紫茎泽兰水浸提液对慈竹种子萌发及幼苗生长的影响

以浓度为0(对照)、0.25%、1.00%、2.00%、3.00%的紫茎泽兰水浸提液处理慈竹种子,研究其水浸提液对慈竹种子萌发和幼苗生长的化感作用。研究结果表明,紫茎泽兰水浸提液对慈竹种子的萌发和生长都起到显著影响。在低浓度处理下,浸提液具有低剂量刺激效应,可提高慈竹种子的发芽率、发芽势;随着浓度的升高,慈竹种子发芽率、发芽势显著降低,同时,幼苗的鲜重、根冠比先增加后降低;丙二醛含量、SOD酶活性与浸提液的浓度呈正相关;POD酶活性则先上升,后下降,但均高于对照组。这说明较高浓度的紫茎泽兰水浸提液可显著抑制慈竹种子萌发和幼苗的生长,其入侵林地后对竹林的生产和经营存在潜在威胁。

The Effect of Aqueous Extracts of Ageratina adenophora on Seed Germination and Growth of Neosinocalamus affinis

The seeds were treated by 0(ck),0.25%,1.00%,2.00%,3.00% aqueous extract form Ageratina adenophora in order to investigate the allelopathy on seed germination and growth of Neosinocalamus affinis. The results showed that the aqueous extract of A.adenophora had a significant impact on seed germination and growth of N. affinis. At low concentrations, the aqueous extract improved the germination percentage and germination potential;As the concentration increased, the germination percentage and potential decreased significantly;The fresh weight, root-shoot ratio increased and then fell down;The MDA content and SOD activity were positively related to the concentration of aqueous extract;The POD activity also increased and then fell down, but still higher than those in the control group(0.00%). It suggested that the higher concentration of aqueous extracts would ignificantly inhibit the seed germination and growth of N. affinis, there was a potential threat to the production and operation of bamboo forest.