Jinsong

Jinsong

Jinsong (scientific name: sciadopitysverticillata (Thunb.) Sieb.etZucc . it is a tree of Pinus family and Pinus genus. It is 40 meters high in the original area. Its branches are nearly whorled and extend horizontally. Its crown is tower shaped. It splits into strips and falls off. The leaves are scaly, triangular, green at the base, membranous and reddish brown at the upper part, blunt at the apex, bright green above and light green below, with a yellowish longitudinal groove in the center. The male cones are ovoid, short stalked, and the stamens are wide rectangular. Cones ovate oblong, seed scales broadly cuneate or fan-shaped, apex broadly rounded, margin thin, outward involute, seeds flat, oblong or elliptic.

It is native to Japan. It grows slowly in Qingdao, Lushan, Nanjing, Shanghai, Hangzhou and Wuhan. The shade tree likes fertile land. In addition to seed propagation, cuttings or rooting can also be used.

Pinus tabulaeformis is a kind of garden tree; its wood can be used for construction, bridge pile, shipbuilding, etc.

(general picture, reference source: Chinese herbarium)

morphological character

Arbor, 40 m high in origin, 3 m DBH; branches nearly whorled, horizontally extended, crown pointed tower shaped; bark reddish brown or gray uncolored, split into strips and fall off. Scaly leaves triangular, exfoliative, 3-6 mm long, base green, upper membranous, reddish brown, apex obtuse, brown in the second year; connate leaves strip, 5-15 cm long, 2.5-3 mm wide, margin thick, apex obtuse, slightly concave, bright green above, a deep longitudinal groove in the center, light green below, a yellowish longitudinal groove in the center, a white groove on both sides Stomatal zone.

Male cones ovoid, about 1.2 cm long, short stemmed, stamens broadly oblong. Cones ovate oblong, short stemmed, 6-10 cm long, 3.5-5 cm in diameter; seed scales broadly cuneate or fan-shaped, 1.2-2 cm wide, apex broadly rounded, margin thin, rolled outward, ventral and abaxial covering parts with fine hairs; apex of bract scales separated, part triangular and retroflexed backward; seeds flat, oblong or elliptic, wings 8-12 mm long, 8 mm wide.

Habitat of producing area

It is native to Japan. It grows slowly in Qingdao, Lushan, Nanjing, Shanghai, Hangzhou and Wuhan. The shade tree likes fertile land.

Methods of reproduction

Seed treatment: before sowing, sterilize the seeds with 0.5% potassium permanganate solution for 30 minutes, then soak the seeds in warm water with initial temperature of 40 ℃ for 24 hours, and mix the seeds with twice the volume of sterilized river sand for germination treatment. Because the seeds of Pinus taeda are expensive, the amount of seedlings is generally less. The specific method of accelerating germination is as follows: lay 10 cm thick wet sand layer on the bottom of tile flowerpot or small wooden box, spread the mixture of seed and sand on the wet sand layer, cover 5-10 cm thick wet sand on the top, cover it with plastic film, put it in the leeward and sunny place during the day, move it indoors at night, and place it in the greenhouse or plastic greenhouse if possible. The wet sand used in the process of germination was mixed with 0.5% potassium permanganate solution to form the shape of "holding sand to form a ball without dripping water, loosening sand to disperse". Check the temperature and humidity during germination and spray water in time. When most seeds germinate and turn white, they can be sown.

Preparation of nutrient soil:

Mix 100 kg of nursery soil, 25 kg of rotten circle fertilizer, 1 kg of compound fertilizer, 1 kg of superphosphate, 1 kg of ferrous sulfate and 0.05 kg of 5% carbendazim wettable powder, and mix them evenly.

sow:

According to the number of seeds, the seedlings can be raised in containers or sown in tile flowerpots. The best sowing season is early and middle March.

Pot sowing:

Put the prepared nutrient soil into the basin, and irrigate it with 0.5% potassium permanganate solution for disinfection. After the nutrient soil is loose, the germinated seeds are sown according to the grain spacing of 5cm and covered with nutrient soil of about 1cm. According to the circumference of the basin mouth, make a half spherical plastic film cover. The height of the center of the cover is about 20 cm, and cover the basin mouth. In the daytime, it should be placed in the leeward and sunny place, and in the evening, it should be moved indoors for thermal insulation.

Container seedling:

Put the prepared nutrient soil into a plastic film container bag with a diameter of 8 cm and a height of 12 cm. The container bags are closely arranged in the nursery beds, and the gaps between the bags are filled with nutrient soil. 0.5% potassium permanganate solution is sprayed through. After the soil is loose, the germinated seeds are seeded in a bag with one bag and one seed, which is covered with nutrient soil about 1cm thick and covered with plastic film arch shed.

cultivation techniques

According to the soil condition, water should be sprayed in time to keep the humidity, and the temperature should be adjusted in time according to the air temperature to control the temperature in the range of 20-30 ℃. < / Li > < li > thin fertilizer should be sprayed once a month at seedling stage, and water should be sprayed in time after fertilization. In late August, fertilizer and water were controlled, and 800 times potassium dihydrogen phosphate was sprayed once to promote the lignification of seedlings. < / Li > < li > avoid shade in high temperature season and prevent cold in winter. Potted seedlings can be moved indoors or in greenhouses. The container seedlings were irrigated with frozen water once before freezing, in order to make the seedlings survive the winter safely.

Pest control

During the tending management, 500 times 25% carbendazim solution should be sprayed every 2-3 days to prevent seedling Damping off. After spraying, water should be sprayed in time to prevent drug damage.

Main value

Pinus tabulaeformis is a kind of garden tree; its wood can be used for construction, bridge pile, shipbuilding, etc.

Chinese PinYin : Jin Song