The use of grade one wheat middlings on Layer’s performance

To evaluation of chemical composition and nutritive value of grade one wheat middlings wastes and to get the best levels of its use in layer diets these experiments were investigated.In first the chemical composition and energy and protein content evaluated and then research conducted by 240 hyline w36 layers from day 168 to 280 for 16 weeks(24 to 40 weeks of age). In this experiment four treatments were used and the rations were arranged in four levels of grade one wheat middlings and includes (0, 7.5, 15,22.5%) of grade one wheat middlings in layer diets. Four replicates with 15 birds were arranged in each.All of diets were Isoenergetic and isonitrogenous.. Experiment statistical was in complete random design (CRD), data analysed by SAS programme and means were examined by Duncan multiple test.The metabolizable energy and protein content were 3220 kcal/ kg and 14.2% respectively. No significant differences were found in body weight (BW), feed conversion ratio(FCR) and and egg production percentage (P%) between different levels of wheat middlings in diets (p>0.05).In egg composition including egg weight, egg mass, albumen%, yolk%, shell%, dirty eggs% ,no significant were found (p>0.05).There were significant variables in cost of 1kg of egg production. The treatments fed with wheat middlings have had less cost than control treatment (p<0.05).However, it would suggested that 22.5% of wheat middlings in layer ration could leads to decrease the ration price and egg production cost and approach more benefits for poultry industry.