Larix spp. is a deciduous tree of the genus Larix, which is the main forest species of the northeastern and Inner Mongolian forests and the subalpine coniferous forests of North China and Southwest China. It is the main tree of three major coniferous forests in Northeast China. one. Larch is naturally distributed widely. It is a cold temperate and temperate tree species. It is the most cold-tolerant in coniferous species, and the vertical distribution reaches the upper limit of forest distribution.
Larch is a shallow-rooted tree species that is cold-tolerant, hi-light, and drought-tolerant. It has a cool climate, strong adaptability to soil, and has a certain ability to resist water and moisture, but its growth rate is closely related to soil water and fertilizer conditions. Under the conditions of insufficient soil moisture or excessive soil moisture and poor ventilation, larch growth is not good or even death, and soils that are peracid and alkali are not suitable for growth.
Larch usually forms pure forests, sometimes forming mixed forests with fir, spruce and cold-tolerant pine or broad-leaved trees. This is a widely used material in the timber market. Larchs widely distributed in China include: larch (also known as Xing'an larch), Larix principis-rupprechtii, Siberian larch, redwood and its variants.
According to the shape of the cone, the length of the scale and the drooping of the branch, the larch is divided into two groups: the cone of the redwood group is cylindrical or ovate, and the scale is longer than the scale or nearly equal length, and is significantly exposed or exposed. , the lower branch drooping (domestic Tibetan redwoods, Himalayan redwoods, Nujiang redwoods, redwoods, large fruit redwoods, Sichuan redwoods, Taibai redwoods belong to this group).
The larch group is ovoid or oblong, the scales are shorter than the scales, not exposed or exposed, and the branches are not drooping (national larch, yellow larch, Larix principis-rupprechtii, Siberian larch and introduced Japanese larch and European larch belong to this group).
The trunk of the larch is straight and has few knots. The heartwood and the sapwood are significantly different. The material is tough, the structure is slightly thick, and the texture is straight. It is a wood with strong corrosion resistance and mechanical properties in the pine family. It is suitable for construction, electric poles and bridges. , boat, sleepers, eucalyptus, pillars, furniture, appliances and wood fiber industrial materials.
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