scholarly journals Influence of Phase Feeding Available Phosphorus on Egg Production Characteristics, Carcass Phosphorus Content, and Serum Inorganic Phosphorus Levels of Three Commercial Layer Strains

1984 ◽  
Vol 63 (8) ◽  
pp. 1553-1562 ◽  
Author(s):  
M. RODRIGUEZ ◽  
W.J. OWINGS ◽  
J.L. SELL
Keyword(s):  
Egg Production ◽  
Phosphorus Content ◽  
Inorganic Phosphorus ◽  
Available Phosphorus ◽  
Phosphorus Levels ◽  
Production Characteristics

scholarly journals The effect of dietary phytase and various available phosphorus levels on performance and egg quality in Japanese quail

2019 ◽  
Vol 20 ◽  
Author(s):  
Rafaella Rossetto ◽  
Maurício Barreta ◽  
Marcos José Migliorini ◽  
Fabíula Pecher ◽  
Lenílson Fonseca Roza ◽  
...  
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Quality Parameters ◽  
Available Phosphorus ◽  
Feed Conversion ◽  
Shell Quality ◽  
Randomized Experimental Design ◽  
Phytic Phosphorus ◽  
Phosphorus Levels

SUMMARY Birds show poor utilization of phytic phosphorus in their diets because of the lack of endogenous enzymes to digest phosphorus and make it bioavailable. Therefore, the objective of this study was to evaluate phytase supplementation in the diets of laying quails. Eighty quails were used in a completely randomized experimental design with five treatments and four replicates of four birds each. The treatments were as follows: 0.35% Pd; 0.20% Pd; 0.20% Pd + 500FTUs of phytase; 0.09% Pd; 0.09% Pd + 500 FTUs of phytase. The birds were housed in metallic batteries during a trial period of 21 days, for evaluation of egg production, egg weight, feed intake and feed conversion. After being collected, the eggs were sent to the nutrition laboratory of the department of zootechnics of the CEO/Udesc, where analyses of albumin, yolk and shell quality were performed. The results were subjected to analysis of variance, and the differences between the averages were compared using the Tukey test at 5% of significance. No differences (P> 0.05) were observed in terms of performance and egg quality parameters. We conclude that the inclusion of phytase in the diet of laying quails can be accomplished without compromising the performance and quality of the eggs. Additionally, 0.09% of 22 disponible phosphorus can be used to grant adequate performance for 21 days.

A study of serum mineral changes in lactating Welsh mountain ewes under different grazing conditions with special reference to hypomagnesaemia

1964 ◽  
Vol 62 (3) ◽  
pp. 341-351 ◽  
Author(s):  
J. L. L'Estrange ◽  
R. F. E. Axford
Keyword(s):  
Phosphorus Content ◽  
Marked Decrease ◽  
Serum Magnesium ◽  
Inorganic Phosphorus ◽  
Fertilizer Treatment ◽  
Early Lactation ◽  
High Nitrogen ◽  
Short Term ◽  
Phosphorus Levels ◽  
Mineral Changes

Short-term grazing trials with daily blood sampling were carried out on Welsh mountain ewes in early lactation.1. A small decrease in serum magnesium levels and a very marked decrease in serum inorganic phosphorus levels, were observed in two groups of four ewes, when one group was transferred from an old pasture to a fertilized (high nitrogen and potash) fresh spring ley, and the others to a similar fresh ley but untreated. There was little effect from the fertilizer treatment on the magnesium, calcium, potassium, sodium or phosphorus content of the herbage.

scholarly journals Available phosphorus in poultry. 1. Effect of phosphorus levels on the performance of laying hens and their egg quality, hatchability, bone analysis and strength in relation to calcium and phosphorus in blood plasma.

1979 ◽  
Vol 27 (2) ◽  
pp. 176-183
Author(s):  
A.R. El Boushy
Keyword(s):  
Shell Thickness ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Breaking Strength ◽  
Available Phosphorus ◽  
Inorganic P ◽  
Shell Quality ◽  
Calcium And Phosphorus ◽  
Phosphorus Levels

1. For 6 months 432 medium heavy laying hens were given diets which supplied 0.16, 0.20, 0.40, 0.60, 0.80 or 1.00% available phosphorus. Egg production was greatest by hens given 0.20 or 0.40% P and least by those given 0.16%. Feed intake did not differ among groups. Heaviest eggs, 62.2 g, were laid by hens given 1.00% P. Shell quality, determined from shell percentage, shell thickness and shell index, decreased as P in the diet increased. Hatchability, yolk and white indices of eggs and calcium, P and ash in tibiae of chicks one day old did not differ among groups. Ca in blood of hens did not differ among groups but inorganic P in plasma increased with increasing P in the diet. Ash, Ca and P in tibiae and breaking strength of tibiae of hens increased with increasing P in the diet. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Phosphorus nutrition of beef cattle. 2. Relation of pasture phosphorus to phosphorus content of blood, hair and bone grazing steers

1973 ◽  
Vol 13 (60) ◽  
pp. 5 ◽  
Author(s):  
RDH Cohen
Keyword(s):  
Phosphorus Content ◽  
Correlation Coefficients ◽  
Inorganic Phosphorus ◽  
Beef Steers ◽  
Grazing Cattle ◽  
Low Phosphorus ◽  
Phosphorus Status ◽  
The Relationship ◽  
Phosphorus Levels ◽  
Do So

The phosphorus content was measured every three months in pasture and in blood, hair and bone of beef steers that had grazed pastures of low phosphorus content for 12 months. This was done to determine the effect that changes in pasture phosphorus levels had on the phosphorus content of animal tissue. The correlation coefficients between pasture phosphorus content and either the phosphorus content of hair or the concentration of inorganic phosphorus in plasma were not significant. The relationship between the phosphorus content of pasture (x) and dry fat-free rib-bone (y) was given by the equation y = 9.5 + 33.3x (r = 0.97; P < 0.05). It was concluded that bone phosphorus content could provide the best estimate of the phosphorus status of grazing cattle because it significantly reflected variation in the phosphorus content of pasture whereas blood and hair failed to do so.

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.

PHOSPHORUS NUTRITION IN TWO NEBRASKAN WET MEADOW SOILS

1962 ◽  
Vol 42 (2) ◽  
pp. 289-295
Author(s):  
A. W. Moore ◽  
H. F. Rhoades
Keyword(s):  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Phosphate Fertilizer ◽  
B Value ◽  
Inorganic Phosphorus ◽  
Phosphorus Fertilization ◽  
Available Phosphorus ◽  
Triple Superphosphate ◽  
Wet Meadow ◽  
Soil Organic Phosphorus

Two wet meadow soils of the Loup series in the Nebraska Sandhills were selected for study because vegetation growing on Soil 1 showed a marked response to phosphate fertilizer whereas that on Soil 2 showed little or no response to phosphate fertilizer.Curves for yields of dry matter indicated that available phosphorus (Mitscherlich "b" value) was much lower in Soil 1 (10 pounds phosphorus per acre) than in Soil 2 (35 pounds phosphorus or more per acre).Using P32-labelled triple superphosphate, it was shown that during the growing season of 1955 the meadow vegetation on Soil 1 derived about twice as much phosphorus from fertilizer as from the soil, while the vegetation on Soil 2 obtained about equal quantities of phosphorus from soil and fertilizer sources.The groundwater from Site 2 contained about three times as much phosphorus as that from Site 1 (0.41 p.p.m. and 0.12 p.p.m. P, respectively).A laboratory study of the mineralization of soil organic phosphorus indicated that in Soil 2 microbiological action released inorganic phosphorus whereas in Soil 1 inorganic phosphorus was assimilated.Differences in phosphorus content of groundwater and in microbial activity were probably responsible for differential responses to phosphorus fertilization obtained in the field.

scholarly journals Dietary metabolizable energy, digestible lysine, available phosphorus levels and exogenous enzymes affect broiler chicken performance

animal ◽  
2021 ◽  
Vol 15 (5) ◽  
pp. 100206
Author(s):  
P. Cozannet ◽  
R. Davin ◽  
M. Jlali ◽  
J. Jachacz ◽  
A. Preynat ◽  
...  
Keyword(s):  
Broiler Chicken ◽  
Metabolizable Energy ◽  
Available Phosphorus ◽  
Exogenous Enzymes ◽  
Phosphorus Levels
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