Germination and Growth of Codonopsis lanceolata and Astragalus membranaceus as Affected by Different Media Types during Seedling Period
2018
Jeong, H.Y., Graduate School of Gyeongsang National University, Jinju, Republic of Korea | Kim, H.M., Graduate School of Gyeongsang National University, Jinju, Republic of Korea | Kim, H.M., Graduate School of Gyeongsang National University, Jinju, Republic of Korea | Lee, H.R., Gyeongsang National University, Jinju, Republic of Korea | Hwang, S.J., Graduate School of Gyeongsang National University, Jinju, Republic of Korea
This study was conducted to examine the germination and growth during seedling period of Codonopsis lanceolata and Astragalus membranaceus as affected by different media. The seeds were sown in commercial medium (Tosilee), coir, rockwool, and urethane sponge. The seeds were germinated for 22 days in a closed-type plant production system, and seedlings were grown for 35 days after sowing in the venlo-type glasshouse located on Gyeongsang National University. Nutrient solution was supplied by the sub-irrigation as EC 1.0dSㆍm-¹ and pH 6.5 every second day. Final germination of Codonopsis lanceolata was the significantly highest in the coir and rockwool media as 68.5% and 67.9%, respectively. Mean daily germination was also the highest in the coir and rockwool media as 4.2 and 4.1, respectively. The germination rate of Astragalus membranaceus was not significantly difference in the media types. Plant height and leaf area of Codonopsis lanceolata were the significantly highest in the rockwool medium as 11.5 cm and 11.3 cm² , respectively. Longest root length and fresh weight of root were the greatest in the coir medium as 5.8 cm and 0.07 g, respectively. Plant height and leaf area of Astragalus membranaceus were the significantly highest in the coir medium as 14.0 cm and 16.9 cm² , respectively, and fresh and dry weights of root were the highest in the urethane sponge medium as 0.34 g and 0.03 g, respectively. Therefore, these result suggest that the rockwool and coir media were suitable for the germination and growth during seedling period of Codonopsis lanceolata and Astraglus membranaceus.
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