THE APPLICATION OF POLYNOMIAL REGRESSIONS IN THE PERFORMING EVALUATION OF LAYING HENS FED WITH FODDERS USING AMINO ACIDS SUPPLEMENTATION
2007
ELIZA SIMIZ | D. DRINCEANU | ANA DRIHA | ILEANA BRUDIU
The experiment has been carried out in the Poultry Department from the Didactic Station of Banat`s University of Agricultural Sciences and Veterinary Medicine Timisoara, on 100 laying hens, 32-39 weeks old - the hybrid Shaver 579. We have distributed the hens in 4 groups, with fodder recipes including two protein levels (16.2% and respectively 15.2%) and different amino acid contents. As regarding the egg production weight, we have remarked group 4 (1.25 kg); this group was fed a combined feed with 15.20% crude protein, 0.82% lysine and 0.42% methionine. Simple correlations analysis and third degree polynomial regressions have led to the conclusion that there is a strong positive correlation between the obtained egg weight and the lysine or methionine intake. The highest correlation coefficient characterizes the experimental group 3 (0.882, p=0.004). The regression curves recorded for group 4 prove that the egg mass increases in the same time with ingestion up to the level of 19.83 g protein, 1069 mg lysine and 547 mg methionine, and then it does not react anymore concomitantly with the increase of the lysine or methionine ingestion.
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