Bantara Journal of Animal Science p ISSN : 2656-9701 Vol. 2, No. 2, October 2020 e ISSN : 2657-1587 68 Analysis of Tannin and Flavonoid Contents of Green Sirih Leaves (Piper betel linn) of Green Different in Physical Conditions Sigit Setyabudi 1 , Engkus Ainul Yakin 2 , Sri Sukaryani 2 1 Student of Program Study of Animal Science, Faculty of Agriculture, Universitas Veteran Bangun Nusantara Sukoharjo 2 Program Study of Animal Science, Faculty of Agriculture, Universitas Veteran Bangun Nusantara Sukoharjo Abstract The purpose of this study was to determine the levels of tannins and flavonoids from green sirih leaves which have different physical conditions. Sirih leaf is used as the object of treatment prior to use beam sun dried for 2 days until the color changes, the weight of time, as well as the start crumbly texture, then followed by a drying method using an oven with a temperature of 40 o C. The experimental design research in the form of RAL with using observation samples in the form of sirih leaf flour which was dried using sunlight without oven (P0), sirih leaf flour dried in the sun for 6 hours (P1), 7 hours (P2), 8 hours (P3). Sirih leaves that have been made into flour according to the experimental design are then analyzed for the content of tannins and flavonoids. The results of laboratory analysis are then processed using the SPSS application with ANOVA and Duncan analysis. Results of the analysis indicated that there was a very real effect on the old oven for 40 O C to contain tannins and flavonoids (P <0.01), followed different test that produces very real differences occurred between treatments. The results of the use of methods oven for 8 hours at a temperature of 40 o C after drying sunlight can increase the tannin content of 0,6% and 0,09% flavonoids from sun drying method without oven. Keywords : Green sirih leaf, Flavonoids, Tannins. Introduction Feed is an external factor that has a major influence on the productivity of a livestock business, including the chicken farming industry. The feed used in chicken farms generally consists of a mixture of ingredients obtained by considering several conditions such as a large amount of availability, economical, and having sufficient nutritional content for livestock. The use of commercial feed which is produced by a number of factories provides a product that consists of a composition of feed ingredients with a relatively high variation in nutrition and price. Innovation in the use of plant feed ingredients is an alternative in an effort to provide various nutritional content and a form of effort to reduce feed costs. One of the uses of plant feed ingredients that have been developed is sirih leaf, in several studies it has shown that green sirih leaf is processed into a solution which can increase the metabolism of broiler chickens.