Title of Article :
Response of layers fed diets deficient in protein and sulphur amino acids supplemented with lipid
Title Of Periodical :
IRAN AGRICULTURAL RESEARCH
Descriptors :
Dietary lipid,S.A.A,layers,Albumin,Yolk protein,Egg weight,Egg production
Abstract :
An experiment was conducted to investigate the reponse of brown egg layers to supplemental fats in feeds inadequate in protein and total sulphur amino acids (TSAA).The physical and chemical composition of the egg was also examined.The deficient diets were prepared by diluting a basal diet with a protein-free,i-soenergetic dilution diet.The supplemental fats consisting of a mixture of palm oil and olein,were added at levels of 30 and 32 g kg-1 respectively.The TASS content of the first five diets ranged from 340 to 700 mg kg-1.Diets 6-10 were similar to diets 1-5 except they were supplemented with fats.Increasing daily TASS and protein increased egg weight and egg output significantly.Added fats improved egg weight and egg output significantly.Albumen output increased significantly after the addition of fat,whereas yolk protein output remained un-changed.Total protein output rose by increasing protein and TASS intakes.Total fat content of the yolk increased due to added fats.The efficiency of protein and TASS utilization was improved after the addition of fats to the diets,especially when protein and TASS were inadequate.
