THE INFLUENCE OF THE RELATIONSHIP BETWEEN ENERGY AND THE MAIN ESSENTIAL AMINO ACIDS OVER THE PRODUCTIV PERFORMANCES OF THE LAYING HENS
Keywords:
laying hens, energy level, amino acids, energo-proteic relation, energoaminoacids relationAbstract
It is recommended to correlate the energetic level with the protein level in
order to establish the nutritious characteristics of a mix forage (MF) and
moreover its correlation to the essential aminoacids level. To establish the
influence of the relationship of an essential aminoacid (AAe) to the
metabolisable energy (ME), there was carried out an experiment at the
Didactic Station of USAMVB Timisoara on 100 Shaver 579 hibrid layer
hens. The hens were divided in four experimental groups and were
administered diverse versions of the MF with an optimum level of
metabolizable energy (to the NRC, 1994), but with different levels of crude
protein (CP) and essential aminoacids, achieving various energo-proteic and
energo-aminoacids relations. The best results, materialized by the weight
mass-egg (50.07±2.33) but also by the specific intake obtain (2.55 kg /kg MF
mass-egg)were observed to the group that had a reduced level of protein
(15.2%) but supplemented with L-lisine and DL-metionin, having as a result
the following data: 182 kcal ME/%CP, 2.96 g lisine/1000 kcal ME and 1.51
g metionine/1000 kcal ME.
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