scholarly journals The effect of calcium and magnesium supplementation on performance and bone strength of broiler chickens

10.5219/710 ◽  
2017 ◽  
Vol 11 (1) ◽  
Author(s):  
Filip Karásek ◽  
Hana Štenclová ◽  
Ondřej Šťastník ◽  
Eva Mrkvicová ◽  
Leoš Pavlata ◽  
...  
Keyword(s):  
Bone Strength ◽  
Broiler Chickens ◽  
Magnesium Supplementation ◽  
Calcium And Magnesium

scholarly journals A New Statistical Biomechanics Modeling of Physical and Biochemical Bone Strength Parameters

2000 ◽  
Author(s):  
Alfred B. O. Soboyejo ◽  
Karl E. Nestor
Keyword(s):  
Bone Strength ◽  
Biochemical Parameters ◽  
Broiler Chickens ◽  
Management Practices ◽  
Physical Parameters ◽  
Structural Failure ◽  
Practical Applications ◽  
Good Management ◽  
Biomechanical Parameters

Abstract New multiparameter biomechanics models are developed in this work for the characterization of bone strengths in broiler chickens and turkeys, as functions of the major physical and biochemical parameters, which can contribute to mechanical properties of bone strengths in these birds, under good management practices. Theoretical and experimental methods have been developed in this study to model bone strength as functions of (a) the physical parameters only and (b) the biochemical parameters only, which can affect bone strength. The choice of any particular methodology will depend on the availability of either the physical or biochemical parameters, which can be obtained from experimental data. Possible useful practical applications of the statistical biomechanics principles developed in this technical paper, particularly in the field of bone strength enhancement in turkeys and broiler chickens will be discussed. In view of the problems described, the major objectives of the present study are as follows: (1) To develop new multiparameter biomechanics models for the characterization of bone strengths in turkeys and broiler chickens as functions of the major physical only, or biomechanical parameters only, which can contribute to bone strength in these birds, under conditions of good management of these birds. This study will consider only the compressive buckling as the mode of structural failure in the cellular material of the bone. (2) To highlight briefly the possible practical applications of the statistical biomechanics principles, which will be developed in this study to the genetic improvement of bone strengths in broiler chickens and turkeys.

Effects of conventional daily magnesium supplementation, breed of ewe and continued potassium fertilizer applications on plasma magnesium and calcium levels of ewes

1963 ◽  
Vol 61 (3) ◽  
pp. 411-415 ◽  
Author(s):  
N. S. Ritchie ◽  
R. G. Hemingway
Keyword(s):  
Magnesium Level ◽  
Plasma Calcium ◽  
Potassium Fertilizer ◽  
Lower Plasma ◽  
Magnesium Supplementation ◽  
Before And After ◽  
The Mean ◽  
Calcium And Magnesium ◽  
Plasma Magnesium ◽  
Muriate Of Potash

1. Muriate of potash applied at rates of 0, 1 and 2 cwt./acre to herbage which had also received similar treatments in the previous year did not influence plasma magnesium or calcium values in lactating ewes.2. 24 Cheviot ewes had slightly lower plasma calcium and magnesium levels than 24 Half-bred ewes of the same age both before and after lambing.3. 6·6 g. of magnesium oxide given as a daily drench did not increase plasma magnesium values as measured by blood samples taken 24 hr. after drenching. Values were however increased by 0·5 mg. Mg/100 ml. four hours after drenching.4. No clinical cases of hypomagnesaemic tetany occurred, even although the mean plasma magnesium level of all the ewes in the experiment was only about 1·0 mg./lOO ml.5. Plasma magnesium values of ewes before lambing were significantly (P < 0·001) correlated with post-lambing levels. Values for the ewes during 1962 were equally significantly correlated with levels for the same sheep at comparable dates in 1961.

scholarly journals Effect of the use of golden mussel flour contaminated with lead as a source of calcium on the performance of broilers

2019 ◽  
Vol 40 (6) ◽  
pp. 2783
Author(s):  
Lucas Wachholz ◽  
Ricardo Vianna Nunes ◽  
Affonso Celso Gonçalves Junior ◽  
Cinthia Eyng ◽  
Leandro Dalcin Castilha ◽  
...  
Keyword(s):  
Bone Strength ◽  
Bone Quality ◽  
Broiler Chickens ◽  
Total Bilirubin ◽  
Experimental Unit ◽  
Feed Conversion ◽  
Linear Effect ◽  
Pb Contamination ◽  
Four Levels ◽  
Golden Mussel

The objective of this study was to evaluate the use of lead contaminated golden mussel flour (GMF) as a source of calcium for broiler chickens from 14 to 42 days of age and to verify the probable effects on performance, tissue contamination, blood parameters, Pb digestibility, and bone quality. The experiment was conducted in a completely randomized design (DIC), with four levels of Pb contamination (71.33, 147.55, 223.78, and 300 mg kg-1 Pb) in GMF, with five replicates and three birds per experimental unit. Sixty-four-day-old Cobb male broilers housed in metabolism cages were used. GMF was added to rations instead of calcitic limestone. The zootechnical variables were evaluated: feed intake, weight gain, and feed conversion, as well as the digestibility of nutrients. In addition, the serum biochemistry of the birds transaminases, total bilirubin, calcium, and phosphate was studied and the concentration of lead in the tissues and the bone quality of the birds was determined. The tibia was collected for evaluation of bone quality. The levels of Pb contamination in the golden mussel did not change the performance of the birds (P ? 0.05) or the Pb levels in the muscle Pectoralis major, skin, liver, feather, bones, and serum, or the serum levels of ALT, GGT, and total bilirubin, however, there was an effect of Pb levels (P < 0.01) on AST concentrations. Pb levels altered the values (P < 0.01) of the apparent digestible Pb and the coefficient of apparent digestibility of Pb, with an increasing linear effect. There was no effect (P ? 0.05) on bone stiffness, however flexibility and bone strength were altered (P < 0.05). Serum Ca and P concentrations did not show changes (P ? 0.05) due to the use of Pb levels in GMF. In this study, it can be observed that the use of GMF with Pb up to 300 mg kg-1 as a source of Ca in broiler diets does not alter performance, however the use of GMF contaminated with Pb above 73.33 mg kg-1 promotes contamination of the tissues of the animals with Pb, making it impossible to consume the birds. It was concluded that the increase in Pb concentrations in GMF increases the digestibility and metabolism of this metal and causes an increase in the production of AST by the liver. Pb levels in GMF above 214.11 mg kg-1 impair bone strength and flexibility.

Lack of blood pressure effect with calcium and magnesium supplementation in adults with high-normal blood pressure

1995 ◽  
Vol 5 (2) ◽  
pp. 96-107 ◽  
Author(s):  
Monica E. Yamamoto ◽  
William B. Applegate ◽  
Michael J. Klag ◽  
Nemat O. Borhani ◽  
Jerome D. Cohen ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pressure Effect ◽  
Normal Blood ◽  
Normal Blood Pressure ◽  
Magnesium Supplementation ◽  
Blood Pressure Effect ◽  
Calcium And Magnesium
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