Эффективность использования йодных подкормок и глины "Лескенит" в кормлении кур-несушек яичного направления
2009
Kizinov, F.I. | Kaloev, B.S. | Dzeranova, A.V.
It is shown that the local forages used in diets of laying hens had iodine difficiency. The adequate ration for the laying hens made of local forages contains of 139.09 mkg of iodine that makes 69,5 % from the demanded quantity of the element on a head per day. Natural mineralized marl ("Leskenit") differs from other bentonite clays by higher maintenance of calcium (to 25,0 %), iron (23,6 mg/kg), copper (40,5 kg/kg), zinc (126,2 mg/kg), cobalt (19,1mg/kg), iodine (2,2 mg/kg), the alkaline pH factor (pH = 8,46). Additional doses of iodine and "Leskenit" has raised the level of iodic nutrient of the tested laying hens that promoted increase of survival rate by 9,3 %, egg productivity by 9,3 %, hatchability of chickens by 3,2 %. Iodic supplements and "Leskenit" have positive effect on moult duration, feathering and egg productivity for 30 days of moult. The optimum iodic supplements and "Leskenit" doses have appeared of 1.5 mg of iodine per 1 kg of a forage and 1.0 mg of iodine + 5 % of "Leskenita" by 1 kg of a forage in the rations. Addition of additives of iodine and "Leskenit" promoted decrease of heavy metal content in a white and yolk of eggs. Economic efficiency of use of various doses of iodine extra fedd and "Leskenit" for laying hens is calculated and proved. Profitability of production has raised from 27,8 % in the control group to 32 % in the tested group due to decrease of feed consumption per a product unit
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