THE INFLUENCE OF CONDITIONS OF PRE-INCUBATION OF EGGS ON THE FINAL RESULTS OF THE INCUBATION PROCESS

M.G. Usturoi, R.M. Radu-Rusu, Roxana Nicoleta Raţu, Al. Usturoi

Abstract
   Preparation of eggs for incubation (pre-incubation) is the operation that gradually moves from storage temperatures to those specific to normal embryonic development, in order to improve the final results of the incubation process and the quality of the chicks obtained. Four batches of eggs (600 eggs/batch) were subjected to artificial incubation, differentiated by temperature, relative humidity and the duration of pre-incubation (batch Lc =+26….+28°C, 60-65%, 12 hours; Lexp-1=+28….+30°C, 65-70%, 10 hours; Lexp-2=+30….+32°C, 70-75%, 8 hours; Lexp-3 = +32….+34 °C, 75-80%, 6 hours). The ratio of clear eggs was 4.33-4.67%, resulting in a fertility rate of 95.33-95.67%. The conditions of pre-incubation of the eggs set their mark on the embryonic mortality rate (4.00-7.33%) and of the technological losses (2.67-4.00%), indicators that generated different levels of hatching (88,67% at Lexp-2; 87.33% at Lexp-1; 86.33 at Lexp-2; 84.0 at Lc) and hatchability (93.01% at Lexp-2; 91.29% at Lexp-2 1; 90.56 to Lexp-2; 88.11 to Lc). The conclusion of the study was that the pre-incubation of the eggs for 8 hours at temperatures of +30...+32 ° C and relative humidity of 70-75%, allows to improve the hatching capacity of the eggs obtained from the parents of the Ross-308 hen hybrid.

Key words: Ross-308 parents, eggs, pre-incubation, hatchability, hatching