pine wood pileIt is a deciduous tree of the Pinaceae family. It is the main forest component of the forest areas in Northeast my country, Inner Mongolia, and the alpine coniferous forests of Northern and Southwest China. It is one of the three major coniferous forest species in Northeast China. Kara pine The natural distribution is very wide. Cold temperate and temperate tree species. It is difficult for coniferous species, and their vertical distribution reaches the upper limit of their forest distribution. The natural distribution and artificial cultivation of pine in northern my country mainly include Manchurian pine, Manchurian pine , Manchurian pine, Manchurian pine and Manchurian pine.

The pine stump of the black pine tree has a straight trunk and some knots. The difference between heartwood and sapwood is important. The material is hard, the structure is somewhat thick, and the texture is straight. It is the wood with strong corrosion resistance and mechanical properties among pine trees .Suitable for construction and telegraph poles, bridges, boats, pillows, wood, pillars, furniture, electrical appliances and wood fiber industrial raw materials. The height of the tree is 35 meters, and the diameter at breast height is 90cm. The bark is gray, dark gray or gray Brown, with deep grooves, vertical scales and reddish-purple drop marks. The broken part is dark brown. The flesh is bright red. The difference between the heart and sapwood is obvious. The sapwood is yellowish-white, slightly brown, The heartwood is yellowish-brown to brown. The boundaries of one year are clear. The tree has light buds. The 1-year-old branches are very thin, about 1 mm in diameter, light yellowish brown or light brown, hairless or sparse, with long hairs at the base, brown, grayish brown or gray, 2-year-old or 3-year-old branches. The short branches are 2-3 mm in diameter, and the tall branches are almost white with long hairs. Winter buds are almost round or oval, and the scales of the buds are dark brown. , with brown eyebrows on the edges. The leaves are oval, flat, 1.3-3cm long, 0.5-1.0 mm wide, with a flat surface, one or 2 hole lines on each side, and a raised midrib on the back, 2 sides. There are 2 or 3 pore lines. Conical mature, the upper seed scales are open, cup-shaped or oval, yellowish brown, light brown or sometimes purple, 1.2-2.5cm long, 1-2cm in diameter, seed scales 16 ~ 30 pieces. Moderate seed scales eclectic, oval, hairless, glossy. Scales of tassels short, 1\/3-1\/2 of seed scales, ovate-lanceolate, central rib extending to a point , pointed head. The seeds are diagonally oval, gray-white, with light brown markings. The length of the wings is about 1cm. The middle and lower parts of the seed wings are very wide, and the apex is diagonal. The leaflets are 4-7. It starts from 5 Flowers bloom from September to June, and cones mature from September to October.

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