Nutritional effects on performance and nitrogen excretion in laying hens dominant D-102

Abstract:

The main physiologic performance indicators and final products of nitrogen metabolism excretion (uric acid and urea biosynthesis) were analyzed in 320 control and 1,960 experimental laying hens of the Czech original laying hybrid Dominant D-102 in practical farming conditions. The whole laying period lasted 252 days (9 laying intervals per 28 days). Isonitrogenic and isoenergetic feed mixture was used in these experiments. The following stimulators were applied with the commercial feed mixture "N": 0.1 % methionine (experimental group P1), 0.2 % methionine (P2), fortified probiotics for poultry, Leuzea carthamoides leaf meal (P4 - 2.5 %, P5 - 5 %) and Leuzea carthamoides seeds (P6 - 1 %, P7 - 2 %). Continual feeding of seven different experimental diets resulted in changes of physiologic performance indicators: laying intensity increased, average egg weight did not change significantly. Feed mixture savings per egg production were on average by 17 g higher in control laying hens in comparison with experimental ones. Experimental diet P3 containing original Czech fortified probiotics ECOVIT for poultry resulted in the significantly lower feed consumption per egg production - 28 g. Continual experimental application of seven diets influenced uric acid and urea biosynthesis in liver, kidney and pancreas in experimental laying hens as well as their uric acid and urea plasma concentrations.

Año de publicación:

1996

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Fuente:

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