The latest Culture method of Pinus koraiensis Bonsai
Red pine, also known as Japanese red pine, ash red pine, short-leaf red pine, etc., is a tall tree of Pinus pinaceae, with high ornamental value, suitable for solitary planting on both sides of the entrance or on the lawn, and more with red maple and feather maple. It is also a good wood for stump bonsai. Let's take a look at the breeding method of red pine bonsai.
Ecological habits of Pinus koraiensis
Pinus koraiensis is a deep-rooted light-loving tree species, strong wind resistance, born in temperate coastal mountains and plains, annual rainfall of more than 800mm, than Pinus massoniana cold tolerance can tolerate barren soil, can be born in granite, gneiss and sandstone weathered neutral soil or acid soil (pH5~6) mountain, not saline-alkali soil, poor growth in poorly aerated heavy clay loam.
Cultivated varieties of Pinus koraiensis
1. Pinus koraiensis: the trunk is short, the branches are clustered from the base and extend upward to form a spherical crown, with short and dense leaves, often used as bonsai cultivation for ornamental use.
2. Umbrella-shaped Pinus koraiensis: large tufted shrubs, up to 4 meters high, with trunks mostly clustered upward from the base to form an umbrella-shaped crown. Cultivated in Nanjing, Suzhou, Shanghai, Hangzhou and other places in China, they are beautiful ornamental trees with prosperous growth.
Propagation methods of Pinus koraiensis
1. Sowing: the seeds were collected in October, the cones were exposed to the sun for several days, often turned, the fruit scales were cracked, the seeds came out, cleaned and dried, sowed, sowed or sowed in 2-3 months. After sowing, it was sifted with yellow soil or scorched mud ash, covered with straw to keep the soil moist, and the seedlings were unearthed in mid-April and uncovered in time. Special control of stunting disease and other diseases and insect pests should be made before and after sowing, and afforestation can be planted in the next spring.
2. Grafting: Pinus koraiensis was grafted with black pine as rootstock, and strong 1-year-old branches were selected for scion. Abdominal grafting was carried out from mid-late February to early March, and then the soil was picked up to the top of the scion, and water was sprayed slightly to prevent the scion from withering. After survival, the branches and leaves of the rootstock can be gradually trimmed off, and all the branches and leaves of the rootstock can be cut off in mid-late October, but some of them can also be left for the following year. Pinus koraiensis can be grafted with high height, which grows fast and forms early, but 5 ~ 6-year-old rootstocks should be selected.
Culture method of Pinus koraiensis
1, watering: red pine likes to dry and avoid stagnant water, watering should not be excessive, only when it is dry, and then poured thoroughly. Proper water control during the growing period can make the branches thick and short, the needles short, and increase the ornamental value. When it is hot in summer, foliar water can be sprayed frequently, which is beneficial to growth.
2. Fertilization: Pinus koraiensis can tolerate barren, lack of fertilizer in soil, can grow normally, and promote short stem, dense branches and short leaves. However, the proper application of thin and rotten cake fertilizer and water during the growing period is beneficial to robust growth and increase the ability of resistance to diseases and insect pests.
3. Pruning: Pinus koraiensis bonsai should be pruned properly in order to maintain its beautiful and quaint tree shape. the pruning is mainly to pick buds during the growing period, 3 to 4 evenly every year. When the new buds elongate but have not yet produced needles, about 1 / 2 of each top bud can be removed. If you do not need bonsai to grow branches, you can pick all the terminal buds. The branches that affect the appearance of the tree can be pruned during the dormant period.
4. Turning the basin: the bonsai of Pinus koraiensis is usually turned once every 3 to 5 years, and it is suitable for February to March. When turning the basin, it is necessary to keep the original basin soil intact, remove 1 inch and 2 old soil, cut off overgrown roots, as well as withered and rotten roots, and trim some unnecessary branches and leaves to maintain the balance between the upper and lower parts of the basin soil. If the capacity of the original basin is not enough, it can be replaced with a slightly larger new basin, and the planting method is the same as that of the upper basin.
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