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tree height中文是什么意思

  • 樹(shù)高

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  • By using the total station , the accuracy of tree height measurement can reach 1 / 1400 ; that of volume measurement can reach 1 / 200
    由于全站儀的自動(dòng)化程度很高,可與數(shù)據(jù)采集器實(shí)現(xiàn)數(shù)據(jù)的實(shí)時(shí)通訊,提高工作效率。
  • Birds boost tree height up to 33 percent by munching on pesky parasites that can literally suck the life out of the tall - growing plants , a new study shows
    根據(jù)一項(xiàng)新研究顯示,鳥(niǎo)兒嚼食討厭的寄生蟲(chóng),可以促進(jìn)樹(shù)木的高度增加達(dá)33 % ,因?yàn)榧纳x(chóng)會(huì)把樹(shù)木的生命力吸食殆盡。
  • A medium - thick shelterbelt can reduce wind velocity by more than 10 percent to a distance of 20 times the tree height on the leeward side and three times the height to the windward
    中等厚度的防風(fēng)林在背風(fēng)側(cè)可在20倍于樹(shù)高的距離而在迎風(fēng)側(cè)則在3倍于樹(shù)高的距離上減小風(fēng)速10 %以上。
  • Total station , an electronic precise geodesic instrument , has been used in surveying forest area and tree height from 1990s in many developed countries , such as u
    摘要全站儀是一種電子精密測(cè)量型工具,自20世紀(jì)90年代中期后,美、英、德、日等國(guó)在林地面積測(cè)量、樹(shù)高測(cè)量中初步使用全站儀。
  • Result showed that different waterlogging depths have obvious effects on tree height , diameter at breast height , under branch height , trunk morphological structure , stem base form , and growth process
    結(jié)果表明:不同水分條件對(duì)池杉的樹(shù)高、胸徑、枝下高、干形、樹(shù)干基部形態(tài)及生長(zhǎng)過(guò)程均產(chǎn)生明顯的影響。
  • By using the total station , the surveyors can determine a set of measurable factors , such as upper diameter , diameter at breast - height and tree height , and then calculate the volume
    其測(cè)量樹(shù)高的精度可達(dá)1 / 1400 ,測(cè)量任一處直徑的精度可達(dá)1 / 200 ,且均高于其它測(cè)樹(shù)方法的精度,完全能夠滿足林業(yè)測(cè)量的精度要求。
  • Through the stand investigation by setting up the sample site , the investigation results showed that the average dbh of 15 - year - old alniqhtllm fortunei planted under nature was 60 % larger than that of 17 - year - old pinus massoniana plantation under the same condition , the average tree height of the above was 38 % larger than that of the latter , the average single - tree volume of the above was 3 . 2 times higher than that of the latter , the above showed the absolute dominance in stands
    摘要設(shè)立標(biāo)準(zhǔn)地進(jìn)行林分調(diào)查,在標(biāo)準(zhǔn)地中選取擬赤楊標(biāo)準(zhǔn)木進(jìn)行樹(shù)干解析,采用生長(zhǎng)對(duì)比方式分析擬赤楊在馬尾松人工林中的生長(zhǎng)情況,調(diào)查結(jié)果表明,在同一環(huán)境條件下, 15年生天然下種的擬赤楊比17年生馬尾松人工林平均胸徑大60 % ,平均樹(shù)高高38 % ,平均單株材積大3 . 2倍,在林分中表現(xiàn)出絕對(duì)優(yōu)勢(shì)。
  • The experimental results show that the characters of tree height , dbh , and volume , etc . of every family progenies of pinus massoniana seed orchard are all evidently higher than those of control ( ck ) , 7 fine family materials whose volume growth exceeds the control ' s by 50 % are totally selected as the materials for building p . massoniana improved seed orchard and industrial raw material forest
    摘要對(duì)漳平五一國(guó)有林場(chǎng)馬尾松種子園18個(gè)初選家系進(jìn)行子代測(cè)定,采用隨機(jī)區(qū)組設(shè)計(jì)、 8次重復(fù),對(duì)6年生的樹(shù)高、胸徑、材積等性狀進(jìn)行測(cè)定,試驗(yàn)結(jié)果表明:馬尾松種子園各家系子代均明顯高于對(duì)照( ck ) ,共選出7個(gè)優(yōu)良家系材積生長(zhǎng)超過(guò)對(duì)照50 %以上材料,作為營(yíng)建馬尾松改良種子園和工業(yè)原料林的材料。
  • The variable parameter taper equation was built with diameter determination datas of different parts of cryptomeria fortunei plantation sample wood , in combination with the relative tree height curve mode and other assistant equations , volume table of c . fortunei plantation standing was compiled , and provided the scientific basis for the production and application
    摘要利用柳杉人工林樣木各部位直徑測(cè)定數(shù)據(jù),建立可變參數(shù)削度方程,配合威布爾分布函數(shù)、相對(duì)樹(shù)高曲線模型及其他輔助方程,編制了柳杉人工林林分出材率表,為生產(chǎn)應(yīng)用提供科學(xué)依據(jù)。
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