东祁连山高寒区混作禾草地植物群落特征及多样性
刘皓栋 , 郑彦丽 , 田启会 , 贾万臣 , 刘根新 , 曹文侠
甘肃农业大学学报 ›› 2024, Vol. 59 ›› Issue (06) : 218 -226.
东祁连山高寒区混作禾草地植物群落特征及多样性
Plant community characteristics and diversity of perennial mixed grasslands in alpine areas of the eastern Qilian Mountains
目的 解决高寒地区人工混播草地快速退化的现状,增强混作禾草地的稳定性。 方法 以东祁连山高寒10龄混作禾草地为研究对象。通过测定其植被特征的变化,包括物种组成及多样性指数,结合灰色关联度评价挑选出最优混播方式。 结果 4种禾草混播草地的株高、总生物量高于3种禾草和5种禾草混播草地;5种禾草混播草地中杂草总生物量最高。 结论 灰色关联度分析得到无芒雀麦+青海冷地早熟禾+川草2号老芒麦3种禾草混播草地综合性状最佳。青海中华羊茅+本地垂穗披碱草+青海冷地早熟禾+青牧1号老芒麦+无芒雀麦5种禾草混播草地Margalef丰富度指数、Simpson多样性指数和Pielou均匀度指数在所有混播处理中均表现为最高,可作为恢复祁连山东段高寒区退化草地群落多样性的建植方式。
Objective To address the current situation of rapid degradation of artificial mixed grasslands in alpine areas and to increase their stability. Method We studied eight-year-old mixed grasslands in the East Qilian Mountains.Vegetation characteristics of the different treatments,including species composition and diversity indices,were measured and combined with grey correlation evaluation to select the optimal mixed seeding method. Result Plant height and total biomass of the four grass species were generally higher than those of the three grass species and the five grass species,and the total biomass of weeds was the highest among the five grass species. Conclusion The grey correlation analysis showed the best combined performance of the three species of grasses Bromus inermis Leyss.+ Poa crymophila var.Qinghai +Elymus sibiricus L.Chuancao No.2.Simpson diversity index,Margalef richness index and Pielou evenness index of the five species were the highest of all the mixed grasses.Therefore,the mixed grassland treatments of Bromus inermis Leyss.+Elymus nutans Griseb.+Festuca sinensis Qinghai+Poa crymophila var.Qinghai+Elymus sibiricus Qingmu No.1 can be used as establishment methods to restore the diversity of degraded grassland communities in the alpine zone of the eastern part of the Qilian Mountains.
高寒地区 / 人工草地 / 混播种禾草 / 植被特征 / 群落多样性
alpine region / artificial grassland / mixed components / vegetation characteristics / community diversity
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现代农业产业技术体系(CARS-35)
甘肃省青年科技基金计划项目(22JR5RA815)
甘肃省高等学校创新基金项目(2021A-270)
甘肃省自然科学基金项目(23JRRH0004)
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