Efeito da ractopamina e de métodos de formulação de ração sobre o desempenho e as características de carcaça de leitoas em terminação

This study aimed to evaluate the efficiency of anaerobic digestion and biogas production by manure from pig supplemented with ractopamine over different periods. We used manure of 50 finishing pigs according to the following diets: without supplementation and supplemented with 20-ppm ractopamine during 7, 14, 21, 28 and 35 days pre-slaughter. Continuous bench biodigesters were used in the experiment. We measured biogas production and made analyses of total (TS) and volatile solids (VS), pH, total phosphorus (total P), total nitrogen (total N) and ammoniacal nitrogen (ammoniacal N) in samples of manure, affluent and effluent from biodigesters. The pH and ammoniacal N as indicator parameters of the process balance and stability were satisfactory. Moreover, there was no difference in the reduction of TS and VS (50.04 and 56.51%, respectively). Manure of animals supplemented with ractopamine for 35 and 28 days presented higher biogas production (0.0722 and 0.0603 m 3 kg −1 , respectively). The supplementation with 20-ppm ractopamine for finishing pigs from 7 to 35 days does not present collapse risks for the anaerobic biodigestion process.KEY WORDS: β-adrenergic, biogas, ractopamine hydrochloride, environmental impact and nutrient partitioning BIODIGESTÃO ANAERÓBIA DE DEJETOS DE SUÍNOS EM TERMINAÇÃO SUPLEMENTADOS COM RACTOPAMINA POR DIFERENTES PERÍODOSRESUMO: Objetivou-se avaliar a eficiência do processo de biodigestão anaeróbia e produção de biogás por dejetos de suínos suplementados com ractopamina em diferentes períodos. Utilizaram-se dejetos de 50 suínos em terminação, segundo as dietas recebidas: sem suplementação e co m suplementação de 20 ppm de ractopamina durante sete, 14; 21; 28 e 35 dias pré-abate. Foram utilizados biodigestores contínuos de bancada, mensuradas as produções de biogás e realizadas as análises de sólidos totais (ST) e voláteis (SV), pH, fósforo total (P total), nitrogênio total (N total) e nitrogênio amoniacal (N amoniacal) em amostras de dejetos, afluentes e efluentes dos biodigestores. O pH e N amoniacal como parâmetros indicadores do equilíbrio e da estabilidade do processo apresentaram-se satisfatórios. Não houve diferença nas reduções de ST e SV (50,04 e 56,51%, respectivamente). Dejetos de animais suplementados com ractopamina por 35 e 28 dias apresentam maiores produções de biogás (0,0722 e 0,0603 m 3 /kg, respectivamente). A suplementação com 20 ppm de ractopamina para suínos em terminação, por sete a 35 dias, não oferece riscos de falência do processo de biodigestão anaeróbia.

show abstract

Anaerobic biodigestion of manure from finishing pig supplemented with ractopamine over different periods

Santos

Trevizan

Xavier

et al. 2016

Eng. Agríc.

View full text Add to dashboard Cite

show abstract

A multivariate approach to determine the factors affecting response level of growth, carcass, and meat quality traits in finishing pigs fed ractopamine1

Pompeu¹,

Rodrigues²,

Cavalcanti³

et al. 2017

Journal of Animal Science

View full text Add to dashboard Cite

The effect of ractopamine (RAC) supplementation on growth, carcass, and meat quality traits of finishing pigs was studied using a meta-analytical approach. The database was composed of 57 studies published from 2004 to 2016. The dependent variables extracted for the meta-analysis included final BW, ADG, ADFI, feed:gain ratio, HCW, dressing percentage, carcass length, lean yield, back fat thickness, loin muscle area, loin depth, postmortem pH, meat brightness, redness, and yellowness. The studies were grouped by similarity in 3 clusters (C1, C2, and C3) by hierarchical clustering on principle components. The main differences observed between clusters were those of animal initial weight, which increased from C1 through C3. Linear mixed models were used to analyze the data, where studies were assumed as random effect, whereas the total amount of RAC in the diet, cluster, and sex category were considered fixed effects. The interactions between cluster and sex category (barrows, gilts, and mixed sex) and RAC level were also evaluated. Dietary RAC was effective in improving final weight ( < 0.0001), ADG ( < 0.0001), and feed:gain ratio ( < 0.0001) and had a positive effect on HCW ( < 0.0001), lean yield ( = 0.0081), loin muscle area ( = 0.0190), and loin depth ( < 0.0001). In addition, a relatively limited effect on pork quality was observed in the current study. The RAC supplementation was more effective, mainly when pigs started supplementation with higher initial weight, although different responses were observed according to sex category ( < 0.05). There is ample indication that growth and carcass traits could be improved by dietary RAC supplementation. Ractopamine supplementation did not influence the pork quality.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Efeito da ractopamina e de métodos de formulação de ração sobre o desempenho e as características de carcaça de leitoas em terminação

Abstract: Efeito da ractopamina e de métodos de formulação de ração sobre o desempenho e as características de carcaça de leitoas em terminação

Cited by 2 publications

References 7 publications

Anaerobic biodigestion of manure from finishing pig supplemented with ractopamine over different periods

Anaerobic biodigestion of manure from finishing pig supplemented with ractopamine over different periods

A multivariate approach to determine the factors affecting response level of growth, carcass, and meat quality traits in finishing pigs fed ractopamine1

Contact Info

Product

Resources

About