1, morphological characteristics of Pinus thunbergii: trees, up to 30 meters, DBH 2 meters; Young skin is dark gray, old gray-black, thick, and earlobe falls off; Branches spreading, crown width conical or umbrella-shaped; Annual branches are light brown and yellow, glabrous; Winter buds are silvery white, cylindrical, oval or cylindrical. Terminal, bud scales lanceolate or elongated. Needle-shaped, with white filiform edges.

2. Morphological characteristics of Pinus pentaphylla: arbor, height 10-30m, DBH 0.6-1.5m; The bark of young trees is light gray and smooth, while the bark of big trees is dark gray, and it splits into scales and falls off; The branches are flat and the crown is conical; Branches flat, conical crown; When young, the annual branches are green, densely yellow-brown pubescent, and then yellow-brown; The winter buds are oval and have no resin.

Second, different origins.

1, black pine origin: native to Japan and the southern coastal areas of South Korea. Introduced and cultivated in Lushun, Dalian, Shandong coastal area, Mengshan area, Wuhan, Nanjing, Shanghai, Hangzhou and other places, the afforestation of Tashan Mountain in eastern Shandong has a history of more than 60 years and is booming. The greening in the northern coastal areas of Zhejiang Province has developed well.

2, five needles pine origin: native to Japan. There are a large number of introduction and cultivation in the major cities in the Yangtze River valley of China and Qingdao, Shandong. Belongs to temperate tree species. I like to be born in a dry place in the hinterland of the mountains. I can withstand shade, avoid humidity and be afraid of heat. The requirements for soil are not strict. Besides alkaline soil, slightly acidic grayish yellow soil is the most suitable.

Extended data:

Black pine likes light, drought, barren, waterlogging and cold. Suitable for growing in warm and humid marine climate zone. It is most suitable for growing in sandy soil, deep soil, loose soil and humus. Because of its resistance to sea fog and sea breeze, it can also grow in saline-alkali land by the sea.

Black pine has strong resistance to pests and diseases, slow growth and long life. Korean pine is evergreen all the year round and has strong resistance to pests and diseases. It is the first choice for greening barren hills and roads.

Baidu Encyclopedia-Japanese five-needle pine

Baidu encyclopedia-black pine