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1 生物学特性 紫花苜蓿植株高大,生长40 d以后,株高60-80 cm,形成的冠丛呈桶状膨大,分枝多,叶片丰富。叶形多为倒卵形或长椭圆形,前端边缘有锯齿,有细小的绒毛,具小而尖的托叶,全株总叶片重占鲜株重的60％左右,叶长28-38mm,叫宽为18-27 mm,每个枝条分节多而且节间短,着生大量叶片。根系发达,根瘤菌分布多,具有较强固氮能力。种子小,多为肾形,外观为黄褐色,略带光泽。千粒重为23-2.8 g。
1 biological characteristics of alfalfa plant tall, 40 d after growth, plant height 60-80 cm, the formation of crown plexus tuber inflated, more branches, leaves rich. Leaves mostly obovate or oblong, with serrated edges, small villi, with small and pointed stipules, the total plant leaves accounted for about 60% of fresh weight, leaf length 28-38mm, called the wide 18-27 mm, each branch sub-section more and internodes short, with a large number of leaves. Developed roots, rhizobia distribution, with strong ability to fix nitrogen. Small seeds, mostly kidney-shaped, the appearance of brown, slightly shiny. Thousand grain weight of 23-2.8 g.