Effect of Glycerine and Essential Oils (Anacardium OccidentaleandRicinus Communis)on Animal Performance, Feed Efficiency and Carcass Characteristics of Crossbred Bulls Finished in a Feedlot System

Abstract

The effect of corn substitution by glycerine and essential oils on animal performance, apparent digestibility and red and white blood cells of crossbred bulls finished in feedlot was evaluated. Thirty bulls with average weight of 311±28.8 kg and 22±2 month-old were allocated in three diets: CON (without glycerine or essential oils), GLY (with glycerine) and GEO (with glycerine and essential oils). The bulls were fed a diet of sorghum silage, cracked corn, soybean meal, urea, limestone and mineral salt. Three grams of cashew and castor oil/animal/day were included in GEO diet. Animals were kept in feedlot for 115 days and slaughtered at average weight of 467±40.6 kg. No differences (P<0.05) among diets regarding final body weight, average daily gain and feed conversion were reported. Ether extract intake was higher (P<0.05) in CON diet compared to the others. Dry matter, organic matter and crude protein digestibility was higher (P<0.05) in GLY diet compared to CON. Acid detergent fibre digestibility was higher (P<0.05) in CON compared to GLY diet. Nonfibrous carbohydrate, fibrous carbohydrate and ether extract digestibility were similar (P>0.05) among diets. No effect of glycerine and essential oil addition on total blood cholesterol, triglycerides, haemogram, leukogram and plasmatic proteins was observed. Corn replacement by glycerine and essential oils addition did not affect (P>0.05) carcass weight, dressing and conformation, carcass length and cushion thickness.

Essential Oils in the Diet of Crossbred (½ Angus vs. ½ Nellore) Bulls Finished in Feedlot on Animal Performance, Feed Efficiency and Carcass Characteristics

“…This is consistent with other studies using beef cattle and lambs Cruz et al, 2014;Yang et al, 2009). Lack of effects of essential oils on carcass traits is in agreement with the absence of the effects of essential oils on ADG and feed efficiency in the present study.…”

“…In general, the addition of essential oils in the diet of cattle finished in feedlot and fed on a diet with high energy density has no effect in carcass traits (Benchaar et al, 2006;Cruz et al, 2014;Fugita et al, 2017). This is consistent with other studies using beef cattle and lambs Cruz et al, 2014;Yang et al, 2009).…”

“…Moreover, these compounds impact ruminant production by affecting protein and lipid metabolism in the rumen, stimulating of feed digestion, reduction of hyper-producing ammonia bacteria, affecting bacterial colonization of substrates in the rumen, and due to antimicrobial, anti-inflammatory and antioxidant properties (Benchaar et al, 2006;Benchaar et al, 2008;Calsamiglia et al, 2007;Chaves et al, 2008;Cruz et al, 2014;Fugita et al, 2017;Hart et al, 2008;Valero et al, 2016). For example, feeding cinnamaldehyde or essential oils from juniper berry (200 mg/kg of DM) improved average daily gain of lambs .…”

<b>Carcass characteristics and sensorial evaluation of meat from Nellore steers and crossbred Angus vs. Nellore bulls

“…However, the cattle finished in the pasture system need higher weights to meet the requirements of the Brazilian market Carcass dressing percentage was similar (p < 0.10) between Nellore and crossbred Nellore vs. Angus bulls. In general, in Brazil, carcass dressing percentage of Nellore or crossbred bulls can vary from 50 to 55% (Cruz et al, 2014;Rotta et al, 2009;Zawadzki et al, 2011).…”

Subproduto Do Biodiesel Na Alimentação De Ruminantes: O Caso Da Glicerina

“…Os mesmos autores observaram pequeno efeito sobre o desempenho e o perfil de ácidos graxos do músculo Longissimus dorsi. Cruz et al (2014) substituíram 160 g de glicerina/ kg de milho na MS da dieta de bovinos, correspondendo a 16% de utilização, e não observaram alterações no desempenho animal, eficiência alimentar e digestibilidade aparente da dieta, em relação ao grupo que não recebeu o coproduto na dieta. Eiras et al (2014a) concluíram, em estudo com bovinos confinados em terminação, que a digestibilidade aparente total da matéria seca, matéria orgânica, proteína, carboidratos não fibrosos e dos carboidratos totais, e a eficiência alimentar aumentaram linearmente em resposta à inclusão de glicerina nas dietas (0, 60, 120 ou 180 g/kg de MS).…”