散孔材

三叶木通茎的次生结构，其横切面近似圆形，生长轮明显，散孔材。

The secondary structure of stem of A. trifoliata : the transverse section of stem is circinal , with obvious growth ring . It is diffuse-porous wood .

生长轮类型分为环孔材、散孔材和半环孔材（或半散孔材）。

The growth rings of broad leaved woods can usually be divided into three types according to the size of vessels , i. e. ring-porous wood , diffuse-porous wood and semi - ring-porous wood .

东北六种阔叶树散孔材超微结构观察

Ultrastructure of six broadleaved species of diffuse porous in Northeast China

研究白檀茎次生木质部结构研究，其为散孔材。

The study on the stem secondary xylem of Symplocos paniculata , reveals the wood belongs to diffuse-porous wood .

长白忍冬根、茎的次生结构组成成分相似，均属散孔材。

The secondary structure of root and stem of Lonicera ruprechtiana Regel has similar characteristics , belongs to diffuse-porus wood .

对采自广西的山茶属9个组43种的木材进行解剖研究，结果表明，管孔类型为散孔材至似半环孔材；

Anatomical structure of Camellia wood of 43 species belonging to 9 groups from Guangxi was studied in this paper . The results were as follows .

研究结果表明：越南安息香为散孔材至半散孔材、结构均匀、细致。

The main results of the thesis are presented below : Styrax tonkinensis is diffuse porous to semi-diffuse porous wood , the uniform structure and fine .

环孔材树种导管比散孔材导管和无孔材管胞输水效率高，但它比后两者更容易发生空穴和栓塞。

The water transport efficiency in ring-porous species vessels is higher than that in diffuse-porous species and none - porous species , but ring-porous species vessels more easily occur embolism .