Acid rain affected tree growth slower, tree ring width narrowerr and basic density lower.
通过对受害材与健康材的年轮宽度和基本密度的对比研究 ,可以看出酸雨对杨树生长产生了显著的影响 。
Using the WinDENDRO~(TM) analysis system of tree-ring image,the authors measured the age and tree-ring width.
为了研究天然臭柏种群的径向生长发育规律,根据群落的更新进程,将毛乌素沙地的天然臭柏群落划分为4个发育阶段,采用样地调查法,调查各个发育阶段的地径和匍匐茎长度,采集地径及距地径20 cm处的树盘;用WinDENDROTM年轮图像分析系统测定年龄及年轮宽度,分析毛乌素沙地不同发育阶段天然臭柏的径向生长特性。
On the basis of summarizing the measures of tree-ring width,this paper puts forward a new method to measure tree-ring width using digital image form flatbed scanner and computer.
提出了利用平板扫描仪、电脑等常规办公设备测量树木年轮宽度的数字图像测量方法,分别应用数字图像测量法和树木年轮分析仪测量了5个年轮圆盘的宽度,以年轮分析系统为基准,对数字图像法进行了精度检验,并从测量效率、经济成本等方面对两种方法进行了综合对比分析。
As is considered to be more correlative to environment factors, tree-ring area has been increasingly admitted by scholars recently, but it can not be measured directly by traditional methods, instead, it just estimate value based on tree-ring width.
树木年轮宽度是树木年轮学中的经典研究对象之一,目前年轮宽度的测量主要依靠人工操作,视力劳动强度大,而且测量结果还在很大程度上依赖于测量者的经验和操作水平;年轮面积是近年来被越来越多的学者承认的与环境因子更为相关的年轮特征量,但是它依靠传统的测量手段不能准确测得,通常是在宽度基础上估计的。
A tree-ring width chronology has been built from Larix chinensis at the divide sampling site in the mid-Qinling Mountains from 1814 to 2003.
根据秦岭中段分水岭地区秦岭落叶松树轮宽度指标,建立了该地区1814—2003年的树轮标准化年表。
Based on the investigation data of Sabina przewalskii tree-ring width at six sites at upper timberlines in eastern mountainous region of Qaidam Basin, the standard tree-ring chronologies of S.
利用柴达木盆地东缘山地祁连圆柏林上限6个样点树轮宽度资料建立了标准年表,通过聚类分析发现,样点间树木径向生长具有不同的亲疏关系。
Horizontal variations in ring width and tracheid length of Pinus sylvestris var. mongolica in Zhanggutai
章古台地区樟子松年轮宽度和管胞长度的径向变异
Response of ring width and ring density to climate variance was studied by theories and techniques of dendrochronology including response functions analysis and multiple regression analysis for Platycladus orientalis in Beijing, China.
通过响应函数分析和多元回归分析等年轮气候学方法,研究北京地区侧柏年轮宽度和年轮密度对气候变化的响应。
Two groups of wood(wet and air-dry wood) were tested to investigate the effects of flooding on the moisture content and ring width of Pterocarya stenoptera.
就淹水程度对2组枫杨材(湿林、气干材)年轮宽度、含水率的影响进行研究。
Method for determination of the annual rings width and latewood rate of wood
GB/T1930-1991木材年轮宽度和晚材率测定方法
Horizontal variations in ring width and tracheid length of Pinus sylvestris var. mongolica in Zhanggutai
章古台地区樟子松年轮宽度和管胞长度的径向变异
The Study on the Response of Contemporary Tree Ring Width of Castanopsis Fargesi and Cinnamomum Camphora to Climate Change in Dagangshan;
大岗山丝栗栲和樟树年轮宽度对气候变化响应研究
Development of the Tree-ring Width Chronologies in the High-elevation Regions in the Middle and East Tianshan Mountains;
天山北坡中东部高海拔树轮宽度年表的建立
Tree-ring Width Chronology Characteristics in Nileke Area of Yili in Xinjiang
新疆伊犁尼勒克地区树轮宽度年表特征分析
Characteristics of millennial tree-ring width variations of Qilian juniper in Shalike Mountain, Qinghai
青海沙利克山祁连圆柏千年树轮宽度序列的变化特征
Flat belt drive Belt and pulleys-widths
GB/T11359-1989平带传动平带及带轮的宽度
Design of a Portable Instrument about the Width of Turbine's Steam Passage
手执式汽轮机汽道宽度测量仪的研制
Influence of Sampling Site and Detrending Method on correlations and climate signals of spruce chronologies of tree-ring width from upper tree line in the western Tianshan Mountains of Xinjiang
采点和去趋势方法对新疆天山西部云杉上树线树轮宽度年表相关性及其气候信号的影响
During unsaturated growth, the width of the spectral profile will decrease.
在非饱和增长期间，谱线轮廓的宽度将减
Belt drives--Grooved pulleys for joined classical V-belts (effective system)
GB/T17197-1997带传动联组普通V带轮(有效宽度制)
Weight Round Robin Scheduling Algorithm in Broadband Wireless Internet Network
宽带无线因特网络中的加权轮循调度算法
Estimating for Escaping Accident Vehicle Types Using Tyre Trace Width;
利用轮胎痕迹宽度判断肇事车型的研究
Response of Annual Ring Width of Pinus sylvestris var. mongolica Plantation to Climate Change
人工林樟子松生长轮宽度对气候变化的响应
Response of growth-ring width of Pinus koraiensis in artificial forest to climate change
人工林红松生长轮宽度对气候变化的响应
Optimized analysis on chafer width of TBR tire
全钢载重子午线轮胎胎圈包布宽度优化分析
CALCULATION AND DISCUSSION ABOUT WIDTH OF RIM NOTCH OF WHEEL-PROTECTING TRACK
冶金企业铁路曲线护轮轨轮缘槽宽度的计算与探讨
Study on the Radial Variations of Growth Ring Width,Air-dried Wood Density and Fiber Length of Toona sinensis(A.Juss.)Roem.and Their Relativity
香椿生长轮宽度·木材气干密度·纤维长度径向变异及其相关性研究
