Cultivation method for non-node wood of Chinese fir

A cultivation method, the technology of Chinese fir, which is applied in the field of Chinese fir without knots, can solve problems such as lack of determination of the strength of Chinese fir pruning, unsatisfactory timber yield and quality, difficulty in producing fast and mass-produced no-knotted Chinese fir dry wood, etc. To achieve the effect of ensuring porosity, ensuring no knots, and avoiding pruning

Inactive Publication Date: 2018-10-16
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although my country's Chinese fir cultivation technology is relatively mature, the cultivation technology of Chinese fir, which has the goal of being a high-value decorative material, needs to be improved. The output and quality of wood cannot meet the needs of economic construction and forestry production. The determination of the pruning strength lacks a reasonable prior basis, and it is difficult to quickly and massively produce knotless Chinese fir dry wood by relying solely on empirical pruning techniques.

Method used

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  • Cultivation method for non-node wood of Chinese fir

Examples

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Effect test

Embodiment 1

[0044] A method for cultivating Chinese fir without knots, comprising the following steps:

[0045]S1, select afforestation land in mountainous areas with fertile soil for afforestation, clear the afforestation land, and reserve;

[0046] The methods of clearing the afforestation land are as follows: ① Ground slope > 30 degrees, it is not suitable to cultivate Chinese fir forests to cultivate good wood without knots; ); ③ ground slope <20 degrees, comprehensive cleaning, conventional alchemy.

[0047] S2, soil preparation

[0048] If 20 degrees ≤ ground slope ≤ 30 degrees, pit-type soil preparation, the length of the pits is 70cm, the width is 70cm, and the depth is 50cm; the row spacing of the pits is 2.0m, and the distance between adjacent pits in each row is 1.5m;

[0049] If the ground slope is less than 20 degrees, the soil should be fully prepared with a depth of 40cm.

[0050] S3, Afforestation and young forest tending

[0051] Seedling selection: excellent clone se...

Embodiment 2

[0064] A method for cultivating Chinese fir without knots, comprising the following steps:

[0065] The steps of S1-S3 are the same as in Example 1.

[0066] S4, pruning

[0067] In the 3rd year after afforestation (that is, the age of the tree is 3 years), the first pruning is carried out, and the number of pruned Chinese firs accounts for 50% of the total number of experimental plants; the intensity of pruning is determined by the ANN model; when the tree is 5 years old, the second pruning The branches were fully pruned, and the pruning intensity was determined by the ANN model; when the tree was 10 years old, the third pruning was carried out, and the pruning intensity was determined by the ANN model; when the tree was 15 years old, the pruning was completed.

[0068] Described ANN model is determined according to the following steps: collect the age (Age), site index (SI), diameter at breast height (DBH), tree height (H) data of Chinese fir to be pruned; The data is an i...

Embodiment 3

[0076] A method for cultivating Chinese fir without knots, comprising the following steps:

[0077] The steps of S1-S2 are the same as in Example 1.

[0078] S3, Afforestation and young forest tending

[0079] Seedling selection: excellent clone seedlings, one-year-old first-grade seedlings; ground diameter ≥ 0.5cm, seedling height ≥ 30cm, root system length ≥ 20cm;

[0080] If 20 degrees ≤ ground slope ≤ 30 degrees, plant Chinese fir in each hole; if the ground slope is < 20 degrees, afforestation is carried out with a row spacing of 2.0 meters and a plant spacing of 1.5 meters; in the first year after afforestation, in March to April During this period, peanuts were planted in the middle of the Chinese fir trees in adjacent rows, and they were tended by knives in September of the same year; then young forest tending was carried out.

[0081] It should be noted that, according to the actual needs, the young forests with grafting and replacement of crowns are used: the crown...

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Abstract

The invention belongs to the technical field of cultivation for non-node wood of Chinese fir and particularly relates to a cultivation method for non-node wood of Chinese fir. The method comprises thefollowing steps that afforestation land is selected and cleaned; soil preparation is conducted, wherein hole-type soil preparation or full-reclamation soil preparation is adopted, and afforestation is conducted; afforestation and young forest tending are conducted, and soybeans or peanuts are interplanted; pruning is completed within 3-15 years, wherein the pruning strength is determined by an ANN model; within 8-15 years, intermediate cutting work is completed. According to the cultivation method, by adopting the pruning mode, dead nodes do not remain, in the process of young forest tending,pruned branches, removed weeds and removed miscellaneous shrubs are used for covering the periphery of the bottom of each tree, and the water and fertilizer retention function is achieved; by applying a growth accelerant, the growth of trunks can be stimulated, and good-quality and non-node dry wood of Chinese fir is cultivated; the average annual increase amount of the tree height can reach 1.28m, the average annual increase amount of the diameter at breast height can reach 2.38 cm, and the economic benefit is obviously higher than that of a breeding and large-diameter wood cultivation method for common artificial forests of Chinese fir.

Description

technical field [0001] The invention belongs to the technical field of cultivating fir without knots, in particular to a method for cultivating fir without knots. Background technique [0002] With the continuous increase of people's demand for timber, cultivating artificial forests has been paid more and more attention. The directional cultivation of high-yield, high-quality, and stable plantations has become the general trend of the development of plantation timber forests in the world. A large number of beneficial practices have been carried out internationally, and various cultivation modes have been eliminated. Chinese fir (Cunninghamia lanceolata) is an evergreen tree of the family Firaceae, and it is a fast-growing conifer species unique to southern my country. It is characterized by fast growth, high yield, straight and smooth dry shape, straight wood texture, light and tough material, moderate strength, fragrant smell, insect resistance and corrosion resistance, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G17/00A01G23/00A01G7/06A01N65/44A01N61/00A01P21/00
CPCA01G7/06A01G17/005A01G23/00A01N61/00A01N65/00A01N65/44Y02P60/40Y02A40/22
Inventor 邓湘雯朱宁华黄雅奇李颜斐王晨阳魏小丛温红芳张斌
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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