Feeding of calves with rations containning different levels of magnesium
2004
Girginov, D. | Enev, E. | Pavlov, D. | Videv, V. (Trakijski Universitet, Stara Zagora (Bulgaria))
The influence of different levels of magnesium-from 0.3% to 1.4%, in the ration weanded calves was studied. The experiments were carried out with 12 male calves from the Black-and-white breed at 56-105 days of age, fed with a starter mixture and alfalfa hey at libitim. The animals were divided in four groups. Magnesium oxide was added for obtaining the magnesium level in the ration. As a result of the experiment it was found that: -the increased magnezium content influensed negatively the consumption of forage, wiight and average daily gain; -at content of 1.4% magnesium in the blood plasma were changed the most; -the content of magnesium in the ration corelated very well with the changes which appeared in the weight, consumption, gain and content of magnesium in the blood. This allowed for utilization of linear regression coefficients for determination of these characteristics by the level of magnesium in the ration.
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Эту запись предоставил Institute of Agricultural Economics