山蒌及其他海南胡椒属野生植物扦插生根技术研究

山蒌(Piper sarmentosum Roxb.)是极具开发利用价值的海南胡椒属野生植物。利用不同浓度(100、400和800 mg/L)的根旺、IAA、IBA和NAA 4种不同的生长调节剂在对山蒌插条基部浸泡处理不同时间（0.5 h、2 h和4 h），以研究其扦插生根技术。结果表明，不论从生根率、平均根数还是最长根长等指标来看，所有处理均取得较对照好的结果。根据生根率高低，以IBA在100 mg/L处理5 h的生根率最高，达到80.00%；该处理获得的平均根数为5.67，最长根达到10.6 cm。利用同样的方法对其他9个海南胡椒属野生种进行生根实验也取得良好的生根结果。

Rooting Study of Cuttings of Piper sarmentosum and Other Wild Piper Plants in Hainan

Piper sarmentosum Roxb is a wild Piper plant with great value of development and utilization in Hainan. Different concentrations (100, 400 and 800 mg/L) of 4 different growth regulators (Genwang, IAA, IBA and NAA) were used to study the rooting technology of cuttings of P. sarmentosum with the base of the cuttings soaked for different time (0.5 h, 2 h and 4 h). The results showed that, with respect to rooting rate, average number of roots, and length of the longest root, all treatments obtained better results than those of the control. The best was the treatment with 100 mg/L IBA for 5 h, with the rooting rate of 80.00%, the average number of roots 5.67 and the length of the longest root 10.6 cm. The other nine species of Piper in Hainan rooted well using the same method.