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A kind of Chinese fir forest felling method

A technology for Chinese fir plantation and Chinese fir, which is applied in forestry, data processing applications, forecasting, etc., can solve the problems of lack of specific stand analysis, poor flexibility, and low utilization rate, so as to optimize the stand density structure and avoid withering. , the method is simple and easy to implement

Active Publication Date: 2018-07-27
BEIJING FORESTRY UNIVERSITY
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

The current problem is that a certain density control experience is over-promoted, that is, the same density control measures are adopted for Chinese fir plantations under different management objectives and site conditions, without specific analysis of specific forest stands
Neglecting that the density control experience in a certain area will be limited by the site and business objectives, and its promotion has certain regional limitations
Therefore, the traditional experience has shortcomings such as blind operation, low utilization rate, and poor flexibility

Method used

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  • A kind of Chinese fir forest felling method
  • A kind of Chinese fir forest felling method
  • A kind of Chinese fir forest felling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 establishes the estimated harvest density control chart

[0044] 1. Data collection of regional sample plots

[0045] The present invention is constructed based on the eighth national continuous inventory data of Fujian Province released in 2013. The sample plots are arranged systematically, with a layout spacing of 6×6 km and a sample plot area of ​​0.067 hectares. In this paper, the pure Chinese fir plantation plot was selected from all the plots to construct the sparse equation. Each sample plot is divided into sample tree level information and sample plot level information. The information at the sample level includes tree species, diameter at breast height, volume, and spatial location of sample trees; the information at the sample plot level includes topographic factors such as slope, aspect, altitude, and soil type. All plots covered a wide range of stand basal area at breast height, stand density, arithmetic mean stand diameter and mean tree volu...

Embodiment 2

[0067] 1. Plot survey in the Chinese fir forest planning area

[0068] Select the fir forest area with low density of the implementation site as the planned forest stand, adopt random sampling method for the planned forest stand, and set up 4 sample plots, the shape of the sample plot is square, and the sample plot area is 400m 2 . For all trees with a diameter at breast height of not less than 5cm in the standard plot, measure the length of each tree, record the data of tree height, diameter at breast height, and dryness, and collect the density data of the sample plot. The tree height is measured with an ultrasonic altimeter. The tree was observed 3 times, and the average value was obtained. After statistics, it was found that the average square diameter of the stand was 10.36 cm, and the density was 1986 trees / hm 2 .

[0069] 2. Determine the control method

[0070] In the estimated harvest density control chart, determine the intersection position of the density of the ...

Embodiment 3

[0075] 1. Plot investigation

[0076] Select the moderate Chinese fir forest area of ​​the implementation site density as the planned forest stand, and the survey method of the sample plot is the same as that of Example 2, and the average square diameter at breast height of the sample plot is recorded to be 19.31cm, and the density is 2900 plants / hm 2 .

[0077] 2. Determine the control method

[0078] In the estimated harvest density control chart, determine the intersection position of the density of the planned stand and the value of the square mean diameter at breast height, such as figure 2As shown, this point is above the upper limit equation ln(N)=11.935-1.661ln(QMD) of the optimal growth density. In order to promote the growth of fir in this area, the fir in this area is cut down.

[0079] 3. Taking the actual measured value of 19.31cm of Chinese fir in this area as an independent variable, find out in the figure that the square diameter at breast height corresponds...

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Abstract

The invention provides a Chinese fir forest felling and breeding method. According to an investigation of Chinese fir forest, the optimum density of Chinese fir is determined by adopting a harvest forecast density control diagram, the real-time adjustment of Chinese fir man-made forest density is conducted by adopting felling and breeding measures. Therefore, reasonable stand densities are formed at various development stages of the Chinese fir forest, the productivity of Chinese fir individuals are sufficiently guaranteed, and the use of the space is maximized, so that a better operation target is achieved.

Description

technical field [0001] The invention relates to the field of tree management, in particular to a method of applying a density control chart to manage Chinese fir plantations. Background technique [0002] As an important afforestation tree species in the south, fir not only exerts important economic benefits, but also has significance for maintaining the stability of the ecosystem. It has water conservation, accumulation of nutrients, carbon fixation and oxygen release, biodiversity protection, purification of the atmospheric environment, Soil conservation and other value. In view of the large-scale plantation of Chinese fir plantations in southern my country and the important ecological and economic benefits of Chinese fir, the management of Chinese fir plantations will definitely determine the overall success or failure of sustainable forest management in southern my country. [0003] my country's fir plantation management model is relatively extensive, and is generally c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G23/00
CPCA01G23/00G06Q10/04G06Q10/06
Inventor 孟京辉
Owner BEIJING FORESTRY UNIVERSITY
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