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Details van artikel 29 van 51 gevonden artikelen
| Titel: |
GROWTH EVALUATION OF TURKEY HEAVY HYBRID BY MEANS OF ASYMMETRIC S-FUNCTION |
| Auteur: |
Zoran Škrtić Gordana Kralik Zlata Gajčević |
| Verschenen in: |
Poljoprivreda |
| Paginering: | Jaargang 13 (2007) nr. 1 pagina's 141-144 |
| Jaar: |
2007 |
| Inhoud: |
The research into growth characteristics of turkey hybrid was carried out on 60 one-day-old turkeys (30 toms and 30 hens) of Nicholas 700 provenience. The research lasted for 19 weeks. Each turkey was marked with a leg ring. During the experiment, turkeys were fed commercial mixtures. Evaluation of the inflection point and of separate growth phases was obtained by means of asymmetric S-function (Kralik and Scitovski, 1993): f tAbec t( )( )/=+−11 γ γ, ticbB=+ + + + γ γ γ γ γ γln( ) ( )( )23 1 5, ticbC=+ − + + γ γ γ γ γ γln( ) ( )( )23 1 5End weight of turkey toms was higher than the one of hens by 34.63% (14811±906 g : 11005±993 g). Differences in final weights between sexes, as well as in weights over the whole fattening period were statistically highly significant (P<0.001). Average absolute and relative gains (gain rates) of toms in comparison to hens were 776 g and 12.45%, and 567 g and 12.11%, respectively. By the parameters of asymmetric S-function, intensification of progressive growth phase in turkey toms started after the 5thweek, and in turkey hens it was prolonged for several days. Determined biological maximum in toms was 17.966 kg, and in hens 12.889 kg. Intensive growth of hens lasted up to the beginning of the 15thweek, while toms grew intensively up to the end of the 15thweek. Positions of the inflection point in hens were determined at the beginning of the 10thPhD. Zoran Škrtić, Assistant Professor; Dr.Sc.Dr.h.c. Gordana Kralik, Full Professor; MSc. Zlata Gajčević -Faculty of Agriculture of Josip Juraj Strossmayer University of Osijek, Department of Special Zootechnics, Trg Sv. Trojstva 3, 31 000 Osijek, Croatia, e-mail:week, and in toms in the middle of that week. |
| Uitgever: |
Faculty of Agriculture in Osijek (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 29 van 51 gevonden artikelen
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