새로운 甘味資源植物 Stevia rebaudiana Bertoni의 栽培開發에 관한 硏究(II) = A Study on the Development of Stevia rebaudiana Bertoni in Jeju-do

다국어 초록 (Multilingual Abstract)

This study was made to know the growth and adaptability, according to the planting density,
wintering, propagation. and photoperiod of Stevia rebaudiana Bertoni M. in Jeju-do.
The result obtained are summarized as follows;
The stalk grew in proportion to the temperature as the growth rate of stalk was progressed
rapidly between the last of July and the last of August.
The denser planted the Stevia, the quantity were increased.
The wintering effect of stevia was the best in the polyethlene film tunnel, the next was
polyethylene film mulching. And ashes mulching was not so effective entirely in soil temper-
ature promotion.
When Stevia was treated with the next plant growth regulators, the rooting rate was ordered
as indole butyric acid, atonic, naphthalene acetic acid, tachigalen, rooton and control. The
number of roots was ordered as indole butyric acid, naphthalene acetic acid, rooton, tachigalen,
atonic and control. And length of roots was ordered as indole butyric acid, naphthalene acetic
acid, rooton, tachigalen, atonic, and control.
According to the different bed-soil, rooting rate was ordered as scoria, subsoil, stream sand,
and seashore sand. The number of roots was ordered as scoria, sea-shore sand, subsoil, stream
sand. And the length of roots was ordered as sea-shore sand, scoria, stream sand, subsoil.
When treated in short day, flowering-bud appearance was reduced for about two weeks, and
flowering for about a week, comparing with the control group.