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Background : Cynanchum wilfordii is a perennial species of climbing vine belonging to the family Asclepiadaceae. Cynanchum wilfordii native to Korea has been cultivated and used for medicine with tuber root. Prevalent furrow size is 20 ㎝ in height for Cynanchum wilfordii cultivation in Korea. This experiment was carried out to find out yield and commercial characteristics according to furrow height in cultivation of Cynanchum wilfordii.
Methods and Results : There were 4 furrow height of 10 ㎝, 20 ㎝, 30 ㎝, and 40 ㎝. Seedling transplanting was performed in early May with 40-day seedlings grown in pot from late March. Seedling establishment rates were similar as 96.7% - 99.7% in all treatments. Vine length, branch number, node number, stem diameter, leaf length, and leaf width were higher in furrow of 40 ㎝ and chlorophyll content was not significantly different according to furrow height. Main root number was more as 5.2 ea/plant in 20 ㎝ furrow and first lateral root number was more as 4.5 ea/plant but not significantly different in 20 ㎝ and 30 ㎝ furrow. Main root length was longer as 39.2 ㎝ and 37.0 ㎝ in 40 ㎝ and 30 ㎝ furrow height respectively. First lateral root length was longest as 25.0 ㎝ in 30 ㎝ furrow. Main root diameter was thicker as 24.9 ㎜ in 40cm furrow and thinner as 18.7 ㎜ in 10 ㎝ furrow. First lateral root diameter was thicker as 14.4 ㎜ in 20 ㎝ furrow and thinner as 11.2 ㎜ in 10 ㎝ furrow. Total yield and commercial yield in 40 ㎝ furrow were highest as 1,173 ㎏/10 a and 919 ㎏/10 a, 78.6% of total yield.
Conclusion : It was considered that higher total yield and commercial yield in 40 ㎝ furrow was resulted from better aerial part growth including vine length, branch number, node number, stem diameter, leaf length, and leaf width and bigger main tuber root size.
