山杨 meaning in Chinese
aspen
populus davidiana
Examples
- Study on the degrading ability to david poplar lignin of six species of wood white - rot fungi
6种木材白腐菌对山杨材木质素分解能力的研究 - In different phases of development , vegetation systems in this region have changed from pioneer herbage species initially recovering in abandoned cropping lands ( bothriochloa ischemum , artenmisia giradii and stipa bungeana , artenmisia sacrorum , spodiopogen sibiricus and sophora flavecens , themeda japonica , and arundinella anomala ) to secondary shrubs ( hippophae rhamnoides , sophora viciifdia , and ostryopsis davidiana ) , early forest community ( populus davidiana , betula platyphylla and platycladus orientalis with arbors or shrub assembling ) , and finally liaotungesis community as the mature forest . in this study , soil profiles ( 0 - 5 , 5 - 15 , 15 - 25 , 25 - 35 , 35 - 50 cm soil layers ) were selected from typical vegetation systems representing for vegetation successions in the region
该区北部目前还保存有空间上完整的植被正向演替系列，即弃耕地先锋群落草本群落(白羊草bothriochloaischemum 、茭蒿artenmisiagiradii +长茅草stipabungeana 、铁杆蒿artenmisiasacrorum 、大油芒spodiopogensibiricus +苦参sophoraflavecens 、黄菅草themedajaponica或野古草arundinellaanomala )灌丛群落(沙棘hippophaerhamnoides 、狼牙刺sophoraviciifdia 、虎榛子ostryopsisdavidiana )早期森林群落(乔灌群聚、山杨populusdavidiana 、白桦betulaplatyphylla 、侧柏platycladusorientalis 、 )辽东栎群落( quercusliaotungensis ) 。 - This proof following enterprise already through the authentication , and has set up a file in the dongguan 114 nets industry and commerce enterprise database , inquires the more detailed enterprise material , please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ) , this enterprise numbers for 17626
兹证明东莞市大岭山杨屋振兴加工油站已通过认证，并已在东莞114网工商企业数据库中备案，查询更详细的企业资料，请拨东莞企业查询台96060 （人工） 9686810114 （自动） ，该企业编号为17626 。 - Ecological features , function indicators and social - human impact together constitute the fundermental system of regional ecosystem health assessment . haxi forestry center is located in tianzhu of gansu province . in view of the natural conditions , land use type and forest map , we classify the research area into 15 landscape types
甘肃天祝县哈溪林区位于祁连山东段，依据哈溪林区的自然条件、土地类型和林相图，将研究区划分为苗圃，未成林地，宜林地，农田，牧草地，荒地，青海云杉林，祁连圆柏，针叶混交林，杨类阔叶林，红桦、榆、山杨硬阔林，针阔混交林、灌木林、疏林地和阔叶混交林等15种景观类型。 - In 0 - 200cm light dried layer was formed and can be recovered partly after rainfall , but beneath 200cm the serious perpetual dried layer has lower water content and larger thickness and is very difficult to be recovered in short period because of the special hydrological characteristics in the loess plateau where infiltration depth is about 200cm and could not percolate into deeper layer . ( 4 ) the landscape ecology in fuxian county shows that the two kinds of forest community have not declined
( 4 )富县天然山杨林和天然辽东栎林的景观生态特征表明，两类森林群落没有出现衰退的迹象，这说明森林群落合理的内部结构不会造成林地土壤水分的严重亏缺，其自然气候条件可以满足森林群落生存、发展的需要。