大葱根系浸提液对樱桃萝卜化感作用的影响研究

目的]为了解决内蒙古中部地区春季大葱收获后种植樱桃萝卜的问题,初步探讨了大葱根系浸提液对樱桃萝卜种子发芽及幼苗生长的化感作用。方法]将大葱根系浸提液稀释为5、10、20、30 mg/ml 4个浓度,分别处理樱桃萝卜种子,进行恒温发芽试验,测定发芽势、发芽率、活力指数、胚根长、苗高、根冠比等指标,最后计算化感作用的综合效应指数。结果]5～30 mg/ml大葱根系浸提液对樱桃萝卜种子发芽势、发芽率、发芽指数、活力指数和幼苗胚根长均有显著的抑制作用,仅对幼苗的苗高产生显著促进作用;综合化感效应为化感抑制作用,且随着浸提液浓度的升高,对樱桃萝卜的化感效应强度增加。结论]不同浓度大葱根系浸提液对樱桃萝卜的发芽和幼苗生长有抑制作用,且随着处理浓度升高,化感作用加强。

Study on Allelopathy of Root＇s Liquid Extract of Allium fistulosum L.on Raphanus sativus L.var.radculus pers

Objective] In order to solve the planting Raphanus sativus L.var.radculus pers problems after Alliumfistulosum L.harvesting in central region of Inner Mongolia,the allelopathic effects on R.sativus L.var.radculus pers.seed germination and seedling growth with root＇ s liquid extract of A.fistulosum L.were studied.Method] The root＇s liquid extract of A.fistulosum L.,which was diluted to 5,10,20,30 mg/ml,treated the seeds of R.sativus L.var.radculus pers with measuring the germination potential,germination rate,vigor index,seedling root length,shoot length,root to shoot ratio and other indicators.Finally,the combined effect of allelopathic index was calculated.Result] The results showed that 5-30 mg/ml A.fistulosum L.root＇ s extract were significantly inhibited on R.sativus L.var.radculus pers seed germination indicators and seedling root length.Only seedling height was significant promoted in the experiment.Comprehensive allelopathic effects were inhibition,and allelopathic effect increased with the concentration increasing.Conclusion] To sum up,A.fistulosum L.root＇ s extract were significantly inhibited on R.sativus L.var.radculus pers seed germination indicators and seedling growth.And allelopathic effect increased with the concentration of R.sativus L.var.radculus pers increasing.