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豆科牧草沙打旺先后在陕北的安塞、吴旗、延安等地大面积推广,适应性很强,能抗寒、耐旱、耐瘠薄,产草量高,根系发达,保持水土和改良土壤的效果显著,受到普遍欢迎。我们从1974年起对它的开花习性进行了观察。1、花序的形成。武功地区7月底8月初的日平均气温28℃左右,沙打旺株高70厘米左右时,叶腋间开始出现花序。花序多分布在一级分枝顶端和二、三级分枝上,二级分枝上能开花结实的花序1—4个,最多8个;能开花结实两个以上的花序,多是早期形成的近基部的二级分枝;三级分枝能开花结实的花序2—3个,多则5个。花序的形成和发育与气温有
Leguminous pasture grass Astragalus in Anshan, Wuqi, Yan’an and other places in northern Shaanxi large-scale promotion, adaptability, can be cold, drought, barren, high yield, root system developed to maintain soil and water The effect of soil improvement is significant and is generally welcomed. We have observed its flowering habits since 1974. 1, the formation of inflorescences. At the end of July and early August, the martial arts area has an average daily temperature of about 28 ℃. When the plant height is about 70 cm, leaf axils begin to appear inflorescences. Inflorescences are distributed in the top of the first level branches and the second and third level branches, the second level branches can flowering fruiting inflorescences 1-4, up to 8; flowering and fruiting more than two inflorescences, mostly early formation Near the base of the second-level branches; three branches can flowering fruiting inflorescence 2-3, as many as five. Inflorescence formation and development with temperature