以中苎1号、湘苎3号、多倍体1号和新品系R057苎麻品种(系)为材料,研究了插条粗细对苎麻低位分枝扦插苗的成苗率、单株根干重、主茎高度增加量及分枝持性的影响.结果表明:4个苎麻品种(系)低位分枝扦插苗的成苗率、主茎高度增加量和单株根干重都表现为扦插粗细0.6 cm>0.8 cm>0.4 cm,且不同插条粗细处理问差异显著;分枝数、最低和最高分枝位长也表现出相同的趋势.综合考虑,在进行苎麻低位分枝扦插苗培育时.扦插苗的粗细以0.6 cm较为理想.虽然不同品种在各个性状上表现各不相同,但从成苗率、单侏分枝数和最低分枝位这3个最关键的性状上看,新品系R057表现最好,多倍体1号次之.%With four ramie varieties in Hunan of Zhongzhu No 1,Xiangzhu No 3, Tris-1 and the new strain R057 as materials, it was studied that the effects of different cutting diameters to the seedling survival rate, stem height increment,root dry weight per plant and branching characteristics of cutting plant to the low branches in ramie. The results showed that seedling survival rate, stem height increment and root dry weight per plant in four varieties of cutting plant to low branches of ramie followed down by cutting diameter 0. 6 cm ＞ 0. 8 cm ＞ 0. 4 cm treatments with significant differencesamong the treatments. The branch number,the length of the minimum and maximum branches showed the same resultes. So the optimum treatment of cutting diameter would be about 0. 6 cm. The different varieties had the different expression, but the variety of R057 was the best one, following by the variety Tris-1 on three key characters of seedling survival rate, branch numbers per plant and lowest-branch location.
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