白材兴安落叶松的研究

STUDY ON DAHURIAN LARCH OF WHITE WOOD

报道了兴安落叶松一个变型——白材兴安落叶松〔Larix gmelinii(Rupr.)Rupr.f.chlorocarpa(Miyabe et Miyake)P.H.Huang et L.H.Zhuo〕.其与原变型主要区别在于幼球果绿色或淡绿色,木材淡黄白色.在相同的条件下,其生长优于原变型.在木材力学品质因数中,它有比较高的抗弯强度、顺纹抗压强度、冲击韧性和抗弯弹性模量.它的木材强重比高,硬重适中.加工性能较好,使用范围较广,很适用于家具、地板块、室内装饰、门、窗和胶合板等,其利用价值优于原变型.因此,它是林业生产上选育推广的一个速生、优质的类型.

This paper reports a form of Dahurian Larch--Larix gmelinii (Rupr.)-Rupr. f.chlorocarpa (Miyabe et Miyake) P. H. Huang et L. H. Zhuo. It isMainly distinguished from the typical form by its green or greenish young conesand yellowish white wood. The form is superior to the typical form as a growthrate under the same condition. In quality factors of wood mechanics, it hasrelatively high bending strength, compressive strength parallel to grain, toughnessand nodulus of elasticity in static bending. The wood is high in strength--to-weight ratio. suitably hard and heavy, relatively good in workability andrelatively wide in usable scope, and very suitably used for furniture, floor lumps,interior decoration, door, window and plywood, etc.. It is superior to the typicalform as a valuable timber tree. Therefore, it is a form of fast-growing and highquality for forestry production.