标准木

林分材积计算的标准木方法的误差分析及校正

Error analysis and corrections for calculation of timber volume using standard sample trees

立地异质空间下，楠木单株标准木的平均生物量差异显著。

The average biomass of single tree was different greatly in heterogeneous spatiality of site .

按5个地位级模拟了平均标准木、优势木的树高、胸径、蓄积生长的理查德曲线、修正指数曲线模型；

For another , richards Curve Model as well as Modified Index Curve Model of average standard trees ' height .

测定林分蓄积量的新方法&假想标准木法

A NEW MEASURE FOR SURVEYING STAND VOLUME & Method of Supposed Mean Sample Trees On The Criterion of Conscientious Law

采用平均标准木法对五倍子蚜虫夏寄主主要树种盐肤木和红麸杨人工幼龄林的生物量及其分配进行了测定和研究。

The biomass and its allocation of the young plantation of Rhus chinensis and R. punjabensis was determined with the average standard tree method .

结果表明，通过标准木的标准比导率和树木胸径和边材面积的相关模型，可以比较准确地推算出林分的蒸腾耗水量。

The results show that the water consumption of transpiration can be reckoned through standard specific conductivity of standard tree and the relative model between breast height diameter of tree and sapwood area .

低密度空间（1500～1650株·hm~2）楠木单株标准木的平均生物量为56.52kg·株~（-1），是高密度空间（2200～2400株·hm~2）的1.39倍。

In lower density spatiality ( 1500-1650 trees / hm ~ 2 ), the average biomass of single tree was 56.52 kg / tree , which was as large 1.39 times as higher density spatiality .

根据江苏沿海地区水杉林带中33株标准木生物量的测定资料，分析了不同立地类型、不同林龄阶段水杉林带生物产量的结构特征。

An analysis has been made of the time space structure feature of biomass in different sites and periods according to the determined biomass data from 33 felling trees in down redwood shelter belt in the coastal region .

本文采用标准木回归分析法（乔木层、木质藤本）和样方收获法（灌木层、草本层）研究了西双版纳湿性季节雨林生物量及其分配规律。

The biomass and its allocation of a tropical wet seasonal rain forest in Xishuangbanna were studied based on the standard tree regression analysis ( for trees and lianas ) and clear cut method ( for shrub and herb ) .

通过固定标准木、定期采样和化学测定，分析了秦岭锐齿栎林叶内营养元素含量的径阶、冠向、冠层、海拔和生长季节变化规律。

The foliage nutrient contents of sharptooth oak stands in Qinling Mt. with different diameter classes , crown directions , crown layers , elevations and seasonal variation have been studied in this paper by fixed sampling trees , regular samplings and chemical analysis .

本文在对6年生杉木和马尾松标准木调查的基础上，应用相关分析方法，找出杉木和马尾松幼林各器官生物量与树高、胸径之间的相关关系。

In this paper , based on the surveys of the mean Chinese fir and masson pine trees at the age of six , the relations between various organs of tree , tree height and diameter at breast are obtained by the method of correlation analysis .

2001年4&10月，应用热扩散技术研究北京西山地区31年生油松栓皮栎混交林标准木的比导率并对13个环境因子的变化规律进行同步观测。

From April to October of 2001 , the standard trees of a 31 years old Pinus tabulaeformis and Quercus variabilis mixed stand were studied on its specific conductivity using thermal dissipation technology , and 13 environmental factors in western mountain area of Beijing were measured simultaneously .

由于樟子松结实不仅受自身条件所限，同时受外界环境影响较大，因此，采用平均标准木法建立的模型只能作为各径级结实能力的预测。

Because the Pinus sylvestris var. mongolica solid not only is limited by own conditions , at the same time is effected greatly by external environment , therefore , the establishment model using the even standard wooden method can only be able to forecast fruiting ability of various diameters level .

木结构螺栓连接的承载能力&对国际标准化协会木结构设计规范螺栓连接计算公式的建议

Behaviour of Bolted Joint in Timber ; Structure and Design Formulae

对色木径向、弦向、非标准向压缩木的吸水性测试结果表明：不论哪个方向压缩，压缩木压缩方向上的膨胀率明显高于非压缩方向的膨胀率；

Water absorbing capacities of mono maple 's radial , tangential and non standard direction compressed wood were tested , results are as follows . Swelling efficiency in compressed direction was obviously higher than that in non compressed direction whichever direction was chosen to be compressed .

通过杨树标准地和解析木的调查分析，建立了预测精度较高的杨树生长收获模型。

On the basis of analyzing and investigating the plots and stem analysis of poplar , the growth and yield models of poplar were established .

本文用在陕西主要林区调查的油松标准地、标准木材料，就树冠率和平均高对相对干形的影响进行了研究。

Effects of crown ratio and mean height on the relative stem form were studied by sample plots and sample trees for Pinus tabulaeformis in main forested region of Shaanxi .

收集了近50年满归林业局四次森林经理调查的数据，林相图，森林调查数据库及128块标准地，标准木384株、解析木21株的数据。

Data of 4 times forest management inventory , forest map , forest inventory database , 128 plots , 384 standard trees and 21 stem analysis trees almost 50 years were collected .

根据胶合木的主要物理力学性能和我国住宅建筑模数协调标准，借鉴国外木结构的结构形式，确定胶合木结构住宅的基本结构形式为梁柱承重的框架体系。

Confirming Post-Beam frame as the basic type of glued laminated timber structure according to the Glulam physical mechanic features , our Building Modular Coordination Standard and structure type of foreign timber structure .

由生长季可用降水量、生长季标准比导率和不同年龄林分标准木胸径处的边材面积，推出在特定降雨环境下林分的合理密度。

Finally , reckoning the reasonable density of stand under a given rainfall environment based on available rainfall and standard specific conductivity of growing season , as well as the sapwood area of standard tree at breast height diameter for different ages .