四棱豆营养器官化感潜力的比较

Comparisons on Allelopathic Potentials of Vegetative Organs of Psophocarpus tetragonolobus

以萝卜和菜心种子为受体,采用生物检测方法,对四棱豆根、茎和叶水浸液的化感潜力进行比较研究,结果表明:四棱豆根、茎和叶水浸液对萝卜和菜心种子萌发的抑制作用随水浸液处理浓度的增加呈增强趋势.根和茎水浸液对萝卜和菜心的根长均有抑制作用,且根的抑制效果高于茎,而叶表现为促进作用.水浸液对萝卜和菜心胚轴生长均有不同程度的促进作用.四棱豆叶水浸液对提高萝卜根冠比的效果明显,而茎和根水浸液对其影响较小.经四棱豆根、茎和叶水浸液处理后,均能明显降低菜心的根冠比,其中根水浸液的作用效果更为明显.

In order to compare allelopathic potentials of aqueous extracts between roots,stems and leaves of P.tetragonolobus,the biological detection method had been conducted on seed germination and seeding growth of Raphanus sativus and Brassica parachinensis.With rising disposal concentrations of aqueous extracts from roots,stems and leaves of P.tetragonolobus,there were increasing trends forinhibitions on seed germination ratio of R.sativus and B.parachinensis.The aqueous extracts from roots and stems of P.tetragonolobus inhibited radi-cle growth of R.sativus and B.parachinensis,and the inhibiting effects of aqueous extracts from roots was higher than from stems.The aqueous extracts from leaves exhibited stimulations.There were different extent stimula-tions foraqueous extracts from roots,stems and leaves of P.tetragonolobus on hypocotyl growth of R.sativus and B.parachinensis.The treatment effects of aqueous extracts from leaves of P.tetragonolobus were distinct on root mass/crown mass ratio of R.sativus,but that from roots and stems were no evidence.The treatment of aqueous extracts from roots,stems and leaves of P.tetragonolobus reduced root mass/crown mass ratio of B.parachinensis obviously,and that from roots were more visibility.