RATIO BETWEEN CALCIUM, PHOSPHORUS AND MAGNESIUM IN RATION FOR COWS IN DRY PERIOD
Abstract
The article provides data on calcium (Ca), phosphorus (P) and magnesium (Mg) content in the individual components, as well as in total mixed ration (TMR) for cows at first and second phases of dry period. The ration for the first phase of the dry period contains forage amounting to 77 % concentrates amounting to 23 %. The ration of the second contains excessive amount of concentrates (13,2 % excess versus 30 % recommended), the forages amounted to 56,8 %. Ca in lucerne haylage amounts to 6,9 g/kg of natural substance, what is less than a mean Ca content of the region (7,3 g/kg). Content of P and Mg in Lucerne haylage within average figures per region (1,2 and 1,1 g/kg respectively). Concentration of Ca in the maize silage is significantly lower than average figure per region (1,0 g/kg vs 1,9-2,1 g/kg). P and Mg content levels the average region figures (0,6 g/kg and 0,5 g-kg respectively). Ratio between Ca, P and Mg in the ration for the first phase of the dry period is 3,7:1:1,5 what does not match with the recommended ratio of 0,6:1:1. Analysis of the ration for the second phase of the dry period revealed the Ca: P: Mg ratio does not comply with the norm as well and amounts to 2,4:1:0,7 and 2,5:1:1,5. Biochemical blood test revealed Ca and P ratio distortion in 45 % of animals at dry period. Basing on the research the farm was given practical recommendations to improve the animals feeding at dry period.
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Review
For citations:
Turlyun V. RATIO BETWEEN CALCIUM, PHOSPHORUS AND MAGNESIUM IN RATION FOR COWS IN DRY PERIOD. Bulletin of NSAU (Novosibirsk State Agrarian University). 2018;(2):101-106. (In Russ.)
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