THE INFLUENCE OF PROTEIN, METHIONINE AND LYSINE FEEDED LEVEL, IN HENS PERFORMANCES DURING THE PLATEAU PART OF THE LAYING CURVE
Keywords:
laying hens, protein level, amino acids, lysine, methionine, correlation coefficientAbstract
The experiment has been carried out in the Poultry Department from the Didactic
Station of Banat`s University of Agricultural Sciences and Veterinary Medicine
Timişoara, on laying hens - the Shaver 579 hybrid, being in the plateau part of the
laying curve. We have distributed the hens in 4 groups (n=25), with fodder recipes
including two protein levels (16.2% - group 1 and respectively 15.2% groups 2,3
and 4) and different amino acid contents (about 0.77% lysine and 0.38% methionine
– groups 1 and 2; only 0.70% lysine and 0.34% methionine group 3, respectively
0.82% lysine and 0.42% methionine group 4). For the entire studied period, the
highest egg production and the lower specific consumption, was registered for group
4 and the lowest production performances were assigned in group 3, which had been
fed with a diet containing 15.2% crude protein and an amino-acids level lower with
10% than the NRC 1994 requirements. A strong positive correlation (r=0.80,
p=0.015) for the egg production versus protein, lysine and methionine intake was
obtained in lot 3.
References
Drinceanu, D. (2000) – Biotehnologii în alimentaŃia animalelor, Editura
Eurobit, Timişoara
Limper, Yırg (2001) – Rolul aminoacizilor în nutriŃia animală, Aminoacizi
esenŃiali de sinteză în nutriŃia animală, Degussa Hőlss AG, Bucureşti, p. 1-5
NRC (1994) –Nutrient requirements of poultry: ninth revised edition, National
Academy Press, Washington, DC.
Safar, AL. and Rose, S.P. (2002) –The response of laying hens to dietary
amino acids. World`s Poultry Science Journal, vol. 58, p.209-231.
