and other nutrients in stored liquid pig manure. J Environ Qual 36(2):440–447Diacono M, Montemurro F (2010) Long-term effects of organic amendments on soil fertility. A review. Agron Sustain Dev 30:401–422. doi: 10.1051/agro/2009040Díez JA, Hernaiz P, Muñoz MJ, Torre A, Vallejo A (2006) Impact of pig slurry on soil properties, water salinization, nitrate leaching and crop yield in a four-year experiment in Central Spain. Soil Use Manag 20(4):444–450Dourmad J-Y, Jondreville C (2007) Impact of nutrition on nitrogen, phosphorus, Cu and Zn in pig manure, and on emissions of ammonia and odours. Livest Sci 112(3):192–198EUROSTAT (2015) Pig farming sector—statistical portrait. Pig Farming in the European Union: considerable variations from one member state to another. Statistics in Focus 15/2014. Author: Pol Marquer, Teresa Rabade, Roberta Forti ISSN:2314-9647, Catalogue number: KS-SF-14-015-EN-NFangueiro D, Lopes C, Surgy S, Vasconcelos E (2012a) Effect of the pig slurry separation techniques on the characteristics and potential availability of N to plants in the resulting liquid and solid fractions. Biosyst Eng 113(2):187–194Fangueiro D, Ribeiro H, Vasconcelos E, Coutinho J, Cabral F (2012b) Influence of animal slurries composition and relative particle size fractions on the C and N mineralization following soil incorporation. Biomass Bioenergy 47:50–51Ferrer P, Cambra-López M, Cerisuelo A, Peñaranda D, Moset V (2014) The use of agricultural substrates to improve methane yield in anaerobic co-digestion with pig slurry: effect of substrate type and inclusion level. Waste Manag 34:196–203Galassi G, Colombini S, Malagutti L, Crovetto GM, Rapetti L (2010) Effects of high fibre and low protein diets on performance, digestibility, nitrogen excretion and ammonia emission in the heavy pig. Anim Feed Sci Technol 161:3–4Gopalan P, Jensen PD, Batstone DJ (2013) Anaerobic digestion of swine effluent: impact of production stages. Biomass Bioenergy 48:121–129Hernández D, Fernández JM, Plaza C, Polo A (2007) Water-soluble organic matter and biological activity of a degraded soil amended with pig slurry. Sci Total Environ 378:101–103Hernández D, Polo A, Plaza C (2013) Long-term effects of pig slurry on barley yield and N use efficiency under semiarid mediterranean conditions. Eur J Agron 44:47–86Hristov AN, Oh J, Lee C, Meinen R, Montes F, Ott T, Firkins J, Rotz A, Dell C, Adesogan A, Yang W, Tricarico J, Kebreab E, Waghorn G, Dijkstra J, Oosting S (2013) Mitigation of greenhouse gas emissions in livestock production—A review of technical options for non-CO2 emissions. In: Gerber PJ, Henderson B, Makkar HPS (eds) FAO Animal Production and Health Paper No. 177. FAO, RomeIguácel F, Yagüe MR, Betrán J, Orús F (2011) Ensayos de Fertilización Con Purín Porcino, En Cereales de Invierno de Secano, Dirección General de Desarrollo Rural, Centro de Transferencia Agroalimentaria, Gobierno de Aragón. Informe Técnico 226:15Jarret G, Cerisuelo A, Peu P, Martinez J, Dourmad JY (2012) Impact of pig diets with different fibre contents on the composition of excreta and their gaseous emissions and anaerobic digestion. Agric Ecosyst Environ 160:51–58Jouany JP (1982) Volatile fatty acid and alcohol determination in digestive contents, silage juices, bacterial cultures and anaerobic fermentor contents. Sci Alimen 2:131–144Krupa SV (2003) Effects of atmospheric ammonia (NH3) on terrestrial vegetation: a review. Environ Pollut 124(2):179–221Mantovi P, Fumagalli L, Beretta GP, Guermandi M (2006) Nitrate leaching through the unsaturated zone following pig slurry applications. J Hydrol 316:1–4Martínez-Suller L, Azzellino A, Provolo G (2008) Analysis of livestock slurries from farms across Northern Italy: relationship between indicators and nutrient content. Biosyst Eng 99(4):540–552Moral R, Moreno-Caselles J, Perez-Murcia MD, Perez-Espinosa A, Rufete B, Paredes C (2005a) Characterisation of the organic matter pool in manures. Bioresour Technol 96(2):153–158Moral R, Perez-Murcia MD, Perez-Espinosa A, Moreno-Caselles J, Paredes C (2005b) Estimation of nutrient values of pig slurries in Southeast Spain using easily determined properties. Waste Manag 25(7):719–725Moral R, Perez-Murcia MD, Perez-Espinosa A, Moreno-Caselles J, Paredes C, Rufete B (2008) Salinity, organic content, micronutrients and heavy metals in pig slurries from South-Eastern Spain. Waste Manag 28(2):367–371Morazán H, Alvarez-Rodriguez J, Seradj AR, Balcells J, Babot D (2015) Trade-offs among growth performance, nutrient digestion and carcass traits when feeding low protein and/or high neutral-detergent fiber diets to growing-finishing pigs. Anim Feed Sci Technol 207:168–180Moset V, Cambra-López M, Estellés F, Torres AG, Cerisuelo A (2012) Evolution of chemical composition and gas emissions from aged pig slurry during outdoor storage with and without prior solid separation. Biosyst Eng 111(1):2–10Ndegwa PM, Vaddella VK, Hristov N, Joo HS (2009) Measuring concentrations of ammonia in ambient air or exhaust air stream using acid traps.  J Environ Qual 38(2):647–653Nicholson FA, Chambers BJ, Williams JR, Unwin RJ (1999) Heavy metal contents of livestock feeds and animal manures in England and Wales. Bioresour Technol 70(1):23–31Olusegun OS (2014) Influence of NPK 15-15-15 Fertilizer and Pig Manure on Nutrient Dynamics and Production of Cowpea, Vigna unguiculata L. Walp. Am J Agric For 2(6):267Parera i Pous J, Olivé D, Mallol Nabot C, Torrijos NC (2010) Adaptación Del Uso de La Conductividad Eléctrica (CE) Para Determinar de Forma Rápida El Contenido En Nutrientes Del Purín Porcino En Catalunya. International Workshop on Anaerobic Digestion of Slaughterhouse Waste, pp 67–76Patience JF, Gould SA, Koehler D, Corrigan B, Elsbernd A, Holloway CL (2015) Super-dosed phytase improves rate and efficiency of gain in nursery pigs. Anim Ind Rep AS 661:98Penha HG, Menezes JF, Silva CA, Lopes G, Carvalho CA, Ramos SJ, Guilherme LRG (2015) Nutrient accumulation and availability and crop yields following long-term application of pig slurry in a Brazilian Cerrado soil. Nutr Cycl Agroecosyst 101(2):259–269Popovic O, Jensen LS (2012) Storage temperature affects distribution of carbon, VFA, ammonia, phosphorus, copper and zinc in raw pig slurry and its separated liquid fraction. Water Res 46(12):3849–3858Provolo G, Martínez-Suller L (2007) In situ determination of slurry nutrient content by electrical conductivity. Bioresour Technol 98(17):3235–3242Sánchez M, González JL (2005) The fertilizer value of pig slurry. I. Values depending on the type of operation. Bioresour Technol 96(10):1117–1123SAS Institute (2008) SAS/STAT User´s guide, v 9.3. SAS Institute Inc., CarySchoumans OF, Chardon WJ, Bechmann ME, Gascuel-Odoux C, Hofman G, Kronvang B, Rubæk HG, Ulén B, Dorioz JM (2014) Mitigation options to reduce phosphorus losses from the agricultural sector and improve surface water quality: a review. Sci Total Environ 468–469:1255–1266Schröder JJ, Cordell D, Smit AL, Rosemarin A (2010) Sustainable use of phosphorus. Plant Research International Wageningen UR. Report 357Scotford IM, Cumby TR, White RP, Carton OT, Lorenz F, Hatterman U, Provolo G (1998) Estimation of the nutrient value of agricultural slurries by measurement of physical and chemical properties. J Agric Eng Res 71(3):291–305Snoek DJW, Johannes DS, Ogink NWM, Koerkamp PWGG (2014) Sensitivity analysis of mechanistic models for estimating ammonia emission from dairy cow urine puddles. Biosyst Eng 121:12–24Suresh A, Choi HL, Oh DI, Moon OK (2009) Prediction of the nutrients value and biochemical characteristics of swine slurry by measurement of EC—electrical conductivity. Bioresour Technol 100:4683–4689Thygesen O, Triolo JM, Sommer SG (2012) Indicators of physical properties and plant nutrient content of animal slurry and separated slurry. Biol Eng Trans 5(3):123–135Triolo JM, Sommer SG, Møller HB, Weisbjerg MR, Jiang XY (2011) A new algorithm to characterize biodegradability of biomass during anaerobic digestion: influence of lignin concentration on methane production potential. Bioresour Technol 102:9395–9402Van Duivenbooden N, de Wit CT, Van Keulen H (1996) Nitrogen, phosphorus and potassium relations in five major cereals reviewed in respect to fertilizer recommendations using simulation modelling. Fertil Res Wagening 44:37–49Viguria M, Sanz-Cobeña A, López DM, Arriaga H, Merino P (2015) Ammonia and greenhouse gases emission from impermeable covered storage and land application of cattle slurry to bare soil. Agric Ecosyst Environ 199:261–271Villamar CA, Canuta T, Belmonte M, Vidal G (2012) Characterization of swine wastewater by toxicity identification evaluation methodology (TIE). Water Air Soil Pollut 223(1):363–369Villamar CA, Rodríguez DC, López D, Peñuela G, Vidal G (2013) Effect of the generation and physical–chemical characterization of swine and dairy cattle slurries on treatment technologies. Waste Manage Res 31(8):820–828Villar MC, Petrikova V, Díaz-Raviña M, Carballas T (2004) Recycling of organic wastes in burnt soils: combined application of poultry manure and plant cultivation. Waste Manage 24(4):365–370Webb J, Menzi H, Pain BF, Misselbrook TH, Dämmgen U, Hendriks H, Döhler H (2005) Managing ammonia emissions from livestock production in Europe. Environ Pollut 135:399–406Webb J, Broomfield M, Jones S, Donovan B (2014) Ammonia and odour emissions from UK pig farms and nitrogen leaching from outdoor pig production. Sci Total Environ 470:865–875Weiland P (2010) Biogas production: current state and perspectives. Appl Microbiol Biotechnol 85:849–860Yagüe MR, Bosch-Serra AD, Boixadera J (2012) Measurement and estimation of the fertiliser value of pig slurry by physicochemical models: usefulness and constraints. Biosyst Eng 111(2):206–216Zhang W, Wei Q, Wu S, Qi D, Li W, Zuo Z, Dong R (2014) Batch anaerobic co-digestion of pig manure with dewatered sewage sludge under mesophilic conditions. Appl Energy 128:175–18

Non-Standard Errors

In statistics, samples are drawn from a population in a data-generating process (DGP). Standard errors measure the uncertainty in estimates of population parameters. In science, evidence is generated to test hypotheses in an evidence-generating process (EGP). We claim that EGP variation across researchers adds uncertainty: Non-standard errors (NSEs). We study NSEs by letting 164 teams test the same hypotheses on the same data. NSEs turn out to be sizable, but smaller for better reproducible or higher rated research. Adding peer-review stages reduces NSEs. We further find that this type of uncertainty is underestimated by participants

Non-standard errors

In statistics, samples are drawn from a population in a data-generating process (DGP). Standard errors measure the uncertainty in estimates of population parameters. In science, evidence is generated to test hypotheses in an evidence generating process (EGP). We claim that EGP variation across researchers adds uncertainty: Non-standard errors (NSEs). We study NSEs by letting 164 teams test the same hypotheses on the same data. NSEs turn out to be sizable, but smaller for better reproducible or higher rated research. Adding peer-review stages reduces NSEs. We further find that this type of uncertainty is underestimated by participants

Comparing mountain breezes and their impacts on CO₂ mixing ratios at three contrasting areas

International audienc

Differences in the pressures of canal anal and rectal sensitivity in patients with fecal incontinence, chronic constipation and healthy subjects Diferencias en las presiones del canal anal y la sensibilidad rectal en pacientes con incontinencia anal, estreñimiento crónico y sujetos sanos

Introduction: There exist a great variability in the manometric findings between patients with anal incontinence (AI) and healthy subjects. The correlation between the pressures of the anal canal and the AI is not exact by the wide rank of normal values. Objectives: Prospective study to evaluate differences in the pressures of the anal canal and in rectal sensitivity in patients with AI, chronic constipation (CC) and healthy subjects. Material and methods: Ninety four patients with AI, 36 patients with CC and 15 healthy subjects were included. The following data were obtained: age, sex, resting pressure, anal canal length (ACL), squeeze maximum pressure (SMP), squeeze pressure duration (SPD), first sensation, urge and maximum tolerated volume (MTV). Statistical study: test of Kruskal-Wallis, test of Mann-Whitney, and multinomial logistic regression test. Results: There were significant differences in the resting pressure (p Introducción: Existe gran variabilidad en los hallazgos manométricos entre pacientes con incontinencia anal (IA) y sujetos sanos. La correlación entre las presiones del canal anal y la IA no es exacta por el amplio rango de valores normales. Objetivos: Estudio prospectivo para evaluar diferencias en las presiones del canal anal y en la sensibilidad rectal en pacientes con IA, estreñimiento crónico (EC) y sujetos sanos. Material y métodos: Noventa y cuatro pacientes con IA, 36 pacientes con EC y 15 sujetos sanos. Se obtuvieron: edad, sexo, presión de reposo, longitud del canal anal (LCA), presión de máxima contracción voluntaria (PMCV), duración de la contracción voluntaria, primera sensación, sensación de urgencia y máximo volumen tolerado (MVT). Estudio estadístico: test de Kruskal-Wallis, test de Mann-Whitney, regresión logística multinomial. Resultados: Se encontraron diferencias significativas en la edad (p < 0,001), la presión de reposo (p < 0,001), la LCA (p < 0,001) y la PMCV (p < 0,01) en el grupo de IA con respecto a los otros dos grupos. El volumen para la primera sensación fue significativamente más bajo en los sujetos sanos que en los otros dos grupos (p < 0,05). El volumen de urgencia y el MVT fueron menores en el grupo con IA con respecto a los otros dos grupos (p < 0,001). En el análisis multivariante la edad, la presión de reposo y el volumen de la primera sensación y de la urgencia aumentan el riesgo relativo de IA. Conclusiones: La mayor edad, la disminución presión basal del canal anal y la alteración del umbral sensorial rectal aumentan el riesgo de IA