火炬树水浸液对苏丹草和狗尾草的化感作用

Allelopathy of Rhus typhina Aqueous Extract on Sorghum sudanense and Setaria viridis

分析火炬树不同器官水浸液对其他植物的化感效应有助于了解火炬树化感作用物质合成的部位。利用火炬树果穗、树皮和根不同浓度的水浸液对苏丹草和狗尾草2种植物的种子进行处理,结果表明:火炬树果穗水浸液对苏丹草和狗尾草的发芽率、发芽指数和化感效应指数均表现为抑制作用,对狗尾草的抑制作用强于苏丹草;火炬树树皮水浸液在0.002 g/mL时对苏丹草有促进作用,其余浓度均表现为抑制作用,树皮水浸液3个浓度对狗尾草均表现为抑制作用;火炬树根水浸液3个浓度对苏丹草都表现为促进作用,在0.002 g/mL时对狗尾草表现为促进作用,其余浓度表现为抑制作用;火炬树化感效应表现抑制作用的强度是果穗>树皮>根。

Analyzing the allelopathy of aqueous extract of different organs of R.typhina on other plants is helpful to know about which organ can produce allelopathic compound.The aqueous of R.typhina fruits,barks and roots were used to treat the seeds of Sorghum sudanense and Setaria viridis.The results showed that the germination rate,germination index and response index of R.typhina aqueous on S.sudanense and S.viridis.The allelopathic effect indexes were both negative,and the negative effect on S.sudanense was stronger than that of S.viridis.Aqueous of barks of T.typhina was a positive effect on S.sudanense at 0.002 g/mL,and the other concentrations were negative.The three concentrations of bark showed negative effects on S.viridis.The three concentrations of roots showed positive effects on S.sudanense.At 0.002 g/mL,it showed positive effects on S.viridis,the rest of the concentration showed negative;the intensity of the allelopathic effect of R.typhina showed negative was fruits>barks>roots.