A kind of ancient camphor tree age prediction method

A forecasting method and technology of camphor, applied in forecasting, data processing applications, complex mathematical operations, etc., can solve the problem that the ancient tree age forecasting method has not been introduced.

Active Publication Date: 2022-07-01
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no scientific and accurate method for predicting the age of ancient trees in China.

Method used

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  • A kind of ancient camphor tree age prediction method
  • A kind of ancient camphor tree age prediction method
  • A kind of ancient camphor tree age prediction method

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Experimental program
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Embodiment 1

[0029] Example 1 Construction of an ancient camphor tree age prediction model

[0030] figure 1 It is the method flow chart of the camphor tree age prediction of the present invention, and the concrete steps are as follows:

[0031] (1) 32 representative camphor independent trees were selected in the urban area of ​​Sanming, of which 23 were ancient camphor trees, and the tree ages were recorded. 9 trees, choose 3 trees in the stage 350-549a, choose 1 tree in each of 550-750 and 750-900a.

[0032] (2) Obtain the growth index data of camphor. Use a girth ruler to measure the diameter at breast height of camphor; use a tape measure to measure the long crown width and short crown width of camphor, and use the average value as the crown width; at the diameter of camphor, according to the four directions of east, south, west and north , cut a 1cm × 3 cm bark square, measure its thickness with a ruler, backfill it in place, and use the average value of the four directions as the...

Embodiment 2

[0046] The bark thickness at DBH of 271a camphora was 2.17 cm, the average crown width was 26.68 m, and the SOD activity of new leaves was 106.42 U·g. -1 ; PPO activity of new leaves was 29.50U·g -1 ; The sea ratio of the new cascade is 1.26.

[0047] Substitute the above data into the model of the age of the ancient camphor tree: Y = 911.060-269.446* A +9.916* B -9.046* C+0.079*D+499.228* E, the predicted age is calculated to be 262.49a. Among them: Y is the age of the camphor tree; A is the bark thickness at the diameter of the camphor tree, unit cm; B is the average crown width of camphor, the unit is m; C is the SOD activity of the new leaf of camphor, the unit is U g -1 ;D represents the PPO activity of new leaves of camphor, in U·g -1 ; E represents the sea ratio of the new leaves of camphor.

[0048] The relative error between the actual age and the predicted age is 3.14%, and the error rate is less than 5%. The prediction of the age of the ancient camphor tree is ve...

Embodiment 3

[0050] The bark thickness at DBH of 489a camphor was 2.05cm, the average crown width was 24.00m, and the SOD activity of new leaves was 84.67U·g. -1 ; PPO activity of new leaves was 499.91 U·g -1 ; The sea ratio of the new cascade is 1.26.

[0051] Substitute the above data into the model of the age of the ancient camphor tree: Y = 911.060-269.446* A +9.916* B -9.046* C+0.079*D+499.228* E, the predicted age is calculated to be 497.28a. Among them: Y is the age of the camphor tree; A is the bark thickness at the diameter of the camphor tree, unit cm; B is the average crown width of camphor, the unit is m; C is the SOD activity of the new leaf of camphor, the unit is U g -1 ;D represents the PPO activity of new leaves of camphor, in U·g -1 ; E represents the sea ratio of the new leaves of camphor.

[0052] The relative error between the actual age and the predicted age is 1.69%, and the error rate is less than 5%. The prediction of the age of the ancient camphor tree is very ...

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Abstract

The invention belongs to the technical field of ancient tree age prediction, and discloses a method for predicting the age of an ancient camphor tree, which can realize accurate prediction of the age of an ancient tree. The age of the ancient camphor tree was obtained by consulting the data, and the data of 19 indicators in three levels, including the growth of the ancient camphor tree, the anatomical structure of the new leaf and the new leaf physiology, were determined. The stepwise regression analysis method was used to screen out the most significant index responding to the ancient camphor tree age effect. Using these most significant indicators to establish a prediction model for predicting the age of ancient camphor tree, the use of this model can provide help for the protection and rejuvenation of ancient camphor.

Description

technical field [0001] The invention belongs to the technical field of tree age prediction, and relates to an ancient tree age prediction method. Background technique [0002] Ancient trees refer to trees with an age of more than 100 years. They are not only important landscapes of historical sites, witnesses of long history, and symbols of social civilization, but also have a value that cannot be ignored or underestimated in production and scientific research. With the serious aging phenomenon of ancient trees, the aging trend is rising and the loss is huge. Therefore, it is of great significance to accurately determine the age of ancient trees to protect them and slow down their aging. [0003] In general, the age of trees is determined through data records and annual rings. However, ancient trees grow for hundreds of years, even thousands of years, and the information is generally incomplete or even completely absent. The age of the trees is passed down from generation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q10/06G06F17/18
CPCG06Q10/04G06F17/18G06Q10/06393
Inventor 杨志坚冯金玲薛光宇陈来贺
Owner FUJIAN AGRI & FORESTRY UNIV
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