tree height造句
例句与造句
- By using the total station , the accuracy of tree height measurement can reach 1 / 1400 ; that of volume measurement can reach 1 / 200
由于全站仪的自动化程度很高，可与数据采集器实现数据的实时通讯，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
根据一项新研究显示，鸟儿嚼食讨厌的寄生虫，可以促进树木的高度增加达33 % ，因为寄生虫会把树木的生命力吸食殆尽。 - 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
中等厚度的防风林在背风侧可在20倍于树高的距离而在迎风侧则在3倍于树高的距离上减小风速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
摘要全站仪是一种电子精密测量型工具，自20世纪90年代中期后，美、英、德、日等国在林地面积测量、树高测量中初步使用全站仪。 - 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
结果表明：不同水分条件对池杉的树高、胸径、枝下高、干形、树干基部形态及生长过程均产生明显的影响。 - It's difficult to find tree height in a sentence. 用tree height造句挺难的
- 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
其测量树高的精度可达1 / 1400 ，测量任一处直径的精度可达1 / 200 ，且均高于其它测树方法的精度，完全能够满足林业测量的精度要求。 - 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
摘要设立标准地进行林分调查，在标准地中选取拟赤杨标准木进行树干解析，采用生长对比方式分析拟赤杨在马尾松人工林中的生长情况，调查结果表明，在同一环境条件下， 15年生天然下种的拟赤杨比17年生马尾松人工林平均胸径大60 % ，平均树高高38 % ，平均单株材积大3 . 2倍，在林分中表现出绝对优势。 - 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
摘要对漳平五一国有林场马尾松种子园18个初选家系进行子代测定，采用随机区组设计、 8次重复，对6年生的树高、胸径、材积等性状进行测定，试验结果表明：马尾松种子园各家系子代均明显高于对照( ck ) ，共选出7个优良家系材积生长超过对照50 %以上材料，作为营建马尾松改良种子园和工业原料林的材料。 - 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样木各部位直径测定数据，建立可变参数削度方程，配合威布尔分布函数、相对树高曲线模型及其他辅助方程，编制了柳杉人工林林分出材率表，为生产应用提供科学依据。