落叶松水提物对胡桃楸化感作用的生物测定

Bioassay of Allelopathical Activity of Larch (Larix gmelini) Aqueous Extracts against Juglans mandshurica

于2004年进行了落叶松水提物对胡桃楸化感作用的生物测定。试验结果表明,与对照相比,0.0125g·mL-1的落叶松根、皮、枝水提物对胡桃楸种子发芽率、发芽指数表现出显著的促进作用(p<0.05),低质量浓度(0.0125、0.025g·mL-1)的落叶松根、皮、枝水提物明显促进萝卜、白菜萌发和幼苗生长。落叶松叶水提物对胡桃楸种子萌发以及萝卜、白菜萌发和幼苗生长的促进作用却表现为随着水提物质量浓度的降低,促进作用逐渐下降的趋势,施加落叶松水提物对胡桃楸种子萌发所起的促进作用可能与树种间的化学相互作用有关。

A bioassay test of allelopathy in larch aqueous extracts against walnut, Chinese cabbage and radish was conducted in 2004. Result showed that water extract with the concentration of 0.012 5 g · mL^-1 from root, bark and branch of larch could significantly accelerate the germination rate and germination index of walnut seeds （p 〈0.05 ）. Aqueous extract with low concentrations （0. 012 5 and 0.025 g · mL^-1 ） could obviously promote the germination and seedling growth of Chinese cabbage and radish. Aqueous extracts with high concentrations from larch leaves could significantly hasten the germination of walnut seeds. However, the promotion of leaf water extract on the germination of walnut seeds gradually declined with concentration of leaf aqueous extracts decreasing. The acceleration of larch aqueous extracts on walnut germination might be related to the allelopathy in the two species.