东北岩高兰具药用价值,其生长缓慢,在我国分布区域狭窄,属我国珍稀濒危植物。目前,国内外几乎没有围绕其生长特性方面展开的研究。以东北岩高兰为研究对象,将其新生枝分为延长枝、簇生枝以及腋生枝3种类型,比较不同类型东北岩高兰新生枝在石隙、林缘、疏林3种生境下的比例、长度、粗度、叶性状及生物量特征,初步探究其对3种生境的响应,为今后的培育与保护提供依据。结果表明,3种生境(石隙、林缘、疏林)下,延长枝与簇生枝是东北岩高兰新生枝最常见的类型,簇生枝中SP=2与SP=3最常见;林缘与石隙产生新生枝较疏林少,石隙叶面积及叶长宽比最大,花芽生物量最大,枝生物量较疏林小,有性繁殖能力更强;疏林产生新生枝较多,无性繁殖能力较强;不同生境且不同类型新生枝间平均长度均不存在显著差异,但疏林下其延长枝粗度显著大于林缘与石隙,且延长枝与簇生枝也存在显著差异(P<0.05)。

Empetrum nigrum var.japonicum has medicinal value,which grows slowly and has narrow distribution .It is a rare and endangered plant in China.With the Empetrum nigrum var.japonicum as the object of study,the new branches were divided into three types:extended branch,caespitose branch and axillary branch.Comparison of the proportion of new branch types,leaf traits and biomass in three habitats,provides useful information for cultivation and protection.The results showed that the extended branch and caespitose branch were the most common type of new branches,and SP=2,SP=3 was the most common type in the three habitats.There were fewer new branches in the forest edge and stone gap than in the sparse forest,the leaf area and the ratio of leaf length to width of the stone gap were the largest,the biomass of flower bud was the largest,the biomass of branch was smaller than that of the sparse forest,and the sexual reproduction ability was stronger.The ability of producing new branches is high and the ability of asexual reproduction is strong.There was no significant difference in the average length of new branches between different habitats and different types,but the diameter of elongated branches in sparse forests was significantly higher than that of forest edge and stone gaps,and there was also significant difference between extended branches and caespitose branches (P<0.05).