Live Performance, Carcass, and Bone Quality Responses of Grower and Finisher Broilers to Dietary Metabolizable Energy Levels

Gopinger, E.; Krabbe, E. L.; Surek, D.; Lopes, LS; Avila, VS

doi:10.1590/1806-9061-2017-0508

Cited by 12 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…total and digestible amino acids in broilers was studied, and Ghaffari et al (2007) found significant differences in feed conversion, with a decrease in the conversion value from 2.43 to 1.79. The results of the present study are consistent with those of Gopinger et al (2017), that found a linear effect on feed:gain ratio, with the better feed conversion (1,64) obtained with the higher energetic value (3250 kcacl/kg was 9630 kcal, and the highest intake was 10020 kcal, with an estimated value of 2966.75 kcal/ kg of diet, according to the quadratic model. These variations in energy intake differ from those found by Barbosa et al (2008), who did not find significant differences in ME intake during any of the phases tested (22 to 35, 36 to 42 and 43 to 49 days old) in confined broilers.…”

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Isupporting

confidence: 92%

“…The lack of significant effects on weight gain can be explained in part by the ability of the birds to adjust their consumption to meet their energy needs (Gopinger et al, 2017). The results observed in the present research agree with those of Ávila et al (2005), who evaluated different metabolizable energy levels for fastgrowing broiler breeders with access to picket and did not observe effects on the weight gain from 28 to 41 days old.…”

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Isupporting

confidence: 90%

“…According to Sakomura et al (2004), this extra caloric effect consists in part of the extra metabolic effect of lipids, which results in an improvement in energy efficiency by increasing the net energy of the feed. Other authors also observed improvements in the feed conversion index due to an increase in the energy level (Araújo et al, 2005;Ghaffari et al,2007;Gopinger et al, 2017). The effect of seven levels (2575 to 3176 kcal/kg) of metabolizable energy on diets formulated with Table 3 -Energy level effect on weight gain, feed intake, feed:gain ratio, metabolizable energy intake and viability of slow-growing broilers in a free-range system.…”

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Imentioning

confidence: 95%

See 2 more Smart Citations

Metabolizable energy for broilers with different genetic growth potentials under a free-range system

Massi¹,

Lima²,

Machado³

et al. 2018

Bol. Ind. Anim.

View full text Add to dashboard Cite

The objective of this study was to evaluate the effects of different levels of metabolizable energy (ME) on performance parameters and carcass characteristics in slow-growing (experiment 1) and fast-growing (experiment 2) broilers in a free-range system. Were evaluated broilers from 35 to 70 days old in experiment 1 and 28 to 49 days old in experiment 2. A completely randomized experimental design was employed in both experiments, with five treatments and four replicates totaling 20 experimental units containing 15 broilers each. The treatments consisted of rations that had increasing metabolizable energy levels obtained by the substitution of soybean oil in the basal diet for the inert sand ingredient. The metabolizable energy levels studied in experiment 1 were 2700, 2800, 2900, 3000 and 3100 kcal/kg, and in experiment 2, they were 2800, 2900, 3000, 3100 and 3200 kcal/kg. In experiment 1, there was a linear (P<0,05) reduction in consumption with the increase in the metabolizable energy level, and a quadratic effect (P<0,05) on the feed conversion was observed, which was estimated as 3046 kcal/kg the level that resulted in a better feed conversion of 2.648. In experiment 2, the metabolizable energy level exerted a significant quadratic effect (P<0,05) on the feed intake and metabolizable energy consumption, with a maximum feed intake (3361.27 g) estimated for 2842 kcal/kg, and the maximum energy intake was estimated at 10020 kcal. The feed conversion decreased linearly (P<0,05) with there was an increase in the studied levels. For broilers reared in a free-range system, for better feed conversion, the recommended metabolizable energy levels are as follows: for slow-growing broilers from 35 to 70 days of age, 3046 kcal/kg, and 3200 kcal/kg is recommended for fast-growing broilers from 28 to 49 days of age.

show abstract

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Isupporting

confidence: 92%

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Isupporting

confidence: 90%

Section: Experiments 2 -Metabolizable Energy In Fastgrowing Broilers Imentioning

confidence: 95%

See 1 more Smart Citation

Metabolizable energy for broilers with different genetic growth potentials under a free-range system

Massi¹,

Lima²,

Machado³

et al. 2018

Bol. Ind. Anim.

View full text Add to dashboard Cite

show abstract

“…Regarding the carcass yield of the birds at the end of the growing cycle, Gopinger et al (2017), when evaluating variation in the energy level (variation ± 200 Kcal kg -1 of metabolisable energy), also did not observe an effect of the energy level on the weight of the carcass or the cuts of the chickens at the end of the production cycle of the birds.…”

Section: Concomitantmentioning

confidence: 85%

Use of emulsifier and lipase in feeds for broiler chickens

Oliveira

Balbino

Silva

et al. 2019

SCA

View full text Add to dashboard Cite

The objective of this study was to evaluate the effect of exogenous emulsifier and lipase in diets on performance, digestibility, and organ biometry of broiler chickens. A completely randomised design with seven treatments and seven replications was adopted. The treatments were as follows: T1 (positive control; PC): 3000, 3100, 3200, and 3250 Kcal of metabolisable energy (ME) kg-1 of diet for phases 1 to 10, 11 to 21, 22 to 31, and 32 to 37 days, respectively; T2: PC with reduction in ME of 30 Kcal kg-1 of diet; T3: PC with reduction in ME of 60 Kcal kg-1 of feed; T4 (negative control; NC): PC with reduction in ME of 90 Kcal kg-1 of feed; T5: NC with inclusion of exogenous lipase (10 000 U kg-1); T6: NC with inclusion of emulsifier (250 g t-1); and T7: NC with inclusion of lipase (10 000 U kg-1) and emulsifier (250 g t-1) in the period from 1 to 37 days of rearing. Performance characteristics (weight gain (WG), feed intake (FI), and feed conversion (FC)), carcass yield, cut yield, the relative weight of abdominal fat and organs (small intestine, liver, and pancreas), and relative intestinal length, in addition to dry matter digestibility (CDADM), ethereal extract (CDAEE), crude metabolisable energy (CMACE), and apparent metabolisable energy (AME) of the diets, were evaluated. In the initial phase, the CDAEE was higher for the PC group than for the emulsifier + lipase group. The AME determined in the final phase for the group supplemented with an emulsifier was higher by approximately 50 Kcal (EM) than the NC group. The WG of the lipase group was similar to that of the PC group. However, the groups with emulsifier and emulsifier + lipase showed a lower WG than the PC group. The additives used did not recover the FC to the same level observed in the PC group. The reduction in ME of 90 Kcal kg-1 generated a lower WG and worse FC. The use of both an emulsifier and lipase together produced results like to the PC group. The biometrics of the organs and the carcass yield and cuts were not influenced by diets. Thus, it can be concluded that the inclusion of lipase and an emulsifier improves the performance of broilers given diets with reduced energy, although it does not improve the lipid utilisation of the diets.

show abstract

“…According to Dessimoni et al (2019), birds tend to increase their FI in an attempt to compensate for the nutrient deficit. As stated by Gopinger, Krabbe, Surek, Lopes and Avila (2017), FI in broilers is increased with a reduction in the dietary DM. The reduction in energy and amino acid levels in the present study was possibly not severe enough to prompt an adjustment in FI.…”

Section: Resultsmentioning

confidence: 87%

Xylanase and β-glucanase in maize- and soybean meal-based diets for broilers

Diana

Albino

Rostagno

et al. 2020

Semina: Ciênc. Agrár.

View full text Add to dashboard Cite

The objective of this study was to evaluate the effect of adding different xylanase and ?-glucanase enzyme blends to maize- and soybean meal-based diets on performance and energy metabolizability in broilers. Two experiments were carried out with broilers of the COBB 500 strain. In the first experiment, 1960 chicks were assigned to a completely randomized design with a 2 × 3 + 1 factorial arrangement, totaling seven treatments, namely, T1- Positive control (PC); T2 - Negative control 1 (NC1; PC minus 200 kcal kg-1 ME); T3 - NC1 + Blend A; T4 - NC1 + Blend B; T5 - Negative control 2 (NC2; PC minus 167 kcal kg-1 ME and 5% amino acids); T6 - NC2 + Blend A; and T7 - NC2 + Blend B. Fourteen replicates were used per treatment and 20 birds per experimental unit. The parameters evaluated at 21 and 42 days of age were weight gain (WG), feed intake (FI) and feed conversion (FC). At 42 days, production efficiency index (PEI), viability and the yields of cuts were also calculated. Birds that received diets with a reduced nutritional value showed a reduction in WG and PEI and worsened FC as compared those of PC treatment (p < 0.05). However, the birds that consumed the NC2 diet with Blend B exhibited a similar WG to those in PC group (p > 0.05) from 1 to 21 days of life. For the yield of thigh + drumstick, the factors were statistically similar (p > 0.05) to those observed in the PC birds. In the second experiment, 432 fourteen-day-old chicks were distributed in a completely randomized design with seven treatments, with eight replicates per treatment and six birds per experimental unit. The apparent metabolizable energy (AME) and nitrogen-corrected AME (AMEn) values were determined. Overall, the NC2 diet with Blend B provided the highest AME and AMEn values; however, NC1 with the same enzyme blend was the treatment which provided the lowest values. The addition of xylanase and ?-glucanase enzyme blends to maize- and soybean meal-based diets improves WG at 21 days as well as PEI in broilers; however, it does not influence the yield of cuts. Enzymes (Blend B) improve the energy metabolization of broiler diets with reduced energy and amino acid levels.

show abstract

Live Performance, Carcass, and Bone Quality Responses of Grower and Finisher Broilers to Dietary Metabolizable Energy Levels

Cited by 12 publications

References 9 publications

Metabolizable energy for broilers with different genetic growth potentials under a free-range system

Metabolizable energy for broilers with different genetic growth potentials under a free-range system

Use of emulsifier and lipase in feeds for broiler chickens

Xylanase and β-glucanase in maize- and soybean meal-based diets for broilers

Contact Info

Product

Resources

About