Allelopathic Effects of Pedicularis kansuensis Maxim. on Several Graminaceous Grass Species on Alpine Meadow
Allelopathic Effects of Pedicularis kansuensis Maxim. on Several Graminaceous Grass Species on Alpine Meadow
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发表时间：
2011
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通讯作者：
W. Hongsheng
中科院分区：
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作者：
W. Hongsheng
甘肃马先蒿地上部分水提物，以青藏高原退化高寒草甸上的优势毒草甘肃马先蒿（Pedicularis kansuensis Maxim.）为材料，研究了甘肃马先蒿（Pedicularis kansuensis Maxim.）地上部分水提液对4种高原禾本科牧草种子萌发和幼苗生长的抑制作用，结果表明，甘肃马先蒿地上部分水提液对4种供试牧草种子萌发和幼苗生长均有明显的抑制作用其种子萌发的化感作用敏感性大小依次为：中华羊茅青海1号、黄羊茅青海短芒羊茅、幼苗生长量大小顺序为青海1号短芒羊茅（E.breviaristataKengF.cv.Qinghai No.）化感作用的敏感性大小顺序为中华羊茅、垂穗羊茅、青海1号、青海短芒牛鞭草，甘肃马先蒿的化感作用是导致退化高寒草甸有毒杂草蔓延的原因之一。
The aqueous extracts from the above ground parts of Pedicularis kansuensis Maxim.,a dominant plant of poisonous weed on degraded alpine meadow in Qinghai-Tibet plateau,were used to study their inhibitory effects on the seed germination and seedling growth of four graminaceous grass species on the plateau.The results indicated that the aqueous extract from the above ground part of Pedicularis kansuensis Maxim.had significant inhibitory effects on the seed germination and seedling growth of tested grass species(P0.05),the inhibitory effects gradually intensified with the aqueous extract's concentration increasing.Allelopathic sensitivity of their seed germination was in the order of Festuca sinensisElymus sibiricus L.cv.Qinghai No.1Elymus nutansElymus breviaristatus Keng F.cv.Qinghai,while their seedling growth was in the order of Festuca sinensis Elymus nutans Elymus sibiricus L.cv.Qinghai No.1 Elymus breviaristatus Keng F.cv.Qinghai.Overall the allelopathic sensitivity was in the order of Festuca sinensis Elymus nutans Elymus sibiricus L.cv.Qinghai No.1 Elymus breviaristatus Keng F.cv.Qinghai.The allelopathy of Pedicularis kansuensis Maxim.was one of the factors that caused the spreading-out of poisonous weeds on the degraded alpine meadow.