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Spruce Profile
Add time:2016-08-26 Browse the number: 804
China is a country Picea most plants, a total of 16 kinds of 9 variants, located in the northeast, up to the north, northwest and southwest regions and Taiwan mountain and subalpine areas, especially in the Hengduan Mountains region species, rich in timber volume. Picea plant earliest fossils found in the western United States and Japan in the late Cretaceous. Late Tertiary to Quaternary Pleistocene OF SPRUCE due to the impact of falling global temperatures, so spruce spread from high latitudes and high altitudes to low altitudes and low latitudes, the type of increase. Subsequently temperatures rise and retreat of glaciers, distribution and gradually reduce, multiply since the formation of the modern distribution pattern. We discovered the spruce pollen and cones in the Late Pleistocene south China and the Qinling Mountains in southeastern plains and low mountains southwest region of. Spruce strong negative resistant species, like the cold and the cold wet weather in the high-latitude boreal, boreal to warm temperate and subtropical low latitude subalpine and alpine shady, semi-shady valleys and form pure forest, or the composition of coniferous forest or mixed conifer and fir, larch, hemlock, and some like the cold weather pine and broadleaf. Spruce tall, straight trunk, small section, slightly soft material, texture straight, uniform, fine structure, easy processing, has a good resonance performance. For buildings, aircraft, musical instruments (piano, violin), journey, furniture, appliances, boxes, plywood and veneer, and planing wood fiber raw materials such as timber industry. Feature of many spruce trees have drooping branches and whole trees are layered pieces. Standing upright needle leaves spiral around the stem length of 2-3 cm. Ye Chun from the Director out if off, Chun will be preserved. Wooden dangling cones, pebbles form a cylindrical, inwardly curved bracts when mature cone, these bracts will open to allow the seeds to fall off. Tall spruce trees of coniferous species, about 45 meters high, diameter l meters, the crown is narrowly conical, bark gray, scaly shedding large branches spreading, branchlets hairy, annual branches brown. Leaf-shaped rectangular strip, bend, powdery green, apex acute, surrounded by stomatal lines, 1 to 2 cm long leaves, branches, leaves spirally arranged. Flowers unisexual, monoecious, May flowering, fruit 10 Moon mature, with strong cyclical phenomenon, usually 4--5 appeared once harvest, seed quality lean year of poor germination rate. Seed weight 3.6-4.6 grams per kilogram of seed 250000-350000 grain, the germination rate of 20-45%. Seed sacks ordinary dry storage, 2--3 years after the germination rate decreased 8-15%, low temperature sealing dry storage, the germination rate is only 5 years decreased by 5%. An article: Spruce use
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