Untersuchungen über den Calcium-, Phosphor-, Magnesium- und Stickstoffumsatz des Ferkels in Beziehung zum Wachstum bei Muttermilch und Muttermilchersatz

Freese, H. H.

doi:10.1080/17450395809424791

Cited by 22 publications

(4 citation statements)

References 8 publications

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“…Mobilization of Ca from bone has been primarily triggered by the requirement of P for milk production. Because the Ca to P ratio in bone (2.08; Jongbloed, 1987) is higher than in milk (1.24 to 1.41; Freese, 1958) the relative Ca surplus will be excreted via urine. Therefore, Ca balance studies are needed to elucidate the exact Ca requirement for lactating multiparous sows.…”

Section: Discussionmentioning

confidence: 99%

The efficacy of Aspergillus niger phytase in rendering phytate phosphorus available for absorption in pigs is influenced by pig physiological status.

Kemme¹,

Jongbloed²,

Mroz³

et al. 1997

Journal of Animal Science

130

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We performed an experiment with 112 piglets, 32 growing-finishing pigs, and 12 sows during pregnancy and lactation to test the hypotheses that apparent total tract digestibilities of P and Ca as well as the efficacy of Aspergillus niger phytase in rendering phytate P available in pigs depend on pig physiological status. All pigs were fed diets with identical feedstuff composition either without or with added microbial phytase (Natuphos, 500 FTU/kg diet). The diets contained 6.2 g Ca, 4.8 g total P, and 3.7 g phytate P per kilogram, and intrinsic phytase activity of 120 FTU/kg. The digestibility of P increased by 8.3 percentage units when BW of pigs increased from 30 to 60 kg and then remained stable until 100 kg. Pregnant sows had a lower efficiency of P absorption than piglets and growing-finishing pigs. During lactation, the efficiency of P absorption was 3.4 percentage units higher than during pregnancy but was still 6.6 percentage units lower than for growing-finishing pigs. The efficacy of the phytase in generating digestible P decreased in the order or lactating sows, growing-finishing pigs, sows at the end of pregnancy, piglets, and sows at midpregnancy; the average amounts of generated digestible P were 1.03, .83, .74, .66, and .32 g/kg diet, respectively. The addition of phytase to the diet raised apparent Ca digestibility in the piglets and growing-finishing pigs (by 4.6 and 4.0 percentage units, respectively) but not in the sows. We conclude that in the formulation of swine diets the amount of phytase to be added should be tailored to the target category.

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Section: Discussionmentioning

confidence: 99%

The efficacy of Aspergillus niger phytase in rendering phytate phosphorus available for absorption in pigs is influenced by pig physiological status.

Kemme¹,

Jongbloed²,

Mroz³

et al. 1997

Journal of Animal Science

130

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“…A further complication is to obtain a good estimate of the P concentration in sow's milk. This may vary from 1.2 to 1.7 g kg" 1 , although in the literature a value of 1.55 g kg" 1 is generally adopted (Guéguen & Salmon-Legagneur, 1959;Freese, 1958). The P content of sow's milk seems to increase with the stage of lactation (Freese, 1958).…”

Section: The Requirement Of P For Milk Productionmentioning

confidence: 99%

“…This may vary from 1.2 to 1.7 g kg" 1 , although in the literature a value of 1.55 g kg" 1 is generally adopted (Guéguen & Salmon-Legagneur, 1959;Freese, 1958). The P content of sow's milk seems to increase with the stage of lactation (Freese, 1958). For our calculations we assume 1.6 g P kg -1 milk.…”

Section: The Requirement Of P For Milk Productionmentioning

confidence: 99%

Apparent digestible phosphorus in the feeding of pigs in relation to availability, requirement and environment. 2. The requirement of digestible phosphorus for piglets, growing-finishing pigs and breeding sows.

Jongbloed¹,

Everts²

1992

NJAS

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Digestible phosphorus requirement for maintenance, growth, foetal growth and milk production of pigs was estimated using a factorial design. Digestible P requirements for piglets from 10 to 20 kg, growing pigs from 30 to 50 kg, finishing pigs from 50 kg onwards, pregnant and lactating sows were 3.6, 2.3, 2.0, 2.2 and 2.9 g P/kg feed, respectively. Large differences in recommendations of the P requirements exist between those reported in the literature and calculated data presented. Those for piglets in the literature were higher. For sows further information concerning the P requirement in different phases of pregnancy and lactation is required to allow a more precise estimation of the P requirement. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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“…Few mineral balance studies with baby pigs have been conducted. Danish (1), German (2,3), Canadian (4) and American (5,6) balance trials concerned with calcium and phosphorus utilization of young pigs receiving sow's milk, sow's milk substitutes or synthetic milk diets have been reported.…”

mentioning

confidence: 99%

Mineral Balance Studies with the Baby Pig: Effects of Dietary Phosphorus Level upon Calcium and Phosphorus Balance

Miller

Ullrey

Zutaut

et al. 1964

The Journal of Nutrition

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Calcium and phosphorus balance studies were conducted on 29 baby pigs receiving a synthetic milk diet containing phosphorus levels of 02 04 05 06 0.7 and 0.8% with 0.8% calcium. Growth rate, food intake and mineral 'retention were greatly depressed in pigs receiving 0.2% of phosphorus. Increasing dietary phos phorus levels to 0.5% resulted in increased total phosphorus retention (g) and per centage phosphorus retention. Increasing dietary phosphorus levels beyond 0 5% did not increase phosphorus retention (g) but decreased percentage phosphorus retention Dietary phosphorus levels below 0.5% resulted in reduced calcium retention (g) whereas increasing dietary phosphorus levels above 0.5% did not affect calcium bal ance. The dietary phosphorus requirement for optimal utilization of calcium and phosphorus is therefore about 0.5%.

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Untersuchungen über den Calcium-, Phosphor-, Magnesium- und Stickstoffumsatz des Ferkels in Beziehung zum Wachstum bei Muttermilch und Muttermilchersatz

Cited by 22 publications

References 8 publications

The efficacy of Aspergillus niger phytase in rendering phytate phosphorus available for absorption in pigs is influenced by pig physiological status.

The efficacy of Aspergillus niger phytase in rendering phytate phosphorus available for absorption in pigs is influenced by pig physiological status.

Apparent digestible phosphorus in the feeding of pigs in relation to availability, requirement and environment. 2. The requirement of digestible phosphorus for piglets, growing-finishing pigs and breeding sows.

Mineral Balance Studies with the Baby Pig: Effects of Dietary Phosphorus Level upon Calcium and Phosphorus Balance

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