The Withdrawal Feed of Broilers: Carcass Responses to Dietary Phosphorus

Chen, X.; Moran, E. T.

doi:10.1093/japr/4.1.69

Cited by 25 publications

(7 citation statements)

References 16 publications

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“…Inadequate P levels reduce broiler carcass yield (Chen & Moran, 1995). However, in the present study, dietary NPP levels did not affect carcass yield or relative weights of the liver, heart, or kidney.…”

Section: Carcass Traitscontrasting

confidence: 73%

Effects of Non-phytate Phosphorus and 1a-Hydroxycholecalciferol on Growth Performance, Bone Mineralization, and Carcass Traits of Broiler Chickens

Han

Wang

et al. 2015

Rev. Bras. Cienc. Avic.

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This study evaluated the effects of dietary non-phytate phosphorus (NPP) and 1α-hydroxycholecalciferol (1α-OH-D 3 ) on the growth performance, bone mineralization, and carcass traits of 1-to 21-day-old broiler chickens. On the day of hatch, 600 male Ross 308 chicks were weighed and randomly assigned to 12 treatments, with five cages of 10 birds each. A 6 × 2 factorial arrangement was applied, consisting of 0.20%, 0.25%, 0.30%, 0.35%, 0.40%, or 0.45% NPP and 0 or 5 μg/kg of 1α-OH-D 3 . The basal diet contained 0.52% calcium (Ca) and was not supplemented with vitamin D 3 . Dietary NPP levels significantly affected growth performance and tibia mineralization (except width) of broilers; by contrast, meat yield and organ relative weight were not influenced by NPP. The inclusion of 1α-OH-D 3 improved growth performance, tibia mineralization, and carcass and breast yield, whereas it decreased the relative weights of the liver, heart, and kidney. A significant interaction between NPP and 1α-OH-D 3 was observed for body weight gain (BWG), feed efficiency (FE), mortality, serum Ca and P levels, tibia breakingstrength, ash weight, and Ca content, as well as breast yield and heart relative weight. These results suggest that broilers fed with 5 μg of 1α-OH-D 3 per kg of diet obtain optimal growth performance and tibia mineralization when dietary NPP level was 0.30% and the analyzed Ca to NPP ratio was 1.97.

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Section: Carcass Traitscontrasting

confidence: 73%

Effects of Non-phytate Phosphorus and 1a-Hydroxycholecalciferol on Growth Performance, Bone Mineralization, and Carcass Traits of Broiler Chickens

Han

Wang

et al. 2015

Rev. Bras. Cienc. Avic.

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“…It is showed that low nPP diets, in the first stage of growth, caused better adaptation to lower concentrations of P in subsequent stages (Moran and Todd, ). Phosphorus concentrations and phytase inclusion had no effect on total FI, and it is in agreement with previous reports (Chen and Moran, , ; Skinner et al., ). In addition, chicks which received 4.5 g/kg nPP of starter diet with phytase inclusion in grower feed showed an increase in total FI compared with those received 6 g/kg of nPP in the starter period.…”

Section: Discussionsupporting

confidence: 93%

Effects of high non‐phytate phosphorus starter diet on subsequent growth performance and carcass characteristics of broiler chickens

Baradaran

Shahir

Waldroup

et al. 2013

Animal Physiology Nutrition

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The trial was performed to investigate the effects of different concentrations of non-phytate phosphorus (nPP) in the starter and grower (with phytase inclusion) periods on carcass characteristics, organ weight and weekly variations of growth performance in the grower period. Seven hundred and twenty-day-old male broiler chickens were randomly assigned to 12 treatments in a completely randomized design. Chickens received two dietary treatments (4.5 g/kg and 6 g/kg nPP) in the starter (0-21 days) and six experimental diets (4 g/kg, 3.1 g/kg, 2.3 g/kg and 2.3 g/kg + 1000 FTU/Kg of feed phytase, 1.5 g/kg, 1.5 g/kg nPP + 1000 FTU/Kg of feed phytase) in the grower period (22-42 days). Results showed that phytase inclusion in the second and third weeks of grower period could increase feed intake significantly. Also, decrease in the concentrations of nPP to 1.5 g/kg caused to decline body weight gain markedly. Moreover, there is a significant difference between 4.5 g/kg and 6 + 4 g/kg nPP (starter+grower) and 1.5 g/kg nPP. Phytase inclusion increased carcass yield and declined liver weight significantly. Dietary treatment of 4.5 + 1.5 g/kg nPP enhanced heart and liver weight markedly. It is concluded that starter diets with increased concentration of nPP (6 g/kg nPP) had no beneficial effects on growth performance in the starter and grower period in the total (0-42 days). Also, it is possible to decrease nPP concentration of grower diets to 1.5 and 2.3 g/kg with and without phytase inclusion respectively.

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“…Decreasing the available phosphorus of 21-to 42-d-old broilers from 4.0 to 2.5 g kg -1 decreased the BWG and carcass yield (Chen and Moran, 1995). Birds fed 4.0 g kg -1…”

Section: Resultsmentioning

confidence: 96%

Effects of calcium to non-phytate phosphorus ratio and different sources of vitamin D on growth performance and bone mineralization in broiler chickens

et al. 2016

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-A 7 × 2 factorial experiment was designed to test the effects of calcium (Ca) to non-phytate phosphorus (NPP) ratio (1.14, 1.43, 1.71, 2.00, 2.29, 2.57, and 2.86) and different sources of vitamin D (1α-hydroxycholecalciferol (1α-OH-D 3 ) and 25-hydroxycholecalciferol (25-OH-D 3 )) on growth performance and bone mineralization in 1-to 42-d-old broiler chickens. On the day of hatch, 700 female Ross 308 broilers were weighed and randomly assigned to 14 treatments with five stainless steel cages of 10 birds each. Dietary Ca levels were 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, and 10.0 g kg −1 and the NPP content was 3.5 g kg −1 . The dose of 1α-OH-D 3 or 25-OH-D 3 was 5 µg kg −1 . Diets were not supplemented with cholecalciferol (vitamin D 3 ). Results showed that the Ca to NPP ratio, vitamin D source, and their interaction affected body weight gain (BWG), feed intake (FI), feed efficiency (FE), and carcass and breast yields, as well as tibia weight and length and ash weight in broiler chickens from 1 to 42 d of age. Broilers fed 1α-OH-D 3 had higher BWG and FI as well as tibia breaking strength, weight, length, diameter, and ash weight than birds fed 25-OH-D 3 at 42 d of age. The Ca to NPP ratio had a quadratic effect on BWG, FI, mortality, as well as tibia breaking strength, weight, length, ash weight, and ash and P contents in 42-d-old broilers. Broiler chickens at 42 d of age obtain optimal growth performance and bone mineralization at the Ca to NPP ratio of 2.32 when 1α-OH-D 3 or 25-OH-D 3 are used as the vitamin D source.

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The Withdrawal Feed of Broilers: Carcass Responses to Dietary Phosphorus

Cited by 25 publications

References 16 publications

Effects of Non-phytate Phosphorus and 1a-Hydroxycholecalciferol on Growth Performance, Bone Mineralization, and Carcass Traits of Broiler Chickens

Effects of Non-phytate Phosphorus and 1a-Hydroxycholecalciferol on Growth Performance, Bone Mineralization, and Carcass Traits of Broiler Chickens

Effects of high non‐phytate phosphorus starter diet on subsequent growth performance and carcass characteristics of broiler chickens

Effects of calcium to non-phytate phosphorus ratio and different sources of vitamin D on growth performance and bone mineralization in broiler chickens

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