托克托县人工杨树林群落草本层植物种组成及多样性分析  

Analysis of Plant Species Composition and Diversity in Herb Layer of Poplar Plantation Community in Togtoh County

作　　者：冯倩男 张婷 韩静 荣傲登 蔡丽艳 FENG Qian-nan;ZHANG Ting;HAN Jing;RONG Ao-deng;CAI Li-yan(Inner Mongolia Institute of Forestry Monitoring and Planning,Hohhot 010020,China;Inner Mongolia Basic Geographic Information Center,Hohhot 010010,China)

机构地区：[1]内蒙古自治区林业监测规划院,内蒙古呼和浩特010020 [2]内蒙古自治区基础地理信息中心,内蒙古呼和浩特010010

出　　处：《内蒙古林业科技》2020年第3期43-49,共7页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自治区林地适宜性评价技术研究与应用项目。

摘　　要：以托克托县2016年森林资源规划设计调查数据为基础,测算主要优势树种杨树林群落草本层的重要值及植物多样性指数,分析其优势物种和植物多样性水平。托克托县人工杨树林群落草本层植物共有22科45属69种,其中蕨类植物有1科1属1种,被子植物有21科44属68种;杨树林群落草本层重要值最高的植物是狗尾草(0.1196),其次是牻牛儿苗(0.0525)和羊草(0.0513);4种多样性指数在杨树林群落各龄组中的规律一致:随着林龄的增加,Margalef指数、Shannon-Wiener指数、Simpson指数和Pielou指数均在近熟林达到最大值,分别为1.82、1.54、0.67和0.70,表明该地区杨树近熟林草本层的物种最丰富,多样性水平最高。Based on the data of design and survey for forest resources of Togtoh county in 2016,the important value and plant diversity index have been calculated,and then the dominant species and plant diversity level in herb layer of poplar plantation community has been analyzed.There are 69 species of herbaceous plants belonging to 45 genera and 22 families,including one species of ferns from 1 genera and 1 family,68 species of angiosperms from 44 genera and 21 families in poplar plantation community in Togtoh county.The important value of Setaria viridis is the highest(0.1196),and next come Erodium stephanianum(0.0525)and Leymus chinensis(0.0513).There is a same law for four diversity indexes in each age group of poplar community,as the increase of forest age,Margalef index,Shannon-Wiener index,Simpson index and Pielou index in near-mature forest reach the maximum,with 1.82,1.54,0.67 and 0.70 respectively,which shows there is the richest species and the highest diversity level in herb layer of near-mature forest of poplar.

关 键 词：人工杨树林 草本层 植物多样性 重要值 

分 类 号：S792.11[农业科学—林木遗传育种]