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为恢复青藏铁路取土场植被,试验研究垂穗披碱草在青藏铁路取土场植被恢复中的应用。试验结果表明,垂穗披碱草具有较好的抗寒冷、抗干旱及耐盐碱等特性,在取土场的自然出苗率可达60%,越冬成活率和第2年植物群落盖度均达50%以上,群落地上生物量和地下生物量也分别达到(195.74±41.78)g.m-2,(438.56±160.33)g.m-2。在种子萌发和植物越冬、植物个体生长发育以及人工植物群落特征等方面,垂穗披碱草在青藏铁路取土场表现出较好的适应性。采用高原乡土植物垂穗披碱草以及相应的植被恢复技术措施,实现青藏铁路取土场次生裸地植被的快速恢复是可行而有效的。
In order to restore the vegetation of the borrow soil in the Qinghai-Tibet Railway, the application of Elymus nutans to vegetation restoration in the borrow pit of Qinghai-Tibet Railway was studied. The results showed that Elymus natans had better cold resistance, drought resistance and saline-alkali resistance. The natural germination rate reached 60% in the borrow field, the survival rate in winter and the second-year plant community coverage The above-ground biomass and underground biomass also reached (195.74 ± 41.78) gm-2 and (438.56 ± 160.33) gm-2, respectively. Elymus elaphus showed good adaptability in the borrow pit of Qinghai-Tibet Railway in terms of seed germination and overwintering plants, plant individual growth and development and plant community characteristics. It is feasible and effective to realize the rapid restoration of secondary bare vegetation in the borrow pit of Qinghai-Tibet Railway by adopting highlands native plants Elyseriaceae and corresponding vegetation restoration techniques.