六盘山地区华北落叶松嫩枝扦插试验

Twig Cuttings Experiment on Larix principis-rupprechtii in Liupan Mountain Region

华北落叶松是中国特有树种,在中国华北地区中山以上山地作为主要用材和造林绿化树种。在六盘山林区适合海拔1200~2000m的高山栽植,引种后其表现出耐寒、抗风、耐贫瘠、速生、材质干型好等优良性状。目前华北落叶松大多以种子繁殖为主,而扦插繁育速度快,结实早,且保持母本优良遗传性状。在试验过程中,用不同浓度药剂处理插条后,在不同比例的基质中进行扦插,比较分析几种不同处理对插条生根率、平均根数、平均根长的影响。

Larix principis-rupprechtii is endemic species in China,more than medium altitude mountain in north China as the main material and the afforestation tree species. In Liupan mountain area suitable for1200 ～ 2000 m mountain planting,after introduced show the cold and wind resistance,barren resistance,excellent properties such as fast-growing,material quality well. At present most of Larix principis-rupprechtii is given priority to with seed breeding,and cutting propagation speed,strong early,and keep good maternal genetic traits. In the experiment,the cuttings were treated with different concentrations of chemicals,cutting in different proportions of substrates. The influence of several different treatments on the root rate,average root number and average root length of the cuttings was analyzed.