省沽油嫩枝扦插生根特性

Rooting Characteristics of Green-wood Cuttings of Staphylea bumalda

以省沽油当年生枝条为材料,研究其嫩枝扦插生根特性。通过对影响嫩枝插穗生根的插穗类型(A)、激素种类(B)、激素处理时间(C)、基质种类(D)及激素种类与处理时间交互作用(B×C)进行系统研究,运用正交试验筛选出嫩枝扦插过程中各处理的优化组合为A2B4C1D2或A4B4C1D2,即选择带叶片的上部或下部插穗,用100 mg/kg NAA处理2 min,以V蛭石∶V珍珠岩=1∶1为基质,进行扦插育苗效果最好,各试验处理最高生根率为96.25%。省沽油嫩枝插穗属于综合性生根类型,且易生根,根系发达,但生根与愈伤组织没有必然联系。

Staphylea bumalda is a rare woody oil tree species, which is also used as an edible and landscape tree in China. The soft branches were used to study rooting ability of greenwood cuttings. The effects of cutting types, kinds and treatment time of hormone, medium kind and the interaction between hormone kind and treatment time on rooting were studied by the orthogonal experiment design. The results showed that the best combination was A2B4C1D2 or A4B4C1 D2. Cuttings were optimal in lower or higher crown with part leaves. They are treated by NAA in concentration of 100 mg/kg for 2 minutes and then cut into compound medium of vermiculite and perlite with a ratio of 1 ： 1 in volume. It was easy to root for green wood cuttings at the maximal rooting rate of 96.25%. However rooting was not inevi tably related to callus as an integrative rooting type.