| The garlic husks is waste material which is produced during the deep processing of garlic produces,has a considerable impact on the environment and was little utilized.The development of garlic husks extract –β-dextrin feed additive is an effective way to solve the utilization of garlic husks.In this study,the effective components of garlic husks were extracted by distillation combined with water extraction and alcohol precipitation,and then the extracted product of garlic husks was made.The microstructure of the products was compared under different granularity,and the results show that the best particle size of the extracted products of garlic husks is 200 mush.In addition,the antibacterial effect of the extracted product of garlic husks on E.coli,Salmonella and Staphylococcus aureuswas evaluated in vitro,indicating antibacterial effect depending on dose of the products.More 50 % scavenging rate of superoxide anion and hydroxyl radical of the of garlic husks extracted product were measured by Pyrogallol method and Fenton method,respectively.The extracted product of garlic husks can reduce the peroxide value of lard and sesame oil during high temperature storage condition(P<0.05),and the better effect was obtained when it was mixed with VC.On this basis,the product of β-dextrin coated 5%,10%,20% and 30% garlic husks extract was further studied,and results showed that the optimum content of garlic husks extract in product of garlic husks extract-β-dextrin was 20%.The best conditions for making the product of garlic husks extract-β-dextrin were: coating temperature 70-80 ℃,mixing speed 300 r/min,homogeneous temperature 50℃±1℃,homogeneous time 10-15 min.When the particle of size of garlic husks extract-β-dextrin product was less than 80 mush,the microstructure was changed obviously.With the increase level of garlic husks extract-β-dextrin product,the water content,stability in water and gelatinization rate of garlic skin extract-β-dextrin were decreased(P<0.05),while the hardness of the products was increased(P<0.05),and weight per L was not affected(P>0.05).The experiment of broiler feeding showed that compared with the control group,the diet supplementation of 0.05% garlic husks extract-β-dextrin product increased the survival rate by1.04%,average individual body weight by 100 g,and decreased feed to gain ratio by0.05 in broilers,and total net income was increased by 10572.05 yuan in experimental broiler.Taken together,garlic husks extract-β-dextrin product can be used as a novel feed additive for broiler production.The product of garlic husks extract-β-dextrin is consisted of20% garlic husks extract and 80% β-dextrin. |
