Effects of laminarin on laying performance,water-stained egg,and blood physiological and biochemical parameters of laying hens

LU Fei; LU Yin-biao; YUAN Run-xi; DING Hao-miao; GUO Bin; LI Zhu-ai; WANG Cai-sheng

doi:10.13557/j.cnki.issn1002-2813.2024.24.010

Abstract：The experiment aimed to investigate the effects of laminarin on the laying performance,water-stained egg,and blood physiological and biochemical parameters in laying hens.A total of four thousand 430-day-old Hyline Gray laying hens were randomly divided into four groups,with four replicates per group and 250 laying hens per replicate.The control group,experimental group Ⅰ,Ⅱ,and Ⅲ were supplemented with 0,1,5,and 10 mg/kg of laminarin in the drinking water,respectively.The pre-test was seven days,and the formal test period was 42 days.The results showed that compared with the control group,the egg production rate in experimental group Ⅲ was significantly increased(P＜0.05),and the feed-to-egg ratio was significantly reduced(P＜0.05).The water-stained egg rate and broken egg rate were significantly decreased(P＜0.05).Haugh units and shell strength of the eggs were significantly improved(P＜0.05).Compared with the end of the preliminary trial(group CK1),the levels of packed cell volume(PCV),red blood cells(RBC),hemoglobin(Hgb),mean corpuscular volume(MCV),and white blood cells(WBC)in the blood of water-stained egg-laying hens in experimental group Ⅲ were significantly increased(P＜0.05),the content of total bile acids(TBA)and the activity of lipopolysaccharide(LPS)in the serum of the hens were significantly increased(P＜0.05),the concentrations of total cholesterol(TC),calcium(Ca),and phosphorus(P)were significantly increased(P＜0.05),the concentrations of albumin(ALB)and creatinine(CREA)were significantly decreased(P＜0.05),and the content of urea(UREA)was significantly decreased(P＜0.05).The study indicates that the addition of 10 mg/kg laminarin in drinking water can improve the blood physiological and biochemical parameters of hens laying water-stained eggs,reduce the incidence of water-stained eggs,enhance the egg production performance,and improve egg quality.