Log volume table (GB 48 14-84) is the national standard of People's Republic of China (PRC). This standard was issued on 1984- 12-22 and implemented on1985-12-0/. This standard is approved by the National Bureau of Standards.

Fir wood

Chinese fir. ) hook. ), also known as sand tree, sand tree, etc. , belonging to coniferous trees, cetaceans, with a height of 30 meters and a DBH of 2.5-3 meters; Bark grayish brown; The winter buds are nearly round, the male cones are conical, the female cones are solitary, and the cones are ovoid, 2.5-5 cm long and 3-4 cm in diameter; The seeds are flat, covered by seed scales, ovoid or oblong, flowering in April, and the cones mature in late June. It is mainly used for expelling wind, relieving pain, removing blood stasis and stopping bleeding. And buildings, bridges, shipbuilding, columns, furniture, etc.

morphological character

Trees, up to 30m, DBH 2.5 ~ 3m；; ; The crown of young trees is pointed, the crown of big trees is conical, the bark is grayish brown, it splits into long strips and falls off, and the endothelium is reddish; Big branches are flat, branchlets are nearly opposite or whorled, often in two rows, and young branches are green, smooth and hairless; Winter buds are nearly round, with small leaflike bud scales, and flower buds are round and large.

The leaves are radial on the main branch, and the bases of the leaves on the lateral branches are twisted into two rows, lanceolate or strip-lanceolate, usually slightly curved and sickle-shaped. The leather is hard, 2-6 cm long and 3-5 mm wide, with fine missing teeth on the edge, and the top is tapered, sparse and dull. The top is dark green and shiny, and the stomata on both sides are narrow except the top and the base, and slight white powder or white powder is not obvious. The leaves of old trees are usually narrow, short and thick, and there are no stomatal lines on them.

Male cones are conical, 0.5 ~ 1.5 cm long, with short stalks and usually more than 40 clustered branches; Female cones are solitary or 2~3(4) in clusters, green, bract scales are transversely oval, with sharp apex, membranous upper edge, irregular teeth, equal length and width, about 3.5 ~ 4 mm.

Conical, 2.5 ~ 5 cm long and 3 ~ 4 cm in diameter; When mature, the bract scales are leathery, brownish yellow, triangular-ovate, about 65438 0.7 cm long and 65438 0.5 cm wide, with spines at the top and irregular serrations at the edge, and two sparse stomatal bands on both sides of the midvein on the back. The seed scales are very small, the apex has three leaves, the lateral fissure is large, the lobes are separated, the apex has irregular serrations, and three seeds are inserted on the ventral surface; The seeds are flat, covered by seed scales, oblong or oblong, dark brown and shiny, with narrow wings on both sides, 7~8mm long and 5 mm wide; Cotyledons, unearthed when sprouting. It blooms in April and cones 65438 10 mature in late October.