Alias: Five Needle Pine, Japanese Five Hu Song, Five Needle Pine.

Pinus of Pinaceae.

Latin scientific name: Pinus parviflora. Et Zucc。

Edit the morphological characteristics of this section of the tree, the origin is as high as 25 meters, DBH 1 meter; 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; The annual branches are green when they are young, then yellow-brown, and densely yellowish-pilose; Winter buds are ovoid and have no resin. The needles are a bundle of 5 needles, slightly curved, 3.5-5.5 cm long, less than 65438 0 mm in diameter, with fine serrations on the edge, dark green on the back, no stomatal lines, and 3-6 gray-white stomatal lines on each side of the ventral surface; The transverse section is triangular, with a single layer of subcutaneous cells, two marginal resin channels on the back and 1 middle or no resin channels on the ventral surface; Leaf sheaths fall off early. The cones are ovoid or ovoid-elliptic, almost sessile, and the seed scales are open at maturity, with a length of 4-7.5 cm and a diameter of 3.5-4.5 cm; The middle seed scale is obovate rhomboid or oblong obovate, 2-3cm long and1.8-2cm wide. The scale shield is light brown or dark gray brown, nearly rhombic, round at the top, concave at the scale umbilicus, slightly folded in, thin at the edge, bent outward at both sides, and wide wedge at the bottom. The seeds are irregularly obovoid, nearly brown, with black markings, 8 8- 10/0mm long, 7mm in diameter, 6-8mm in wing width and1.8-2cm long.

Edit the trees with active growth habits in this section, but they are more tolerant to shade than Pinus densiflora and Pinus densiflora. I like to grow in places with deep soil, good drainage and suitable humidity, but I can't grow well in wet places. Although it has strong resistance to sea breeze, it is not suitable for sand. The growth rate is slow. Not resistant to transplantation, no matter how big or small the seedlings are, they need to bring soil balls when transplanting. Plastic resistance.

Edit this paragraph and propagate by sowing, grafting or cutting. However, because seeds are not easy to collect, grafting propagation is generally used. The 1000-grain weight is about 120g, and the sowing method is the same as that of common Pinus plants. When grafting propagation, cutting method is often used, and abdominal grafting can also be used. Rootstock adopts 3-year-old seedlings of Pinus thunbergii. If Pinus densiflora is used as the rootstock, the growth will be poor.

Edit the key points of cultivation in this section [1] Pots are changed in February and March every year to remove some old soil. Care should be taken not to damage branches and leaves during operation to prevent resin from flowing out. Water during the growing period to prevent it from being too wet or too dry. Apply fertilizer 1 time every month from February to March in spring or from August to June in autumn, and thin fertilizer is better. In addition to the hot sun, we need plenty of sunshine. April-May plastic pruning, mainly light pruning.

Choose fertile, moist and well-drained sandy loam for cultivation. Transplanting should bring soil balls and water them in time. Pay attention to water conservation in dry season and drainage in rainy season to prevent waterlogging. However, if left to grow naturally, the tree is more common, and it is difficult to give full play to its beautiful needles, so it usually needs special renovation.

Leaf blight and stem blight often occur in pest control in this section, and 70% mancozeb wettable powder is sprayed with 600 times solution. Insects include scale insects, red spiders and pine caterpillars, and 25% buprofezin EC+1000 times and 0.5% avermectin EC+ 1500 times can be sprayed.