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

作　　者：刘皓栋 郑彦丽 田启会[1] 贾万臣[1] 刘根新[1] 曹文侠[3] LIU Haodong;ZHENG Yani;TIAN Qihui;JIA Wanchen;LIU Genxin;CAO Wenxia(College of Animal Science and Technology,Gansu Polytechnic College of Animal Husbandry&Engineering,Wuwei 733006,China;School of Biological and Pharmaceutical Engineering,Lanzhou Jiaotong University,Lan-zhou 730070,China;College of Prataculture,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃畜牧工程职业技术学院畜牧科技学院,甘肃武威733006 [2]兰州交通大学生物与制药工程学院,甘肃兰州730070 [3]甘肃农业大学草业学院,甘肃兰州730070

出　　处：《甘肃农业大学学报》2024年第6期218-226,共9页Journal of Gansu Agricultural University

基　　金：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)。

摘　　要：【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 grass-lands 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 compo-sition and diversity indices,were measured and combined with grey correlation evaluation to select the opti-mal 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 com-bined 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 even-ness index of the five species were the highest of all the mixed grasses.Therefore,the mixed grassland treat-ments 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.

关 键 词：高寒地区 人工草地 混播种禾草 植被特征 群落多样性 

分 类 号：S812[农业科学—草业科学]