Pasture formation and management are crucial to avoid yield reduction. This experiment aimed to examine the effects of tall fescue-centered mixed-seeding combinations on yield and vegetation changes in perennial pastures in the central region for two years, from September 2020 to October 2022. The treatments were arranged in three replications in a randomized block design: control (C), tall fescue-based mixture-1 (T-1), and tall fescue-based mixture-2 (T-2). The tall fescue (TF), orchard grass (OG), perennial ryegrass (PRG), Kentucky bluegrass (KBG), and white clover (WC) were used. The emergency rate of grasses (70.0 to 73.3%) did not differ among mixed seeding combinations. Overwintering rates (81.7 to 83.3%) were similar among treatments. The plant height of grasses was similar at each harvest date, with the highest height (86.2 cm) recorded in the second harvest of the first year, followed by that (58.4 cm) in the third harvest of the first year; it was least (38.9 cm) in the fourth harvest of the second year. There was no significant difference in the dry matter yield of grasses among the mixed seeding combination treatments in the first, third, or fourth harvests of the first year (p>0.05). For second-year grasses, dry matter yield was not significantly different in harvest date among the treatments (p>0.05). Based on mixed seeding ratio, orchard grass showed the highest yield at 70% in the C treatment, followed by tall fescue at 80% and 60% in the T-1 and T-2 treatments, respectively, in the first harvest after seeding. There was no significant difference in feed value between treatments (p>0.05), but a significant difference was observed between the third and fourth harvest (p<0.05). Therefore, it indicated that it is important to create perennial pastures in the central region through mixed seeding combinations centered on tall fescue.

Ⅰ. INTRODUCTION
Ⅱ. MATERIALS AND METHODS
    1. Experimental design
    2. Investigation parameters
    3. Statistical analysis
Ⅲ. RESULTS AND DISCUSSIONS
    1. Weather conditions and wintering potential
    2. Dry matter yield of pasture
    3. Vegetation changes and feed value of pasture
Ⅳ. CONCLUSIONS
Ⅴ. ACKNOWLEDGEMENT

• Jeong Sung Jung(National Institute of Animal Science, RDA, Cheonan, 31000, Republic of Korea)
• Se Young Lee(\National Institute of Animal Science, RDA, Hamyang, 50000, Republic of Korea)
• Mirae Oh(National Institute of Animal Science, RDA, Cheonan, 31000, Republic of Korea)
• Hyung Soo Park(National Institute of Animal Science, RDA, Cheonan, 31000, Republic of Korea)
• Bae Hun Lee(National Institute of Animal Science, RDA, Cheonan, 31000, Republic of Korea) Corresponding author
• Ki Choon Choi(National Institute of Animal Science, RDA, Cheonan, 31000, Republic of Korea) Corresponding author