THE INFLUENCE OF THE RELATIONSHIP BETWEEN ENERGY AND THE MAIN ESSENTIAL AMINO ACIDS OVER THE PRODUCTIV PERFORMANCES OF THE LAYING HENS

Abstract

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.

Keywords

• laying hens
• energy level
• amino acids
• energo-proteic relation
• energoaminoacids relation