食叶草蛋白的提取工艺优化及对肉鸡生长性能、屠宰性能和经济效益的影响OA

The experiment aims to study the extraction process of edible dock protein and its effects on broiler growth performance,slaughter performance,and economic benefits.The experiment used edible dock as raw material and optimized the reverse micellar extraction process with[AOC/iso octane]as the system using response surface methodology.At the same time,400 Arbor Acres(AA)commercial white feathered broiler chickens aged 21 d were selected for the experiment and randomly divided into 4 groups,with 10 replicates in each group and 10 broiler chickens in each replicate.The control group(group A)was fed a basal diet,while the other three groups were supplemented with edible dock protein at 1 000(group B),2 000 mg/kg(group C),and 4 000 mg/kg(group D),respectively.The pre-trial period lasted 7 days,followed by a 21-day formal trial.Results showed that:① the optimal extraction conditions for edible dock pro-tein were:KCl concentration 1.6 mol/L,pH 7.2,extraction temperature 39℃,under these conditions,the extraction rate of edible dock protein was 63.34%.② Compared with the control group,the final body weight was significantly increased in groups C and D(P<0.05),while the increase in group B was not significant;the average daily gain(ADG)was significantly improved in groups C and D(P<0.05),while the increase in group B was not significant;F/G was signifi-cantly reduced in groups C and D(P<0.05),while the decrease in group B was not significant.③ Compared with the control group,groups C and D exhibited significantly improved slaughter rate,semi-eviscerated yield,eviscerated yield,breast muscle rate,and thigh muscle rate(P<0.05),while the improvement in group B was not significant.④ According to the market price of feed,the sales price of broiler chickens,and the price of edible dock protein,calculated by the economic benefit formula,compared with the control group,the breeding profits of broiler chickens in groups B,C,and D increased by 9.79%,16.49%and 15.46%,respectively.The above results indicate that edible dock protein can improve the growth performance,slaughter performance,and economic benefits of broiler chickens.