軟木：修订间差异

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2006年6月5日 (一) 05:26的版本

軟木（softwood）是由松柏植物門的樹所生成的木材。軟木樹包括松树、雲杉、香柏、冷杉、落葉松、花旗松、鐵杉、柏樹、加州紅木及紫杉等。如名稱所示，軟木一般質地比硬木為軟，但不同品種間存有差異及互相重疊，紫杉是一種長葉松，比大部分硬木還要堅硬，而技術上屬於硬木的輕木則十分軟。

The distinction between softwood and hardwood is also based on differences in microscopic structure; most important the lack of vessel elements for water transport in softwoods. The structure is generally more simple and uniform as there are only two types of cells; tracheids and parenchyma cells. Softwood is easy to saw and is usually put to work in structural building components. It is also found in other products such as millwork (mouldings, doors, windows) and furniture.

Softwood is also harvested for use in the production of paper, and to create chipboards such as Medium-density fibreboard (MDF).

References

Timonen, Tuuli (2002). Introduction to Microscopic Wood Identification. Finnish Museum of Natural History, University of Helsinki.
Wilson, K. & D.J.B. White (1986). The Anatomy of Wood: its Diversity and variability. Stobart & Son Ltd, London.

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-[[Image:Cedrus wood.jpg|250px|right|thumb|Despite being fairly hard, 雖然質地頗為堅硬，[[香柏]]是軟木木材]]
+[[Image:Cedrus wood.jpg|250px|right|thumb|雖然質地頗為堅硬，[[香柏]]是軟木木材]]
+ '''軟木'''（'''softwood'''）是由[[松柏植物門]]的[[樹 (生物)|樹]]所生成的[[木材]]。軟木樹包括[[松科|松树]]、[[雲杉]]、[[香柏]]、[[冷杉]]、[[落葉松]]、[[花旗松]]、[[鐵杉]]、[[柏科|柏樹]]、[[加州紅木]]及[[紫杉]]等。如名稱所示，軟木一般質地比[[硬木]]為軟，但不同品種間存有差異及互相重疊，紫杉是一種[[長葉松]]，比大部分硬木還要堅硬，而技術上屬於硬木的[[輕木]]則十分軟。
-[[Wood]] from [[conifer]]s are generally referred to as '''軟木'''（'''softwood'''）; the term is also used as an adjective for the trees that produce softwood. Softwood trees include [[pine]], [[spruce]], [[cedar]], [[fir]], [[larch]], [[douglas-fir]], [[Tsuga|hemlock]], [[cypress]], [[Sequoia|redwood]] and [[yew]]. As the name suggests, the wood of softwoods is often softer than that of [[hardwood]]s, though there is considerable variation between species and much overlap - the wood of yews, for example, is much harder than most hardwoods, as is the wood of [[Longleaf pine]], while the wood of [[Balsa]] (technically a hardwood species) is extremely soft.
 The distinction between softwood and hardwood is also based on differences in microscopic structure; most important the lack of [[vessel elements]] for water transport in softwoods. The structure is generally more simple and uniform as there are only two types of cells; [[tracheid]]s and [[parenchyma cells]]. Softwood is easy to saw and is usually put to work in structural building components. It is also found in other products such as millwork (mouldings, doors, windows) and furniture.