紫茎泽兰叶水提液对七种乡土植物幼苗生长和叶绿素的化感影响

摘要

该文以紫茎泽兰(Ageratina adenophora)为供体,以7种乡土植物即马尾松(Pinus massoniana)、杉木(Cunninghamia lanceolata)、构树(Broussonetia papyifera)、板栗(Castanea mollissima)、花椒(Zanthoxylum bungeanu)、油茶(Camellia oleifera)、火棘(Pyracantha fortuneana)为受体,研究了紫茎泽兰叶的水提液对受试植物幼苗叶绿素含量和生长的化感影响.结果表明:(1)紫茎泽兰叶水提液在低浓度条件下对花椒、火棘的叶绿素a、叶绿素b和叶绿素总含量具有一定的促进作用,对其余5个物种的叶绿素影响不显著.在高浓度处理下杉木、板栗和构树叶绿素a、叶绿素b和叶绿素总含量表现显著下降.火棘仅叶绿素b显著下降,马尾松均表现为增加,对油茶和花椒影响不显著.(2)对受体植物生长参数测定后发现,紫茎泽兰叶片水提液在高浓度条件下对除板栗外的6种受体植物的所有生长参数均表现出显著的抑制作用,在低浓度下对火棘、花椒、杉木的地径和冠幅具有一定促进作用,对其余4个物种生长参数影响不显著.%Ageratina adenophora was used as the donor, and seven kinds of native plants were used as the receptor, they were Pinus massoniana, Cunninghamia lanceolate, Broussonetia papyifera, Castanea mollissima, Zanthoxylum bungeanu, Camellia oleifera, Pyracantha fortuneana, respectively.We studied the allelopathic effects of Ageratina adenophora aqueous extract solution on chlorophyll content and growth of seedlings of tested plants.The results are as follows: (1) A.adenophora aqueous aqueous extract solution at low concentration can improve the chlorophyll a, chlorophyll b and total chlorophyll contents of Zanthoxylum bungeanu and Pyracantha fortuneana, but the effects on chlorophyll of the other five species was not significant.Ageratina adenophora aqueous extract solution at high concentration reduced the chlorophyll a, chlorophyll b and total chlorophyll contents of Cunninghamia lanceolate, Castanea mollissima, Broussonetia papyifera significantly.The chlorophyll b of Pyracantha fortuneana decreased significantly, while the chlorophyll b of Pinus massoniana increased on the contrary, there was no significant influence on Castanea mollissima and Zanthoxylum bungeanu. (2) We measured the receptor plant growth parameters and found that, Ageratina adenophora aqueous extract solution at high concentration had significant inhibitory effects on all growth parameters of the six receiver plants except for Castanea mollissima.Ageratina adenophora aqueous extract solution at low concentration could improve the ground diameters and crown widths of Pyracantha fortuneana, Zanthoxylum bungeanu and Cunninghamia lanceolata, but had no significant effects on growth parameters of the other four species.