光稃茅香典型植物群落结构及其多样性对土壤含水率的响应  

Response of Typical Plant Community Structure of Anthoxanthum glabrum and its Diversity to Soil Moisture Content

作　　者：吕亮雨 蔡宗程 施建军[1] 雷莎清 王琛 LV Liangyu;CAI Zongcheng;SHI Jianjun;LEI Shaqing;WANG Chen(Academy of Animal Husbandry and Veterinary Sciences,Qinghai University,Xining 810016,China;Kunlun College,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学畜牧兽医科学院,青海西宁810016 [2]青海大学昆仑学院,青海西宁810016

出　　处：《高原科学研究》2024年第1期9-17,共9页Plateau Science Research

基　　金：高寒高效饲草料基地建设关键技术集成与示范项目(2023-NK-P56);第二次青藏高原综合科学考察研究项目(2019-QZKK-1002).

摘　　要：文章以5种不同土壤含水率下的光稃茅香群落为研究对象,分析了群落的物种组成、物种重要值和多样性指数。结果表明:5个群落共有15种植物,属11科14属,植物群落优势种分别为光稃茅香(Antho-xanthum glabrum)、光稃茅香(Anthoxanthum glabrum)+短穗兔耳草(Lagotis brachystachya)、光稃茅香(An-thoxanthum glabrum)+西藏沙棘(Hippophae thibetana)+冷蒿(Artemisia frigida)+多裂委陵菜(Potentilla mul-tifida)、光稃茅香(Anthoxanthum glabrum)+短穗兔耳草(Lagotis brachystachya)、光稃茅香(Anthoxan-thum glabrum)+赖草(Leymus secalinus)+冷蒿(Artemisia frigida)。该研究选取的样地3的光稃茅香群落丰富度指数Ma、Simpson多样性指数D、Shannon-Wiener指数H达到最大,分别为1.53、0.58、1.38,明显高于其他4个样地(P<0.05);样地5的Pielou均匀度指数J和物种优势度指数d最大,分别为0.63、1.78。样地1的地上生物量最大,达到857.3g·m^(-2),较样地2、样地3、样地4、样地5分别高46.47%、112.35%、192.27%、506.60%,差异显著(P<0.05)。综上所述,土壤含水率的不同可能是驱动草本植物群落结构及其多样性和生物量变化的重要因素。In this study,the species composition,species importance value and diversity index of A.glabrum community were analyzed under 5 different soil moisture content.There are 15 species belonging to 11 families and 14 genera in 5 communities.The dominant species in 5 plant community are Anthoxanthum glabraum,An-thoxanthum glabrum+Lagotis brachystachya,Anthoxanthum glabrum+Hippophae thibetana+Artemisia frigi-da+Potentilla multifida,Anthoxanthum glabraum+Lagotis brachystachya,Anthoxanthum glabraum+Leymus secalinus+Artemisia frigida,respectively.The richness index Ma,Simpson diversity index D and Shannon-Wie-ner index H of plot 3 reached the maximum with 1.53,0.58 and 1.38 respectively and were significantly higher than the other four plots(P<0.05).Pielou evenness index J and species dominance index d of plot 5 are the larg-est with 0.63 and 1.78 respectively.The aboveground biomass of plot 1 was the largest reaching 857.3 g·m^(-2),which was significantly higher than 46.47%,112.35%,192.27%and 506.60%of plot 2,plot 3,plot 4 and plot 5 respectively(P<0.05).To sum up,the difference of soil moisture content is one of the important factors driving changes in the structure,diversity and biomass of herbaceous plant community.

关 键 词：三江源区 光稃茅香 群落结构 物种组成 物种多样性 

分 类 号：S54[农业科学—作物学]