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1982年,我园由外地引进少量的种子进行扦插繁殖和播种育苗试验,取得初步结果,简介如下:一、生物学特性通过一年栽培试验,甜菊平均株高为89厘米,最高可达118厘米,茎粗1.2厘米,当年苗多数为单一主茎,茎基部为半木质化,茎节数17～22个,各叶腋中生有芽,芽生长后形成分枝,第一分枝8～15个;第二分枝16～37个,叶对生,倒卵形至宽披针形,上部叶有互生现象,叶长4～11厘米,宽1.8～4.0厘米,叶缘上部有钝锯齿,呈匙形或披针形先端钝,茎部楔形或渐窄,三出叶脉明显。甜菊无明显主根,分布浅,根长8.5～2.5厘米,根数87～104条。花为4～5朵筒状小花组成的头状花序,排列在叶腋和枝端抽出的花枝上成伞房状,筒状小花先端5裂,白色,基部呈紫红色或白色,柱头二裂,花药在柱头下方,单株小花数较多,可为良好蜜源。果实为瘦果,呈纺
In 1982, I park from the introduction of a small amount of seeds for cutting propagation and sowing nursery trials, and achieved preliminary results are as follows: First, the biological characteristics Through one year cultivation test, the average height of stevia plants 89 cm, up to 118 cm , Stem diameter 1.2 cm, when the majority of seedlings for a single main stem, stem base is semi-lignification, stem segments 17 to 22, each leaf axillary buds, buds grow after the formation of branches, the first branch of 8 to 15 The second branch 16 ~ 37, leaves opposite, obovate to broadly lanceolate, the upper leaves have an alternate phenomenon, leaf length 4 to 11 cm, width 1.8 to 4.0 cm, the upper edge of the leaf has a crenellated serrated, spoon Shaped or lanceolate apex obtuse, stem wedge or narrowing, three veins obvious. Stevia no obvious main root, shallow distribution, root length 8.5 ~ 2.5 cm, the number of 87 to 104. Flowers for the 4 to 5 flower heads composed of tubular flowers, arranged in the leaf axils and branches out of the flowering branches into a corymbal, tubular florets apex 5 cracked, white, base was purple or white, stigma two-parted, anthers Below the stigma, a small number of flowers per plant can be a good source of honey. The fruit is achenes, was spinning