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Method for measuring wood basic density and green density of eucalyptus cloeziana

A large inflorescence eucalyptus, density technology, applied in the determination of basic density and raw wood density, the field of wood basic density and raw wood density measurement, can solve the near-infrared model difficult to large inflorescence eucalyptus wood property determination, high cost, operation Large error and other problems, to achieve the effect of predicting the basic density of wood and the density of raw wood accurately and reliably, saving manpower, material and financial resources, and reducing the damage of forest trees

Inactive Publication Date: 2017-01-11
RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the measurement of basic density and green density index is not only time-consuming and labor-intensive, but also has high cost, strict requirements on sample collection and preparation, and the measurement process is cumbersome, with large operational errors, requiring professional technicians. Therefore, It is only suitable for a small number of professional laboratories, and it is difficult to achieve rapid and high-throughput determination of a large number of samples
However, there is no research on the determination of Eucalyptus macroflorum by using near-infrared spectroscopy
Moreover, due to differences in biological characteristics such as growth and adaptability of tree species, even on the same model of near-infrared scanners, the near-infrared spectral analysis models of different tree species will be different
Therefore, the near-infrared models established by other tree species are difficult to be used for the determination of Eucalyptus macroflorescence

Method used

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  • Method for measuring wood basic density and green density of eucalyptus cloeziana
  • Method for measuring wood basic density and green density of eucalyptus cloeziana
  • Method for measuring wood basic density and green density of eucalyptus cloeziana

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Embodiment 1

[0038] Such as Figure 1~6 Shown, a kind of method of measuring Eucalyptus grandis wood basic density and raw material density comprises the following steps:

[0039] (1) Sawdust sample collection: select 110 live standing trees of Eucalyptus eucalyptus with no defects at the age of 9 to 12 years for numbering, and divide them into part A and part B, of which 92 plants are in part A and 18 plants in part B. The peeled wood sawdust samples were taken from the trunk height of 1.3 meters, and the sawdust samples were taken back to the laboratory for air-drying; the air-drying conditions were 10-20 days in an air-conditioned room at 24°C.

[0040](2) Near-infrared spectrum collection of wood chip samples: the wood chip samples in step (1) are pulverized into wood powder through a sample grinder, and the particle size of wood powder is 60 to 80 mesh; in a room with a constant temperature of 24 ° C, the MPA Fourier transform spectrometer of the German Bruker company is used Scan an...

Embodiment 2

[0052] A method for measuring basic density and green density of eucalyptus macroinflorescence wood, comprising the following steps:

[0053] (1) Sawdust sample sampling; In the 9.5-year-old Eucalyptus macroflora test forest, select 13 strains of living standing trees without defects for numbering, remove the bark of high 5cm and wide 6cm with a knife at the high 1.3m place (diameter at breast height) of the trunk, and use An electric drill with a 1.2cm wide and flat drill bit drills 8-10g of wood chips per sample, the drilling depth does not exceed 4cm, 2-3 holes are drilled, and a small plastic bucket is placed under the drill holes to pick up the wood chips, and then the wood chips are packed Put them into numbered kraft paper envelopes, take them back to the laboratory, and air-dry them for 15 days at 24°C.

[0054] (2) Near-infrared spectrum collection of wood chip samples; the air-dried wood chip samples are pulverized into 60-80 mesh wood powder by a sample grinder, and...

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Abstract

The invention discloses a method for measuring wood basic density and green density of eucalyptus cloeziana. The method includes steps: (1) wood chip sampling; (2) wood sample near-infrared spectrum scanning; (3) standard measurement of wood basic density and green density; (4) spectral preprocessing and model establishment and optimization; (5) model external inspection and selection; (6) model application. Compared with a traditional standard wood density measurement method, the method for measuring the wood basic density and the green density of eucalyptus cloeziana has advantages that damages of standing trees are avoided, defects of long measurement time and proneness to errors in conventional wood density standard measurement are overcome, and simplicity, convenience, quickness, high accuracy, high reliability, low cost and the like are achieved.

Description

technical field [0001] The invention relates to the field of measuring the basic density and raw material density of wood, in particular to a method for measuring the basic density and green material density of Eucalyptus grandis. Background technique [0002] Eucalyptus cloeziana, also known as Eucalyptus cloeziana, is the only species of Eucalyptus in the subgenus Eucalyptus genus Queensland. It grows rapidly, has obvious dominance at the top, straight and round trunk, good natural pruning, hard and durable wood, and straight texture , uniform structure, is an important solid wood species, suitable for the cultivation of large-diameter timber, widely used in mine pillars, construction, furniture and sleepers, etc. Its wood basic density and green wood density, the basic density is the wood basic density, and the green wood density is the green wood density, the properties significantly affect the wood quality and the operating benefits of the plantation, and are one of the...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N1/28
CPCG01N21/359G01N1/286
Inventor 翁启杰李昌荣甘四明李发根周长品李梅陈升侃
Owner RES INST OF TROPICAL FORESTRY CHINESE ACAD OF FORESTRY
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