What kind of tree is pine nuts?

Pine nuts are the seeds of Korean pine.

Korean pine seeds are the main food of many forest animals, such as squirrels, ducks, dragons, black bears, wild boar and other wild animals have to eat a lot of Korean pine seeds. Without Korean pine, many wild animals that feed on pine nuts will be extinct. Therefore, protecting Korean pine is also protecting biodiversity resources and protecting the safety of the biological chain in Xiaoxing 'anling.

Korean pine is an evergreen tree of Pinaceae, with a height of 30 meters and a DBH 1 meter. The bark of young trees is grayish brown, nearly smooth, and the bark of big trees is grayish brown or gray, which is longitudinally split into irregular rectangular scales, and the reddish brown endothelium is exposed after the lobes fall off; The upper part of the trunk is often bifurcated, the branches are nearly flat, and the crown is conical; Annual branches are densely yellow-brown or reddish-brown pilose; Winter buds are reddish brown, oblong, ovoid, with sharp apex, slightly covered by resin, and loosely arranged bud scales.

Living habits of Korean pine

Korean pine has strong photophilia and high requirements for soil moisture, and is not suitable for excessively wet soil and cold climate. It grows best in warm and rainy climate with high relative humidity and deep and fertile acidic brown forest soil with good drainage. Korean pine is a semi-positive tree species with shallow roots, and is often born on wet slopes with good drainage. Young trees are shade-tolerant and sensitive to atmospheric humidity. When the humidity is above 0.7, they grow well, but below 0.5, they grow poorly.

Strong cold tolerance, like slightly acidic soil or neutral soil. Wood is light, soft, fine, straight in texture and strong in corrosion resistance, and is an excellent material for buildings, bridges, sleepers and furniture. Tannin can be extracted from bark and turpentine can be extracted from trunk; Seeds are edible and can be squeezed into juice for food and industry.

The above contents refer to Baidu Encyclopedia-Korean Pine.