环孔材

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 .

东北重要阔叶树环孔材超微结构研究

Study on the ultrastructure of ring porous woods of main hardwoods in Northeast of China

结果表明其木材为环孔材；

The result showed that the wood is belong to the perforation 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 .

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 .