Lowering the dietary calcium to total phosphorus ratio increases phosphorus utilization in low-phosphorus corn-soybean meal diets supplemented with microbial phytase for growing-finishing pigs.

Liu, J; Bollinger, D. W.; Ledoux, D. R.; Veum, T. L.

doi:10.2527/1998.763808x

Cited by 103 publications

(87 citation statements)

References 16 publications

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“…The efficacy of A. niger phytase in corn and soybeanmeal-based diets was mitigated at high dietary Ca:P ratios (Lei et al 1994;Liu et al 1998). Similarly, the beneficial effects of a P. lycii phytase on reducing faecal P excretion, observed when the Ca:P ratio in the diet was 1.15:1, was no longer evident when added to a diet with a ratio of 1.85:1 (Brady et al 2002).…”

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confidence: 81%

“…1 were older. Lei et al (1994) however, found a depressive effect of dietary Ca level on phytase activity in weanling pigs, and Liu et al (1998) showed that P utilization in growing-finishing pigs in the presence of phytase was improved at a Ca:P ratio of 1 rather than 1.5, indicating that age does not affect this response. The inhibitory effect of Ca on phytase efficacy was shown to be less at pH 2.5 than at pH 6.5; probably because of decreased solubility of the complex at the higher pH (Tamin et al 2004).…”

Section: Phosphorusmentioning

confidence: 99%

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Supplementing corn or corn-barley diets with an E. coli derived phytase decreases total and soluble P output by weanling and growing pigs

Beaulieu¹,

Bedford²,

Patience³

2007

Can. J. Anim. Sci.

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. 2007. Supplementing corn or corn-barley diets with an E. coli derived phytase decreases total and soluble P output by weanling and growing pigs. Can. J. Anim. Sci. 87: 353-364. The efficacy of an E. coli derived phytase on phosphorus (P) digestibility and excretion, on the form of the P excreted, and the optimal dietary calcium (Ca):P ratio was examined. In exp. 1, 63 barrows (40.4 ± 1.9 kg) were assigned to receive one of 21 treatments arranged as a 3 × 7 factorial. Treatments consisted of three Ca levels (0.50, 0.60 and 0.70%) and seven phytase treatments [0, 250, 500, 1000 and 2000 FTU kg -1 of an E. coli-derived phytase and 500 FTU kg 1 of an A. niger phytase added to a P deficient (0.37% P) diet or 0 FTU phytase kg -1 added to a P adequate (0.53% P) diet]. In exp. 2, 144 pigs (6.52 ± 0.75 kg), received a P adequate (0.60% P) diet or a P deficient (0.44% P) diet supplemented with 0, 250, 500, 1000 or 2000 FTU phytase kg -1 for a 28-d trial. A subset of 36 barrows was then fed the same diets in a balance trial. In exp. 3, 36 barrows (7.1 ± 0.75 kg) were assigned to one of six treatments arranged as a 2 × 3 factorial (0 or 500 FTU of phytase kg -1 ; 1.0, 1.6 or 2.2 Ca:P ratio). In exp. 1, P digestibility improved from 21 to 54% with increasing phytase (quadratic; P < 0.05). Supplementing the diet with 500 FTU phytase kg -1 decreased the output of total and soluble P by 25% in exp. 2 and to a similar extent in exp. 3 at the lowest Ca:P ratio (P < 0.05). The effect of phytase on total P digestibility was mitigated as the dietary Ca:P ratio increased in exp. 3. Supplementation of swine diets with an E. coli derived phytase decreases output of total and soluble forms of P, but this effect is reduced at high dietary Ca:P ratios. . Dans le cadre d'une deuxième expérience, les auteurs ont donné à 144 porcs (6,52 ± 0,75 kg) une ration contenant suffisamment de P (0,60 %) ou carencée en P (0,44 %) et enrichie avec 0, 250, 500, 1 000 ou 2 000 FTU de phytase par kg pendant 28 jours. Un sous-échantillon de 36 castrats a ensuite reçu la même ration dans le cadre d'un essai sur le bilan alimentaire. Enfin, dans une troisième expérience, 36 castrats (7,1 ± 0,75 kg) ont été répartis entre six traitements dans une disposition factorielle 2 × 3 (0 ou 500 FTU de phytase par kg; ratio Ca:P de 1,0, 1,6 ou 2,2). Dans la première expérience, la digestibilité du P est passée de 21 % à 54 % avec le relèvement de la dose de phytase (quadratique; P < 0,05). Ajouter 500 FTU de phytase par kg à la ration a diminué l'excrétion de P total et de P soluble de 25 % dans la deuxième expérience et presque autant dans la troisième, au plus faible ratio Ca:P (P < 0,05). Dans cette dernière expérience, la hausse du ratio Ca:P atténue l'incidence de la phytase sur la digestibilité du P total. Enrichir l'alimentation des porcs avec une phytase dérivée de E. coli diminue l'excrétion du P total et du P soluble, mais dans une moindre mesure lorsque le ratio Ca:P est élevé.

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confidence: 81%

Section: Phosphorusmentioning

confidence: 99%

Supplementing corn or corn-barley diets with an E. coli derived phytase decreases total and soluble P output by weanling and growing pigs

Beaulieu¹,

Bedford²,

Patience³

2007

Can. J. Anim. Sci.

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“…Growth improvement by lowering the Ca to NPP ratio results from the increase in phytase activity, P digestibility, and P retention in broiler chickens (Qian et al, 1997), turkeys (Qian et al, 1996), and pigs (Liu et al, 1998;Stein et al, 2011). Lowering the dietary Ca to NPP ratio also increases the absorbed and retained P (Al-Masri, 1995).…”

Section: Resultsmentioning

confidence: 99%

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 P recommendations of several universities were 10 to 20% and of industries were 20 to 30% above the 1988 NRC requirements (Cromwell 1989), and P concentrations in sow and finisher pig diets were 40 to 55% above these requirements (Spears 1996). Pigs fed commercial feeds excrete 50 to 80% of P intake (Kornegay and Harper 1997), and faecal P excretion increased with increasing dietary P Liu et al 1998); thus, a portion of P excreted by pigs results directly from feeding excessive levels of P. Therefore, reducing excessive P levels in diets may markedly reduce P excretion.…”

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confidence: 99%

Digestible phosphorus requirement of grower pigs

Ekpe¹,

Zijlstra²,

Patience³

2002

Can. J. Anim. Sci.

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Ekpe, E. D., Zijlstra, R. T. and Patience, J. F. 2002. Digestible phosphorus requirement of grower pigs. Can. J. Anim. Sci. 82: 541-549. Phosphorus excretion may have a major impact on the environment if it is not managed properly. The success of management strategies for reducing P excretion of pigs is dependent partly on more accurate estimates of P requirements, specifically digestible instead of total P requirements. Performance and metabolism studies were conducted to determine digestible P requirements of grower pigs based on performance, plasma and bone P, and P excretion and retention variables, using 200 pigs (23 ± 0.9 kg) and 20 barrows (54 ± 3.1 kg), respectively. Pigs were fed one of five concentrations of dietary digestible P (0.19, 0.24, 0.33, 0.35, and 0.38%). Increasing digestible P quadratically increased average daily gain (ADG) (P < 0.01), feed intake (P < 0.05), and feed efficiency (P < 0.001). Barrows had a higher ADG than gilts (0.890 vs. 0.838 kg d -1 ; P < 0.05); however, digestible P requirement was higher for gilts than for barrows (6.92 vs. 6.17 g d -1 or 0.36 vs. 0.32% in diet; P < 0.05). In barrows, increasing digestible P intake quadratically increased P in plasma and urine (P < 0.01), and linearly increased P in faeces (P < 0.01), suggesting that P excretion depends on excess P intake. Using regression analysis, digestible P requirements were 6.45 g d -1 with ADG, 7.46 g d -1 with bone P, 6.01 g d -1 with plasma P, 3.61 g d -1 with urinary P, 5.86 g d -1 with retained P, and 5.11 g d -1 with retained N. Feeding P closer to pig requirements will reduce P excretion. 541-549. Si on n'y prête garde, l'excrétion de phosphore pourrait avoir de sérieuses répercussions sur l'environnement. Pour donner de bons résultats, les stratégies d'élevage visant à réduire la quantité de P excrétée par les porcs dépendent en partie d'une estimation plus pré-cise des besoins de l'animal en phosphore, plus exactement de la quantité de P digestible et non totale. Les auteurs ont entrepris des études de rendement et de métabolisme afin d'établir la demande de P digestible chez le porc en fonction du rendement de l'animal, de la concentration de P dans le sang et les os et des variables d'excrétion et de rétention du P. Ils ont pour cela recouru à 200 porcs (23 ± 0,9 kg) et à 20 castrats (54 ± 3,1 kg), respectivement. Les animaux ont reçu une de cinq rations contenant une quantité variable de P digestible dans les aliments (0,19, 0,24, 0,33, 0,35 et 0,38 %). La hausse de la concentration de P digestible entraîne une augmentation géométrique du gain quotidien moyen (GQM) (P < 0,01), de la prise alimentaire (P < 0,05) et de la valorisation des aliments (P < 0,001). Les castrats présentent un meilleur GQM que les truies nullipares (0,890 c. 0,838 kg par jour; P < 0,05), mais ces dernières exigent plus de P digestible (6,92 c. 6,17 g par jour ou 0,36 c. 0,32 % de la ration; P < 0,05). Chez les castrats, l'augmentation de la quantité de P digestible accroît géométriquement la concentration de P dans le sang et ...

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Lowering the dietary calcium to total phosphorus ratio increases phosphorus utilization in low-phosphorus corn-soybean meal diets supplemented with microbial phytase for growing-finishing pigs.

Cited by 103 publications

References 16 publications

Supplementing corn or corn-barley diets with an E. coli derived phytase decreases total and soluble P output by weanling and growing pigs

Supplementing corn or corn-barley diets with an E. coli derived phytase decreases total and soluble P output by weanling and growing pigs

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

Digestible phosphorus requirement of grower pigs

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