通过对分布于我国的结缕草属( Zoysia Willd.) 54 份种质地下部分特点的研究, 发现其地下茎分布都在 15 cm土层内, 其中大部分在 5 cm 深度的土层范围内( 97.23%) , 很少达到 15 cm( 0.29%) ;不定根一般可分布到 40 cm 左右, 但表层 15 cm 内分布了不定根总量的 81.62 %, 其下的 25cm 土层中分布的不定根只占不定根总量的 18.38% 。地下茎在 10～ 15 cm 、不定根在 30～ 40 cm 土层中各性状的变异都比较显著 。相关分析表明, 随着纬度的升高, 地下茎在较深的土层( 5～ 15 cm) 中分布密度有增加的趋势, 而伴随着纬度升高不定根分布密度趋小。 根据地下茎和不定根分布的特点, 可将我国结缕草属植物地下部分划分为 3 大类型, 即浅茎密根型、中茎密根型和深茎浅根型。
 

Based on traits of rhizome and adventitious root of 54 accessions of Zoysia Willd .in China, this paper revealed that the rhizomes distributed within 15 cm depth soil, 97.23 % of which distributed in 5 cm depth soil and only 0.29 % located below 15 cm depth .Adventitious root distributed within 40 cm depth, but 81.62 % of which distributed in 15 cm depth, and only 18.38% distributed in left soil layers, variability of 10 -15 cm depth rhizome and 30 -40 cm depth adventitious root were obvious .Correlation analysis showed that density of rhizome tended to rise in 5 -15 cm depth and density of adventitious root tended to lower with the latitude increasing .Based on cluster analysis of rhizome and adventitious root characteristics, these accessions could be divided into 3 groups: shallow rhizome dense root ;moderate depth rhizome dense root ;deep rhizome shallow root .