EFFECT OF NIACIN ON EGG PRODUCTION AND LIPID METABOLISM OF LAYING HENS
- VernacularTitle:日粮烟酸水平对产蛋鸡生产性能及脂肪代谢的影响
- Author:
Lie WEN
;
Hemin WANG
- Publication Type:Journal Article
- Keywords:
laying hens niacin lipid metabolism
- From:
Acta Nutrimenta Sinica
1956;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
A total of 96 26-week-old Hisex Bro-wn laying hens were divided into 3 groups (32 each) to investigate the effect of niacin on egg production and lipid metabolism of laying hens. Three levels of dietary niacin were used (0, 20 and 60mg/kg diet) for the 8-week experimental period.Supplementation of dietary niacin caused plasma cholesterol, ?-lipoprotein, triglycerides and free fatty acid to decrease 40.9%, 35.7%, 18.2% and 54.3% respectively and liver fat, muscle fat and abdominal fat to decrease 26.7%, 33.4% and 12.3%, respectively, compared with control. Increasing of dietary niacin resulted in a significantly decreases in plasma estradiol (E2) and the activity of hepatic malate dehydrogenase (MD) to regulate lipid matabolism.All of the results demonstrated that niacin could inhibit the lipid synthesis in hen's liver. Niacin deficiency could caused hen liver fragile and yellow in color, liver cells damaged and further fatty liver syndrome in hens.It is suggested that the supplementation of 20mg niacin/kg of diet is appropriate to laying hens if the basal diet contains 0.20% tryptophan and 23.8mg/kg diet of niacin originally.
