Napraforgodara-tartalmu broilertapok enzimkiegeszitesenek hatasa a csirkek teljesitmenyere.
1996
Sherif K. | Gippert T. | Gerendai D.
This experiment was conducted to study the effects of sunflower meal and enzyme supplementation on the performance of broiler chicks during growing and finishing periods. Ross meat-type chicks were used. Eight experimental diets were formulated and used from 20 to 47 days of age. The control diet contained 21.47 soybean meal (treatment 1) and a preparation of solvent-extracted sunflower meal (90.4 sunflower meal, 8 sunflower oil, 1.5 lysine, and 0.1 methionine) was used at levels of 5, 10 and 15 of the diet (in treatments 2, 3 and 4, respectively). To replace soybean meal, a sunflower meal preparation (SFM) was used in amounts equivalent in protein to that supplied by soybean meal. Four crude enzyme preparations were added to diets containing 15 sunflower meal: Phylacell 0.6 g/kg (treatment 5); Energex (TM) 0.5 g/kg (treat-ment 6); Energex (TM) 0.5 g/kg and Bio-Feed (TM) Pro 0.25 g/kg (treatment 7); Kemzyme (R) Dry 1 g/kg (treatment 8). The experimental diets were formulated to contain almost the same crude protein and metabolizable energy (ME) as the control diet. The criteria of response were body weight, growth rate, body weight gain, feed consumption and feed conversion. Slaughter tests at the end of experiment were made only in treatment groups 1, 2, 3 and 4. Regarding the whole period of study, no significant differences were found among treatments in body weight, growth rate or body weight gain. The groups fed diets containing 10 and 15 of SFM, 15 SFM plus Energex (TM) or 15 SFM plus Kemzyme (R) Dry consumed more feed than the control group. Feed conversion for the group fed 15 SFM was worse than that of the control group, but the enzyme supplementation improved feed conversion. No significant differences were found among treatments in carcass composition, abdominal fat content or dressing percentage. Generally, it can be concluded that soybean meal could be partly replaced with solvent-extracted sunflower meal supplemented with lysine, methionine and energy in grower and finisher diets for broiler chicks without adverse effects on body weight gain or growth rate. Taking into consideration that enzyme supplementation improved feed conversion of broiler chicks fed diets containing a high level of sunflower meal in the experiment.
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