根蘖型苜蓿能在水平根上形成根蘖,进而形成枝条的苜蓿。对国内育成的公农3号、图牧3号、图牧4号等苜蓿品种,进行根蘖性状及持久性能的研究。结果表明:根蘖苗在距主根40~80cm处匍匐根分生组织最活跃,单株根蘖苗数达144.2~185.8个,比加拿大Heinrichs、Spreador根蘖型品种(对照)增加19.57%~91.74%,以逐年产草量来衡量,国内育成品种产草量比对照增产16.02%~29.41%,持久性能亦较好。 Root tiller type alfalfa can form root tillers in horizontal roots, and then form alfalfa branches. The domestic cultivated alfalfa cultivars such as Gongnong 3, Tumu 3 and Tumu 4 were studied for their tillering characters and long-term performance. The results showed that the roots of tillering seedlings were the most active in the roots of creeping roots at the depth of 40 ~ 80cm, with the number of root tillers per plant reaching 144.2 ~ 185.8, which increased by 19.57% ~ 91.74 than that of Heinrichs and Spreador roots in Canada %, To measure annual production of grass, the yield of domestic bred varieties increased 16.02% ~ 29.41% compared with the control, lasting performance is also better.