为研究金丝皇菊枝条扦插生根基质中添加生长激素IBA和NAA促进生根的最佳复配浓度和浸泡时间。设置IBA 0、200、400、600 mg/L，NAA 0、100、200、300 mg/L，浸泡时间0.5、1.0、1.5、2.0 h的L16(43)三因素四水平正交试验。结果表明IBA和NAA单用时，金丝皇菊枝条扦插的平均根系效果指数分别为2.28和1.53。IBA 200 mg/L和NAA 200 mg/L复配液浸泡金丝皇菊枝条2.0 h，其根系效果指数为3.90，生根效果最好；IBA 600 mg/L、NAA300 mg/L复配液浸泡金丝皇菊0.5 h，对生根有一定的抑制作用，其他处理较清水浸泡0.5 h对生根均有一定的促进作用。IBA 200 mg/L和NAA 200 mg/L复配，浸泡2 h，为最佳复配浓度和浸泡时间，过大的复配浓度对生根有抑制作用。

To study the best compound concentration and soaking time of IBA and NAA growth hormones on the rooting effect of of golden silk chrysanthemum cuttings, through athree factor four level orthogonal test L16 (43), IBA was set at 0, 200, 400 and 600 mg/L, NAA was set at 0, 100, 200 and 300 mg/L, and the soaking time was set at 0.5, 1, 1.5 and 2 h. It was found that when IBA and NAA were used alone, and the average root effect indexes of golden silk chrysanthemum cuttings were 2.28 and 1.53, respectively. Soaking the golden silk chrysanthemum cuttings with IBA 200 mg/L and NAA 200 mg/L compound solution for 2 h showed the the root effect index of 3.90 which was considered as the best for rooting. Soaking golden silk chrysanthemum cuttings in IBA 600 mg/L and NAA 300 mg/L compound solution for 0.5 h showed a certain inhibitory effect on rooting, while all other treatments have a certain promoting effect on rooting compared with the control, soaking in water for 0.5 h. IBA 200 mg/L and NAA 200 mg/L compound solution soaked for 2 h was the best compound concentrations and soaking time. Excessive compound concentrations could inhibit rooting.

S682.11

2020年天水市成纪之星人才项目“金丝皇菊育苗与无公害栽培技术研究”资助。