How long does it take to grow a pine tree? Introduction to pine trees

pine tree

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Our world consists of too many beautiful trees and plants. Lush green trees and plants paly a very important role in the beauty of our world and pine tree is one of the most beautiful trees in the world. How long does it take to grow a pine tree? Or how long does it take a pine tree to grow? There are many questions which we think about pine tree.  Pinus strobus is the white pine tree scientific name or pine tree common name.

There are nearly 80 species of pine trees in the world. Not only are there many types, but also widely distributed, such as Pinus tabulaeformis, Pinus sylvestris, Pinus sylvestris and Pinus sylvestris. In addition, ovarian pine and Lavis pine come in four-needle or five-needle bundles. There are many types of pine trees in a bunch of five needles, and they are widely distributed.  

The pine tree has round branches with long internodes. The branchlets are relatively thin, straight or slightly curved downwards, and the needles are elongated into bunches. The canopy of the tree does not look compact, and the word “pine” is the vivid description of the characteristics of the tree canopy. Therefore, “pine” is a type of canopy pine. The pine tree is strong and has a long life span.

In this article we will discuss in details about pine tree growth, pine tree reproduction, types of pine trees and how long does it take a pine tree to grow?

Where do pine trees grow?

How long does it take a pine tree to grow? The answer is simple. A normal pine tree takes up to 9 years for complete growth and we can grow it in cool temperature and suitable location. They have covered a large part of the world.

Also Read: Unusual things to do in tempe

Some common characteristics of pine trees

Usually it takes 8 to 9 years for proper growth of a pine tree. It contains leaves, flowers and branches. You can find pine tree garden, pine tree vector, pine tree lodge and pine tree garden seeds very easily. The following are some common characteristic of a pine tree.

Branches of a pine tree

Mature branches are 45 meters tall and 1.5 meters in diameter at breast height; the bark is reddish-brown, and the lower part is grayish brown, cracked into irregular scaly pieces; the branches are spread out flat or obliquely, and the crown is wide and tower-shaped or umbrella-shaped. The branches grow once a year.

But in southern Guangdong, it usually grows in two rounds, light yellow-brown, no white powder, rare white powder, glabrous; winter buds are egg-shaped cylindrical or cylindrical, brown, pointed at the top, and the edges of the buds are filiform, and the apex is pointed or acuminate. Long pointed, slightly recurved.

flowers of pine tree

Hermaphrodite, cone flower is unisexual; male cone flower solitary new branch lower bract axils, most clusters, many stamens, anther 2, medicinal chamber longitudinally split, pollen has two well-developed air sacs, air sacs and body contact surface are small, The boundary is obvious, and there are generally significant margins; there are 1-4 female cones born near the top of the new shoots, with many pearl scales and bract scales.

The ventral base of each pearl scale bears two anatrophic ovules, which are pollinated in the same year. It will rapidly grow into cones in the second year. Cones mature in 2 years. When mature, the seed scales are open, sparsely open, ovoid, long ovoid, nearly round or cylindrical, erect or pendulous; seed scales are woody, persistent, and the exposed part is usually thick and scaly.

Shield, with obvious transverse ridges or no transverse ridges, the apex or center of the scutellum has many tumor-like raised or dimpled squamous umbilicuses, thorns or no thorns, with 2 species of developing seed scales; upper part of seed with upper wings and cotyledons 3~18, unearthed during germination.

Seeds of pine tree

pine seed some species earlier, 5-6 years a small amount of seed can be significantly increased (Pinus massoniana, pine, Pinus, etc.) 15 to 20 years; Fructify some late, as in the Natural Conditions Pinus Under the conditions of plantation, it will not start to bear fruit until 80 to 140 years (but under the condition of plantation, it will start to bear fruit in 15 to 20 years). Most pine trees have intermittent fruit and harvest every 2 to 3 years or longer. The male cones of pine are located at the base of the new shoots, and the female cones are mostly found at the axial ends of the main branches. The ripening of cones takes a long time. Through pine tree garden seeds, you can have a pine tree garden easily.

The leaf

needles are 2 needles per bunch, 3 thin needles per bunch, 12-20 cm long, soft, slightly twisted, with stomata lines on both sides, and fine serrations on the edges; the subcutaneous cell monotype on the transverse section, the first layer is continuous, The second layer is made up of individual cells intermittently arranged. There are about 4-8 resin channels, which grow on the back side or 2 sides on the ventral surface.

The leaf sheaths are brown at first, and then become gray-black and persist. Male cones are light reddish brown, cylindrical, curved, 1-1.5 cm long, clustered in the lower bract axils of new branches, spike-like, 6-15 cm long; female cones are solitary or 2-4 clustered on new branches Near the top, lavender red, annual small cones round or ovoid, about 2 cm in diameter, brown or purple-brown, the scales of the upper bead scales have short spines upright, and the scales of the lower bead scales are flat and blunt thorn. 

Cone ovoid or conical ovoid, 4-7 cm long, 2.5-4 cm in diameter, short stalks, drooping, green before maturity, chestnut brown when ripe, falling off one after another; middle seed scales are nearly rectangular and obovate , Or nearly rectangular, about 3 cm long; scale shield rhombus, slightly raised or flat, slightly obvious transverse ridges, scale umbilicus slightly concave, no thorns, born in a dry environment often have very short thorns; seeds long ovoid, 4-6 mm long, 2-2.7 cm long wing; 5-8 cotyledons; 1.2-2.4 cm long; primary leaves are strip-shaped, 2.5-3.6 cm long, with sparse spines on the edge of the leaf.

Pine is a collective term for Pinus, evergreen coniferous trees, monoecious. The branches are whorled, with one or several nodes each year, with prominent winter buds and many bud scales. Bud scales, scale leaves (primary leaves), stamens, bract scales, pearl scales and seed scales are arranged spirally. The scale leaves are solitary, linear and green when they are young, and then gradually degenerate into brown, membranous bracts, with needles (secondary leaves) drawn out in their axils; needles of 2, 3, or 5 needles, born in underdeveloped On short branches, the base of each needle leaf is surrounded by a membranous leaf sheath.

Common habits of pine trees

The following are some habits of pine trees which you must know

Climatic conditions

Due to the differences in the geographical distribution of origin, among the pine trees native to China, Pinus sylvestris, Pinus sylvestris, and Pinus sylvestris from Xinjiang are the most cold-resistant and require the lowest heat. Korean pine also has low calorie requirements. Red pine, Chinese pine, white bark pine, Huashan pine, alpine pine, Huangshan pine, and Bashan pine are tree species in warm temperate and subtropical high-altitude areas, and require moderate heat. 

Masson pine, Yunnan pine, Qiao pine and Simao pine are distributed more south, requiring higher heat. South Asian pine is a tropical pine tree that has the highest requirements for heat. 

The requirements for wetting conditions are generally higher for five-needle pine than for two-needle pine, but it also varies from species to species. For example, Korean pine and Huashan pine, which are both five-needle pine, require more moist conditions than the latter; Red pine and masson pine, both of which are two-needle pine, have higher requirements for wet conditions than Pinus tabulaeformis and Yunnan pine. This is related to the substitution phenomenon that occurs with longitude in geographical distribution.

Soil requirements

Pine trees can grow on a variety of different soils. Because the needles have low ash content, they can tolerate poor soil, but they have high productivity when planted on loose and fertile soil. Pine trees in humid areas are mostly suitable for acid soils. Some pine trees, such as white pine and Chinese pine, can adapt to soils with high calcium content and high pH. The roots of pine trees have symbiosis of mycorrhizal fungi. The mycelium, which is mainly ectomycorrhiza, forms a sheath that surrounds the short lateral roots, which facilitates the absorption of water and nutrients by the root system. Therefore, the induction of mycorrhizal development is crucial to the success or failure of some pine afforestation. Most pine trees cannot grow on saline soil and therefore cannot grow near the seashore. 
Negative tolerance

Most pine trees, especially the two-needle pine, are light-loving species and have weak tolerance to negative effects. Its appearance is characterized by a sparse crown and high natural pruning; physiologically it has a low compensation point; it is mostly a pioneer tree species in terms of growth characteristics. When virgin forests are destroyed or fired, they can easily develop and occupy bare spaces. 

The characteristics of Yin and longevity finally restored its dominant position. In addition to the replacement of red pine, aspen, and birch, there is also the replacement of Mongolian oak (tussah) and red pine.

Drought resistance

Pine trees have a xeromorphic structure: narrow leaves, well-developed stratum corneum, small surface area to volume ratio, sunken stomata, and fully developed thick-walled tissue. Physiologically, they are more tolerant of lack of water without being harmed than the mesozoic broad-leaved species. Ecologically, pine trees are xerophytes. All kinds of pine trees distributed in different climatic regions can mostly grow in arid habitats with stony and shallow soil. Generally speaking, two-needle pine has stronger drought resistance than five-needle pine. Excessive soil moisture is bad for the growth of pine trees.

Growth and development of pine trees
The growth process of pine trees varies from species to species. Pinus tabulaeformis, Pinus massoniana, and Yunnan pine grow faster in the early stage, but reach the maturity stage later; before they are 5 years old, their tree height and diameter grow slowly, and 5-20 years is the peak growth period. The diameter at breast height of the natural forest Korean pine grows slowly before 50 years of life, 50-100 years is the period of vigorous growth at breast height, after which it can maintain a high speed, and it will not significantly decrease after 200 years; the period of vigorous growth of tree height is about 100 years.

Around 300 years. In plantations, the early growth of Korean pine is significantly accelerated. Generally, the diameter at breast height and the height of the tree grow slowly in the first 10 years, and the growth period of 10 to 30 years will reach the vigorous period. The growth process of South Asian pine is similar to other tropical pine trees.

It is 4 years old after germination. The stem height of the seedlings grows very slowly, but the thick growth is fast. The stems are like carrots, and the needles are as dense as grasses. The top buds are hidden. In the foliage; after the tussock-like stage, the height growth suddenly accelerates, and it can grow 80 to 130 cm per year. Yunnan pine also has a clump grass-like stage when it is young.

Final words

There are different types of pine trees available in the world with different characteristics. Pine tree common name is pinus and can be found in areas of cool temperature easily. We can grow pine tree easily by following some rules. It takes 9 years to grow completely. There are pine tree gardens, pine tree apple orchard, pine tree apartments and many more. So if you are thinking about

How long does it take to grow a pine tree? The answer is very simple which 8 to 9 years is almost. If you want to grow a pine tree, you must have knowledge about pine tree.

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