oak, also known as oak or oak. A general term for FAGACEAE plants, including species of Quercus, Cyclobalanopsis, and Gramineae, usually referring to Quercus plants, not a specific tree species. There are 615 species of Quercus, of which 45 are from Subgenus Quercus and 188 are Subgenus Quercus Cyclobalanopsis. Its fruit is called acorn, and its wood is generally called oak.
Oak is the largest flowering plant in the world; Life span is very long, it has a high life span of 4 years.
deciduous or evergreen trees, up to 25 to 3 meters or more. The bark is dark grayish brown and slightly smooth. Branchlets brown and glabrous.
The winter buds are oval, 3-5 mm long, hairless, with dark brown bud scales, and most of them are covered with tiles. The leaves are oval or oval, 1-2 cm long and 7-1 cm wide, tapering at the top and wedge-shaped at the base, with 5-7 pinnate parts on each side of the leaf margin, finely toothed lobes, dark green leaves, light green back and hairless or tufted hairs in the vein axils; Petiole 2.5 to 5 cm long, glabrous when old.
the male inflorescence and leaves are open at the same time, and several are clustered; Female flowers are solitary or 2 to 3 flowers are born on the total stalk about 1 cm long.
The shell bucket is cup-shaped, covering 1/4 to 1/3 of nuts, with a diameter of 1.5 to 1.8 cm and a height of 1 to 1.2 cm; Bracteoles triangular, closely imbricate, glabrous and shiny. Nuts are oblong, about 1.5 cm in diameter, 2 to 2.5 cm in height, light brown, covered with thin fluff, and then gradually shed; The top is round and has a small column seat; Fruit navel flat or slightly concave. The flowering period is from April to May, and the fruiting period is September of the following year. Resistant to water and humidity. Nuts contain 46% starch, 1% tannin, 12% oil and 7% protein.
Growing environment editing voice
It has strong resistance to stress, dryness, high temperature and moisture, frost and urban environmental pollution, strong wind resistance, and likes well-drained soil, but it can also grow in sticky soil. Oak likes sandy loam or slightly acidic soil with good drainage, which is resistant to environmental pollution and has strong adaptability to barren, arid, acidic or alkaline soil. Oak grows at a moderate speed, growing 6 cm high every year on wet and well-drained soil.
Distribution range
It is distributed in Xiong Yue, Liaoning, Tai 'an, Qingdao, mountainous areas in western Hebei, mountainous areas in western Hubei (Enshi and Changyang) and Henan. Ankang has cultivation.
main value
wood: there are many honeycomb structures inside, and the interior of the honeycomb is full of air, so the elasticity of oak is very good. Oak itself is very wear-resistant, and many cylinder pads of engines are made of oak.
in addition, oak is moisture-proof and moth-proof, which can ensure that wine will not pass away with the years in a dark and humid cellar. This pure natural material has no harm to human body, so it has been widely used in the production of wine and champagne stoppers for more than 1 years.
The fruit is a nut, with one end furry and the other bare, which is food for animals such as squirrels.