落叶松

Any of several deciduous, coniferous trees of the genus Larix, having needlelike leaves clustered on short shoots and heavy, durable wood.

落叶松属植物一种落叶树属的落叶性针叶树木，有成簇状针叶和重而坚硬的木质

Korean larch will expand northwestward 200 km in 2050yr;and more 200km in 2100yr.

气候变化极大地改变了三种落叶松的适宜分布区。

In the Larix Mill,there are evident differences between two groups on the seed coat ornamentation.

落叶松植物均为优良的用材树种，具有很高的经济价值和生态意义。

The results of this study indicated that L. gmelinii would transform each other at the different age and its transformation rate was 38.9% where the average stem was 50%, and the dominating stem and overtopped stem were all 33.3%.

结果表明，兴安落叶松分级木在不同年龄阶段有相互转换现象，其转换率38.9%，其中，平均木转换率占50%，优势木和被压木转换率均33.3%。

This paper expounded the growing characteristics of Larix gmelinii classified stem (dominant stem,average stem,overtopped stem) and analyzed the relation between the growing characteristics of classified stem and its stand factors and locality factors by setting plots and making trunk analysis.

本文通过设置样地，作树干解析，阐明了兴安落叶松天然林分级木(优势木、平均木、被压木)生长特性，并分析了分级木生长特性与林分因子和立地因子的关系。

However, the transformation rate from dominant stem to overtopped stem and from overtopped stem to dominant stem were the lowest. The interconversion of classified stem would increase as the stand density and the rate of L. gmelinii was going up. The altitude that classified stem mainly concentrated was less than 1000m, slope was less than 25°, aspect was south slope, position was at middle and lower, soil depth less than 17cm. The rate of no interconversion was 66.7% among overtopped stem. It should cut the overtopped stem as intermediate cutting.

优势木转被压木和被压木转优势木的转换率最低；随着林分密度和林分中落叶松比例增加，分级木相互转换数也增多；分级木转换现象主要集中在海拔＜1000m、坡度＜25°、坡向为阳坡、坡位为中下、土壤厚度＞17cm的林分中；被压木中，无转换的占66.7%，抚育采伐时应考虑伐除这些被压木。

The larch and pinewood walls were held by steel braces so they could be assembled without glue, bolts or nails.

落叶松和松林墙壁是由钢支架，使他们可以组装使用胶，螺栓或指甲。

According to the transition probability matrix combining with stand original distribution, the change of stand structure in fifteen years was modeled.

根据转移概率参数和进界生长参数可以得到落叶松的转移概率矩阵，结合其初始分布可模拟15年后林分的结构变化。

Larix kaempferi is one of the most important coniferous species for pulpwood in China.

日本落叶松是我国主要针叶纸浆用材树种。

Using this model system, development of quadratic mean diameter, mean height, the number of surviving trees per hectare, stand basal area, and stand volume can be simulated for various levels of initial density and site.

采用该模型系统即可以模拟落叶松人工林不同林分条件下的林分平均胸径，平均树高，每公顷株数，林分断面积和林分蓄积量的生长过程。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。