南方红豆杉扦插成活研究

［目的］ 筛选适应南方红豆杉扦插的最佳基质。［方法］ 选用南方红豆杉优良母树50%以下的部位，剪取1年生或当年生半木质化枝条，剪成8～10 cm长的插穗。设清水沙、黄心土、紫石与清水沙混合（1∶1）、珍珠岩粉与清水沙混合（1∶1）4种基质，进行不同基质扦插繁育对比试验。［结果］4种基质中，从生根成活来看，以清水沙为基质的扦插成活率最高，达82.33%，其次是紫石与清水沙混合和珍珠岩粉与清水沙混合，扦插成活率分别为59.33%和42.67%，黄心土的扦插成活率最低（36.67%）；从成本核算来看，以黄心土的扦插成本最低，其次是清水沙，而另2种混合基质的成本是清水沙的2倍。［结论］清水沙有利于南方红豆杉插穗的生根。综合考虑认为，南方红豆杉的扦插以清水沙为最佳基质。

Effects of Cutting with Different Matrixes on the Survival Rate of Taxus chinensis

[Objective] The study aimed to screen the optimum matrix that was suitable for cutting of Taxus chinensis.[Method] With above 50% part of good female tress of T.chinensis as the tested material,its semi-lignified branches of 1-year or the same year were taken to be sheared into the cuttings at the length of 8-10 cm.4 kinds of matrixes of clearwater sand,yellow soil,blend of purple stone and clearwater sand(1∶1)and the blend of perlite powder and clearwater sand(1∶1)were set up to conduct the comparative test on cutting propagation with different matrixes.[Result] Among 4 kinds of matrixes,as for rooting survival,the cutting survival rate was highest with clearwater sand as the matrix,being 82.33%,that with blend of perlite stone and clearwater sand and the blend of perlite powder and clearwater sand were followed,with the cutting survival rate being 59.33% and 42.67% resp.and that with yellow soil was lowest(36.67%).As for cost accounting,the cutting cost with yellow soil was lowest,that with the clearwater sand was next and that with other two blend matrixes were 2 times of clearwater sand.[Conclusion] The clearwater sand favored the rooting of T.chinensis cuttings,so it was suggested through considering comprehensively that the clearwater sand was the optimum matrix for cutting of T.chinensis.