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本文对引进的九个根蘖型苜蓿品种的生育期、形态特征、根系特点作了观测。其根系可分为主根型、侧根型、水平根型和根蘖型四大类。根蘖的显著特点是有水平侧根,根上有根蘖膨大部,其中有芽或幼枝形成。Spreador、Rangelander、Roamer、Rambler、Drylander、Kane六品种根蘖明显,根蘖株率在20～40％之间;一般每株有水平根14～24条,集中分布在7～20厘米土层内,根蘖节分布在各级水平根上或根的交叉处。植株扩展面积最大的是Rambler苜蓿。生长第三年孕蕾期的冠幅最大可达3.4m~2,为普通苜蓿的2～6倍。根蘖的表现与土壤类型等因素有关。
In this paper, the growth, morphological characteristics and root system characteristics of nine root tillering alfalfa cultivars introduced were observed. Its roots can be divided into the main root type, lateral root type, horizontal root type and root tiller type four categories. Root tiller is characterized by a horizontal lateral roots, roots with enlarged stems, including buds or shoots formed. Spreador, Rangelander, Roamer, Rambler, Drylander, Kane six varieties of obvious root tillering, root tillering rate of 20 to 40%; generally horizontal root 14 to 24, concentrated in the soil layer 7 to 20 cm , Root tillers distributed at all levels of roots or root level at the intersection. The largest plant expansion area is Rambler alfalfa. In the third year of growth, the maximum crown length of buds reached 3.4m ~ 2, which was 2 ~ 6 times of that of common alfalfa. Root tiller performance and soil type and other factors.