subalpine spruce and fir forest 亚高山云冷杉林
Based on a two-dimensional non-rank classification of two way indicativespecies analysis(TWINSPAN),spruce and fir forest communities in Northwest Sichuan and South Gansu are divided into 15 associations belonging to4 formations by using the DCA and TWINSPAN classification methods.
本文应用DCA二维散点非等级制分类和TWINSPAN等级制分类的方法进行了四川西北部和甘肃南部云冷杉林的数量分类，共划分出15个群丛，分属于云杉、冷杉、高山栎和桦木四个群系，并分别讨论了各群丛的特征。
参考来源 - 期刊学术社区·2,447,543篇论文数据，部分数据来源于NoteExpress
In Maine Daniel Jennings of the u. s. forest service has enlisted spiders in the war against the spruce budworm the northeast's most devastating enemy of spruce and fir forests.
在缅因州，美国林业局的丹尼尔·詹宁斯征募蜘蛛来与云杉芽卷蛾——东北部云杉和冷杉林最凶恶的敌人——作战。
Using typical sampling method, the paper studies the composition and important value of plant species in subalpine spruce fir forest on Northern Slope of Changbai Mts.
采用典型抽样方法，对长白山北坡不同海拔高度带云冷杉林的植物种类组成及重要值进行了初步研究。
The natural spruce-fir mixed stand is one of the main forest types in China, and also has large proportion in the civil and national consuming.
天然云冷杉针阔混交林是我国的主要森林类型之一，在国民用材中占有相当大的比重。
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