Desempenho e rendimento de carcaça de frangos de corte alimentados com mistura de aditivos fitogênicos na dieta

Abstract

Resumo -O objetivo deste trabalho foi avaliar o efeito de misturas de aditivos fitogênicos na dieta de frangos de corte, sobre seu desempenho zootécnico e rendimento de carcaça. Foram avaliados 660 pintos de sexo misto, entre 1 e 42 dias de idade, em delineamento inteiramente casualizado, com cinco tratamentos e seis repetições de 22 aves (11 machos e 11 fêmeas). Além do controle, foram avaliados tratamentos com antibiótico (10 ppm de virginiamicina) ou com misturas de aditivos fitogênicos: mistura A, 150 ppm de óleos essenciais de alecrim, cravo, gengibre e orégano; mistura B, 150 ppm de óleos essenciais de canela, sálvia, tomilho branco e óleo-resina de copaíba; e mistura A+B, 50% da mistura A e 50% da B. A mistura B proporcionou maior ganho de peso e melhor conversão alimentar das aves, no período de 36 a 42 dias de idade. No período total do experimento, o antibiótico e a mistura B proporcionaram maior ganho de peso das aves. O consumo de ração foi maior com o antibiótico do que com o controle. A mistura A+B e o tratamento controle proporcionaram maior rendimento de coxa+sobrecoxa e maior peso relativo do baço. As mistura B e A+B apresentam potencial como melhoradores de desempenho para frangos de corte.Termos para indexação: Gallus gallus, antibiótico melhorador de desempenho, extratos de plantas, óleos essenciais, óleo-resina de copaíba. Growth performance and carcass yield of broiler chicken feed diets with blends of phytogenic additivesAbstract -The objective of this work was to evaluate the effect of blending phytogenic additives in broiler chicken diets on their growth performance and carcass yield. Six hundred and sixty mixed-sex broiler chicks, from 1 to 42 days of age, were evaluated in a completely randomized design, with five treatments and six replicates of 22 chicks each (11 males and 11 females). Besides the control, treatments with antibiotic (10 ppm virginiamycin) or with blends of phytogenic additives were evaluated: blend A, 150 ppm of a mixture of essential oils from rosemary, clove, ginger, and oregano; blend B, 150 ppm of a mixture of essential oils from cinnamon, sage, white thyme, and copaiba oil-resin; and blend A+B, a mixture of 50% blend A and 50% blend B. Blend B provided the highest weight gain and better feed conversion rate at the period of 36 to 42 days of age. In the total experimental period, the antibiotic and blend B provided higher broiler weight gain. Feed intake was higher with the antibiotic than with the control. Blend A+B and the control treatment provided higher thigh+drumstick yield and higher relative weight of spleen. The blends B and A+B have potential as performance enhancers for broiler chicken.

Oregano essential oil in the diet of broilers: performance, carcass characteristics, and blood parameters

“…These results are in agreement with those of Corduk et al (2013), who found no difference in the relative weight of the liver and gizzard with administration of 250 mg OEO/kg. Conversely, Koyama et al (2014) observed increased bursa weight in broilers from the negative control group and those treated with a mixture of essential oils compared with broilers from the positive control group and those that received less varied essential oil mixtures. The bursa of Fabricius and thymus are the main immune organs in broilers.…”

“…Oregano essential oil has been associated with antifungal (Bedoya-Serna et al, 2018), antibacterial, and antioxidant activity in vitro (Gandra et al, 2013) and in vivo (Zanini et al, 2013;Ri et al, 2017), stimulation of enzyme secretion (He et al, 2017), and modulation of microbial colonization of the gastrointestinal tract and intestinal morphology (Dias et al, 2015;He et al, 2017). However, reports of its effects on the performance and carcass characteristics of broilers have been inconsistent, with positive effects on these characteristics (Mathlouthi et al, 2012;Peng et al, 2016) as opposed to no effects (Alp et al, 2012;Koyama et al, 2014) being detected.…”

Performance of broilers submitted to different intensities and duration of thermal stress

“…Analyzing the separate effect of the different t db and thermal stress duration (Table 4), there was no significant difference (p>0.05, F test). Thus, it is verified that even with the variation of FI, WG was the same in all treatments tested, thus characterizing as compensatory gain reported in several studies [30][31][32]. This occurs when broilers are housed in a breeding system in which t db is outside the comfort zone, since the birds need to redirect the energy destined for production to the thermoregulatory process [9,10].…”

Effect of organic acids and essential oils on the performance of replacement pullets from their eighteenth to the seventeenth weeks of age

“…Ao contrário, Koiyama et al (2014), trabalhando com misturas de óleos essenciais em dietas para frangos de corte, no período total da criação, relataram que os tratamentos com antibiótico e com a mistura de óleos essenciais de canela, sálvia, tomilho e copaíba proporcionaram maior ganho de peso.…”