@article { author = {دستار, بهروز and گلیان, ابوالقاسم and مسگران, محسن دانش and شاهرودی, فریدون افتخاری}, title = {-}, journal = {Iranian Journal of Agriculture Science}, volume = {35}, number = {3}, pages = {-}, year = {2004}, publisher = {}, issn = {}, eissn = {}, doi = {}, abstract = {An experiment was conducted to compare 2 levels of dietary protein (19 versus 23%) and 2 methods of feed formulation (total versus digestible amino acid) on Ross male broiler performance during 3-21 days of age. Four isocalloric (3200 Kcal MEn/Kg)experimental diets, supplemented with appropriate levels of synthetic essential amino acids to match the NRC (1994) recommendations, were fed to seven groups of five chicks to each treatment. Diets 1 and 3 contained 23 and 19% CP, respectively, along with 1.1% Lys and 0.9% SAA (NRC, 1994). Diets 2 and 4 contained 23 and 19% CP, respectively. L-Lysine and DL-Met were added (as a replacement for the starch present in diets 1 and 3) till digestible Lys and SAA became 1.04 and 0.846% (Amounts determined in previous experiments). A completely randomized design, with a factorial arrangement was employed to test the effects of the 2 dietary protein levels (19 versus 23% CP) as well as 2 methods of feed formulation (total versus digestible amino acid). Dietary protein did not show a significant effect on broiler performance but, broilers fed with diet formulated to meet the digestible rather than total amino acid requirements had a higher weight gain (485 versus 459 g). Their feed conversion was shown to be lower by 0.06 units.}, keywords = {broiler,Digestible amino acid,requirement}, title_fa = {استفاده از ضرایب قابلیت هضم لیزین و اسیدهای آمینه گوگرددار در بهینه سازی عملکرد جوجه‌های گوشتی}, abstract_fa = {}, keywords_fa = {اسید آمینه قابل هضم,اسیدهای آمینه گوگرد دار,جیره نویسی,لیزین}, url = {https://jijas.ut.ac.ir/article_18256.html}, eprint = {https://jijas.ut.ac.ir/article_18256_f5f128d0d3f959c68e320bed79690155.pdf} }