开花期纳里橐吾水浸液对4种禾本科牧草种子萌发的影响

摘要

[目的]研究新疆纳里橐吾(Ligularia naryensis)蔓延机制以及导致草地退化原因.[方法]采用培养皿滤纸法在人工气候箱中研究纳里橐吾水浸液对牧草种子萌发的影响.[结果]纳里橐吾根和茎叶的水浸液对4种牧草种子萌发和萌发指数具有抑制作用,且根的抑制作用大于茎叶；对萌发指数影响大于萌发率；抑制作用随水浸液浓度的增加而加大；4种牧草对纳里橐吾化感作用敏感性从强到弱依次为无芒雀麦=草地早熟禾＞苇状羊茅＞黑麦草.[结论]在纳里橐吾退化草地恢复时,应优先考虑黑麦草和苇状羊茅等耐受性较好的优良牧草.%[Objective] The purpose of this study was to research the spread mechanism of ligularia naryensis in Xinjiang and the causes of grassland degradation. [Method]Effect of L. Naryensis Aqueous extract on the Seed Germination of pasture plants was studied in a growth chamber in pot culture. [Result]The result showed that the roots and stem - leaf of L. Naryensis inhibited seed germination and germination index of pasture plants. The inhibition of roots was stronger than that of stem - leaf. The influence of germination index was stronger than that of germination rate. Trie inhibiting effect became stronger with the increase of concentration of aqueous extract. The allelopathic sensitivity was in the order of Bromus inermis = Poa pratensis > Festuca arundinacea > Lolium perenne. [Conclusion]When the degenerated grassland of Ligularia naryensis is recovered, the first thing to be considered should be to apply the better tolerant fine grasses such as: Lolium perenne and Festuca arundinacea.