betula 中文意思是什麼

betula 解釋
樺木屬
  1. We still skim the backwaters of ponds and streams for the seed of betula, acer salix and populus species.

    我們仍然要在池塘的靜水上和溪流中撈取樺木,槭樹、楊、柳等樹的種子。
  2. Analysis of genetic relationship of betula among species using rapd marker

    標記技術對樺樹種間親緣關系的分析
  3. Anatomical study on morphogenesis in vitro culture from betula platyphylla

    白樺組培離體再生的解剖學研究
  4. Toadstools were collected from a range of pure stands of betula and pinus both in britain and the u. s. a.

    從英國和美國一系列樺木和松樹純林中收集蕈體。
  5. 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

    該區北部目前還保存有空間上完整的植被正向演替系列,即棄耕地先鋒群落草本群落(白羊草bothriochloaischemum 、茭蒿artenmisiagiradii +長茅草stipabungeana 、鐵桿蒿artenmisiasacrorum 、大油芒spodiopogensibiricus +苦參sophoraflavecens 、黃菅草themedajaponica或野古草arundinellaanomala )灌叢群落(沙棘hippophaerhamnoides 、狼牙刺sophoraviciifdia 、虎榛子ostryopsisdavidiana )早期森林群落(喬灌群聚、山楊populusdavidiana 、白樺betulaplatyphylla 、側柏platycladusorientalis 、 )遼東櫟群落( quercusliaotungensis ) 。
  6. This paper investigated the fungus flora of 8 main tree species, which are pinus tabulaeformis, larix principis - rupprechtii mayr, betula platyphylla suk, ostryopsis davidiana decne, ulmus pumila l., quercus liaotungensis koidz, populus davidiana dode, prunus ansu, in daqingshan mountain

    大青山地區環境惡劣、植被破壞嚴重,利用菌根生物技術實現植被恢復是一個重要方向。本文對大青山8個主要樹種,即:油松、落葉松、白樺、虎榛子、榆樹、遼東櫟、山杏菌根資源及生態進行了調查。
  7. Competition among dominant species in forest of betula luminifera

    光皮樺林優勢樹種間的競爭
  8. Interspecific association of dominant species in betula luminifera natural forest communities of shaowu, fujian province

    光皮樺天然林群落優勢種群的種間聯結性研究
  9. Abstract : soil fertility of the plantations of paramichelia baillonii, betula alnoides, acacia mangium and altingia excelsa in tropical area of yunnan does not decline rapidly, and the physical and chemical properties of forestland are not affected greatly if the plantations can be managed properly

    文摘:在雲南熱區營造山桂花、西南樺、馬尖相思、高阿丁楓等4種人工林,只要經營得當,對林地土壤理化性質並不造成重大影響,不會引起地力迅速衰退。
  10. Mechanical properties of castanopsis hystrix and betula alnoides plantation wood

    紅錐和西南樺人工林木材力學性質的研究
  11. Shrinkage characteristics of castanopsis hystrix and betula alnoides plantation wood

    紅錐和西南樺人工林木材幹縮特性的研究
  12. Hereby, it may probably concern this band as a partial segment of pectinesterase of betula platyphalla

    據此,可初步確定此片段是白樺果膠酶基因的部分片段。
  13. Selection of betula luminifera and the effect analysis

    光皮樺優樹選擇及效果分析
  14. The paper studies composition of grasshopper community in different habitats, found that differences in family, genus and species and analyzed the causes of those. the author analyzed the following aspects by spss software and the measure of euclidean distance : ( 1 ) analyzed the relationship between grasshopper species and geographical distribution and divided 9 forestry belt into 3 main habitat model : low mountain conifer and broadleaf integrated forestry belt ; low mountain chanbai conifer forestry belt and middle - high conifer - betula ermam / - tundra belt ; adopted sum of deviation of square to clustered ecological species groups, and thus divided 48 grasshopper species into 3 main category, 12 ecological species groups

    在長白山地區蝗蟲生態分佈特點的研究中,主要應用spss軟體包、採用euclideandistance測度法對以下兩方面內容進行了分析: ( 1 )對長白山地區蝗蟲地理分佈關系進行了分析,將長白山9個林帶劃分為三大生境型:低山針闊葉混交林帶、低山長白松林帶和中高山針葉?岳樺?苔原復合體; ( 2 )利用離差平方和法對生態種組進行等級聚類,結合實地調查結果,將48種蝗蟲劃分為三大類12個生態種組。
  15. Studies on observation of growth rhythm of young betula luminifera

    光皮樺幼林生長節律的觀察研究
  16. Antitumor activity on ascites tumor and effect on macrophage of extraction from betula platyphylla

    白樺樹皮提取物的抗腹水型腫瘤作用及對腹腔巨噬細胞功能的影響
  17. The fcature of betula luminifera seed

    光皮樺種子質量特徵
  18. Study on pre - humidification treatment for ultra - dried betula luminifera seeds

    光皮樺超干種子回濕方法研究
  19. Temporal characteristics of developmental cycles of female and male flowers in betula platyphylla in northeastern china

    白樺雌雄花發育周期的時序特徵
  20. Analysis on community structure and species diversity of natural forest of betula luminifera

    光皮樺天然林群落結構及物種多樣性分析
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