Effects Of Feeding Hens With Hydroxyl Methionine Chelated Mixed Minerals Instead Of Inorganic Mixed Minerals On Production Performance And Blood Biochemical Indexes Of Offspring Broilers

The experiment was conducted to study the substitution of hydroxymethionine chelated polyminerals for inorganic polyminerals in basal feed of hens,so as to study the effects on growth performance,slaughter performance,meat quality,antioxidant performance,immune performance and plasma biochemical indexes of their offspring broilers.Thus,the relationship between different contents of hydroxymethionine chelated polyminerals in broiler diets and the growth and development of offspring broiler was explored,which provided scientific basis for improving broiler production effect and the influence of trace elements on maternal effect.Single factor randomized design,a total of 432 50-week-old Hubbard white-feather broiler chickens with similar weight and healthy growth were randomly divided into groups I,II and III,with 6 replicates in each group,and 24 in each replicate.Group I was the control group.100 % copper,iron,zinc and manganese inorganic salts were added as trace element additives in the feed,and the contents were 10.0 mg / kg,50.0 mg / kg,110.0 mg /kg and 120.0 mg / kg,respectively.Group II was inorganic + organic.30 % inorganic minerals in the feed of group I were replaced by hydroxyl methionine chelates.Group III was pure organic,and 100 % hydroxyl methionine chelated minerals were added.Incubated eggs of 58 weeks old,300 1-day-old offspring broilers with similar body weight and health were selected.The offspring broilers were divided into three treatment groups A,B and C according to the form of trace elements added in the diet of broiler breeders.Group A was the control group,group B and group C were the treatment groups,corresponding to group I,II and III of broiler breeders respectively.5 replicates per group,20 chickens per replicate.The experimental period was 6 weeks using the online feeding mode.Two chickens were collected for blood samples at 1-day-old,and the average daily gain and feed intake were recorded every week.After 42 days of continuous feeding,2 chickens per replicate were slaughtered,blood was collected and slaughtered to detect growth performance,meat quality,antioxidant,immune and blood biochemical indexes.The results showed:1)The feed-meat ratio in group C was significantly lower than that in group A and group B(P < 0.05);The death rates in group B and group C were significantly lower than those in group A(P < 0.05).2)The total clearance rates of group B and group C were significantly higher than those of group A(P < 0.05);the abdominal fat rate in group B was significantly lower than that in group A(P < 0.05).3)The 45 min meat redness a * of breast muscle in group B was significantly higher than that in group A and group B(P < 0.05);the shear force of chest muscle in group C was significantly lower than that in group B(P < 0.05).The 24 h meat redness a * of leg muscle in group B and C was significantly higher than that in group A(P < 0.01).4)Compared with group A,the plasma levels of superoxide dismutase,catalase and glutathione peroxidase in group B and group C were significantly increased(P < 0.01),and the content of malondialdehyde was significantly decreased(P < 0.01).The level of copper and zinc superoxide dismutase in group C was significantly higher than that in group A(P < 0.05).5)Compared with group A,the plasma superoxide dismutase,catalase and glutathione superoxide dismutase levels of 42-day-old offspring broilers in group B and group C were significantly increased(P < 0.05),and the malondialdehyde content was extremely significantly decreased(P < 0.01).6)The plasma immunoglobulin A content of 1-day-old broilers in group B and group C was significantly higher than that in group A(P < 0.01).The content of immunoglobulin G in group B was significantly higher than that in group A(P < 0.05).The immunoglobulin M content in group C was significantly higher than that in group A(P < 0.05).7)The plasma immunoglobulin A content of 42-day-old broilers in group B and group C was significantly higher than that in group A(P < 0.01).The immunoglobulin M content in group C was significantly higher than that in group A(P < 0.05).8)The plasma alkaline phosphatase content of 42-day-old broilers in group B was significantly higher than that in group A(P < 0.01).9)The relative economic benefits of offspring broilers in group B and group C were7.1% and 36.85 % higher than those in group A,respectively.In summary,the addition of hydroxymethionine chelated polyminerals in diets may improve the full bore rate and meat color by improving the antioxidant and immune performance of offspring broilers.The feed-meat ratio,abdominal fat rate and chest muscle shear force were reduced,which ensured the health of offspring broilers and improved their economic benefits.Comprehensive indicators and actual production costs.The addition mode of 60 % hydroxymethionine chelated polymetallic ore to replace 100 % inorganic trace elements in broiler diets has the best effect and the maximum economic benefit.