the effect of different levels of copper and cichorium intybus on egg yolk cholesterol content and performance of laying hens

Authors

محمد وحید کیمیایی طلب

کارشناس ارشد، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه رازی، کرمانشاه ـ ایران شهاب قاضی

استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه رازی، کرمانشاه ـ ایران سارا میرزایی گودرزی

استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه بوعلی سینا، همدان ـ ایران

abstract

this experiment was conducted to investigate the effects of various levels of cichorium intybus andcopper on performance and egg yolk cholesterol. total of 324 layer hens (hy-line w-36) were used in arandomized complete blocks with nine treatments, three replications of 12 birds in each from 38 to 50weeks of age. experimental diets include control, four levels of copper (150, 200, 250 and 300 mg/kg)and four levels of cichorium intybus (15, 20, 25 and 30 percent of diet). different levels of cichoriumintybus and copper significantly decreased serum and yolk cholesterol than control. the level of 300mg/kg copper significantly reduced serum and yolk cholesterol but significantly decreased egg weight,egg production and increased feed conversion ratio compared to control. levels of 25 and 30 percent ofcichorium intybus significantly decreased egg production than control treatment. yolk color improved bydifferent levels of cichorium intybus than control and copper levels. in conclusion, the best result forlower yolk cholesterol were achieved by those laying hens fed a diet with 150 mg/kg copper of diet or 15percent of cichorium intybus.

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تولیدات دامی

جلد ۱۵، شماره ۱، صفحات ۱۱-۲۰

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