경남지방에서 도라지 재배지역별 토양이화학적 특성과 사포닌 함량

Abstract

This study was carried out in order to survey the soil physico-chemical, morphology and content of saponinsof 5 year-old Platycodon grandiflorum radix from different areas in Gyeongnam. Soil physical properties was showed 1.01-1.29 of bulk density of soil and soil hardness was increased with increasing soil depth, especially below the 30㎝, however itwas maintained or small increased below the 40㎝. T-N and OM contents of top soil were highest at Geochang as 0.27% and56.9 g/kg, respectively, compared to other areas. The root length was longer at Kimhea and Geochang as 33.8 and 33.7㎝,respectively, and fresh weight was heavy at Geochang as 208.5 g. The contents of saponin of P. grandiflorum radix washigher in fine root compare to main root. By region, content of saponins of P. grandiflorum radix were higher at Hapcheonthan other area. Mg content was highly negatively correlated at p < 0.01 with platycodin D3, deapioplatycodin D, platycodinD, and deapioplatycodin D (-0.499**, -0.433**, -0.421**, -0.511** respectively). These results suggest that no-fertilizedMg effected on the improvement of saponin contents in P. grandiflorum.