111 Effects of exogenous phytase supplementation and dietary phosphorus concentration on metabolism and digestibility of beef cattle

2017 ◽  
Vol 95 (suppl_2) ◽  
pp. 1-50
Author(s):  
C. J. Long ◽  
H. H. Stein ◽  
T. L. Felix
Keyword(s):  
Beef Cattle ◽  
Phosphorus Concentration ◽  
Dietary Phosphorus

Phosphorus nutrition of beef cattle. 3. Effect of supplementation on the phosphorus content of blood and on the phosphorus and calcium contents of hair and bone of grazing steers

1973 ◽  
Vol 13 (65) ◽  
pp. 625
Author(s):  
RDH Cohen
Keyword(s):  
Beef Cattle ◽  
Phosphorus Content ◽  
Phosphorus Deficiency ◽  
Calcium Content ◽  
Inorganic Phosphorus ◽  
Phosphorus Concentration ◽  
Beef Steers ◽  
Dietary Phosphorus ◽  
Calcium Status ◽  
Phosphorus Levels

The effect of phosphorus supplements of 35 and 70 g per head per week on the calcium and phosphorus contents of bone and hair and on plasma inorganic phosphorus levels of steers was compared with those of unsupplemented steers which grazed carpet grass (Axonopus affinis) pasture of low phosphorus content at Grafton, New South Wales. The supplements had no effect on plasma inorganic phosphorus concentration. Hair phosphorus content was not affected by either dietary phosphorus or season. Hair calcium was not influenced by pasture calcium but was related to season, with highest levels in summer and lowest in winter. Supplementation increased the amount of phosphorus in dry fat-free rib-bone (P < 0.05) but this effect was not apparent in the first three months of supplementation. The amount of calcium in bone (Y) was influenced by pasture calcium content (X1) and bone phosphorus content (X2). This relationship was described by the equation: Y = 51.0 + 140.81X1 - 3.33X2(R2 = 0.71; P < 0.001) It is suggested that bone phosphorus levels below 14.3, 13.5, and 12.7 per cent of dry fat-free bone may represent a phosphorus deficiency state in 15-27-month-old steers when pasture calcium levels are 0.18, 0.15, and 0.12 per cent respectively. Further, when estimates of the calcium status of beef steers are made from measurements of bone calcium content, corrections should be applied for bone phosphorus content. It is concluded that measurement of bone phosphorus and calcium provides the most sensitive indication of the phosphorus and calcium status of beef cattle and that when phosphorus supplementation has no effect on liveweight of beef steers its effect on mineralization of bone tissue may justify its use, particularly in areas where poor bone development and lameness occur.

Correction - Phosphorus nutrition of beef cattle. 3. Effect of supplementation on the phosphorus content of blood and on the phosphorus and calcium contents of hair and bone of grazing steers

1973 ◽  
Vol 13 (65) ◽  
pp. 625
Author(s):  
RDH Cohen
Keyword(s):  
Beef Cattle ◽  
Phosphorus Content ◽  
Phosphorus Deficiency ◽  
Calcium Content ◽  
Inorganic Phosphorus ◽  
Phosphorus Concentration ◽  
Beef Steers ◽  
Dietary Phosphorus ◽  
Calcium Status ◽  
Phosphorus Levels

The effect of phosphorus supplements of 35 and 70 g per head per week on the calcium and phosphorus contents of bone and hair and on plasma inorganic phosphorus levels of steers was compared with those of unsupplemented steers which grazed carpet grass (Axonopus affinis) pasture of low phosphorus content at Grafton, New South Wales. The supplements had no effect on plasma inorganic phosphorus concentration. Hair phosphorus content was not affected by either dietary phosphorus or season. Hair calcium was not influenced by pasture calcium but was related to season, with highest levels in summer and lowest in winter. Supplementation increased the amount of phosphorus in dry fat-free rib-bone (P < 0.05) but this effect was not apparent in the first three months of supplementation. The amount of calcium in bone (Y) was influenced by pasture calcium content (X1) and bone phosphorus content (X2). This relationship was described by the equation: Y = 51.0 + 140.81X2 - 3.33X2(R2 = 0.71; P < 0.001) It is suggested that bone phosphorus levels below 14.3, 13.5, and 12.7 per cent of dry fat-free bone may represent a phosphorus deficiency state in 15-27-month-old steers when pasture calcium levels are 0.18, 0.15, and 0.12 per cent respectively. Further, when estimates of the calcium status of beef steers are made from measurements of bone calcium content, corrections should be applied for bone phosphorus content. It is concluded that measurement of bone phosphorus and calcium provides the most sensitive indication of the phosphorus and calcium status of beef cattle and that when phosphorus supplementation has no effect on liveweight of beef steers its effect on mineralization of bone tissue may justify its use, particularly in areas where poor bone development and lameness occur.

Effect of dietary phosphorus concentration on estrous behavior of lactating dairy cows

2004 ◽  
Vol 61 (2-3) ◽  
pp. 437-445 ◽  
Author(s):  
H. Lopez ◽  
Z. Wu ◽  
L.D. Satter ◽  
M.C. Wiltbank
Keyword(s):  
Dairy Cows ◽  
Phosphorus Concentration ◽  
Dietary Phosphorus ◽  
Lactating Dairy Cows ◽  
Estrous Behavior

scholarly journals Effect of suboptimal levels of non-phytate phosphorus and exogenous phytase on precaecal digestibility of phosphorus and calcium in laying hens

2017 ◽  
Vol 62 (No. 11) ◽  
pp. 473-481
Author(s):  
A. Musilova ◽  
M. Lichovnikova ◽  
L. Kupcikova ◽  
V. Anderle
Keyword(s):  
Egg Production ◽  
Phosphorus Content ◽  
Laying Hens ◽  
Phosphorus Concentration ◽  
Posterior Half ◽  
Daily Calcium Intake ◽  
Ileal Digestibility ◽  
Phytate Phosphorus ◽  
Dietary Phosphorus ◽  
Significant Difference

The precaecal digestibility of phosphorus and calcium in laying hens was evaluated at two dietary levels of non-phytate phosphorus (NPP; 1.58 and 2.03 g/kg) and two levels of exogenous 3-phytase (F; 0 and 300 phytase units (FTU)/kg). A total of 192 ISA Brown hens were used for the study, and were housed in enriched cages (8 per cage). At the end of the experiment, which was the peak of the egg production, the content of the posterior half of the ileum from each hen was collected. The lower level of NPP significantly (P &lt; 0.05) improved the precaecal phosphorus digestibility coefficient. There was no significant difference in the amount of absorbed phosphorus between the lower and the higher level of NPP. The level of NPP with supplementation of exo-genous phytase had a significant effect (P &lt; 0.001) on the concentration of phosphorus in ileum, while the higher level of NPP increased phosphorus concentration in the ileum and phytase decreased phosphorus content in the ileal digesta. The phytase had no significant effect on phosphorus precaecal digestibility. There was no significant effect of the both factors, level of NPP, and exogenous phytase on the daily calcium intake, the amount of absorbed calcium, the content of calcium in ileal digesta, and on the precaecal digestibility of calcium. However a significant effect (P &lt; 0.05) of the interaction between NPP and phytase was observed on the amount of absorbed calcium and on the precaecal digestibility coefficient. It can be concluded that the estimation of phosphorus ileal digestibility depends on the level of dietary phosphorus.

Effects of dietary phosphorus concentration and body weight on postileal phosphorus digestion in pigs

2018 ◽  
Vol 242 ◽  
pp. 86-94 ◽  
Author(s):  
J.B. Liu ◽  
P.C. Xue ◽  
S.C. Cao ◽  
J. Liu ◽  
L. Chen ◽  
...  
Keyword(s):  
Body Weight ◽  
Phosphorus Concentration ◽  
Dietary Phosphorus
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