Method for selecting natural secondary forest intermediate cutting object woods

An object and secondary technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large differences in tending effects and large impact on the health management effect of forest ecosystems, and improve stand space. The structure and the ecological environment in the forest, improve the stand quality and landscape, the effect is obvious

Inactive Publication Date: 2014-02-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

Different forestry workers choose different tending objects, and the tending effects vary greatly, which has a great impact on the healthy management of forest ecosystems

Method used

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  • Method for selecting natural secondary forest intermediate cutting object woods
  • Method for selecting natural secondary forest intermediate cutting object woods
  • Method for selecting natural secondary forest intermediate cutting object woods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] 1. Define thinning index

[0028] The tree thinning index is defined as the probability that a single tree in a forest stand is determined as the object of tending and thinning. The thinning index value is [0, 1]. The greater the thinning index value of a certain tree in the stand, the higher the probability that the tree will be determined as the object of tending and thinning, and the greater the possibility of becoming the object of tending and thinning, that is, according to the tending intensity and the thinning index of each tree in the stand to determine the tending object.

[0029] 2. Index selection for constructing thinning index

[0030] Combined with the characteristics of secondary forests and management objectives, through questionnaire survey, six quantitative indicators that affect the probability of trees in secondary forests being identified as tending and thinning objects were selected: degree of freedom, degree of mixing, health index, target tree s...

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Abstract

The invention discloses a method for selecting secondary forest intermediate cutting object woods. The method includes the steps of in cooperation with secondary forest characteristics and operation targets, selecting quantitative indexes, such as the freedom degree, the mixture degree, the health indexes, the purpose tree species characteristic indexes, the space density indexes and the open odds, which influence the probability that the woods in a secondary forest are determined as intermediate cutting objects, solving the weights of the six quantitative indexes with an analytic hierarchy process, analyzing correlations between the indexes which serve as independent variables and the intermediate cutting indexes which serve as dependent variables according to biological significances of the indexes for building the ICIi of the woods, and enabling the ICIi of the woods to be sort in a descending mode to determine the prior intermediate cutting object woods. The method is convenient to use, easy to operate and high in efficiency, and the accuracy can meet the requirement.

Description

technical field [0001] The invention belongs to a method for tending and thinning a natural secondary forest, in particular to a method for selecting a target tree for tending and thinning a natural secondary forest. Background technique [0002] Tending and thinning is an important technical measure of forest management. Its purpose is to adjust the composition and density of stand species, improve the environment in the forest, increase the productivity of the stand, enhance the landscape value of the stand, and enhance the resistance of the stand. The tending and thinning technology of artificial pure forest is relatively mature, but there are not many reports on tending and thinning technology of secondary forest. [0003] After the forest management unit determines the intensity of tending and thinning, the selection of tending and thinning target trees is one of the key technologies for the healthy management of forest ecosystems. Sometimes although the start period o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 吕勇刘发林曾思齐肖化顺熊露桥吕飞舟刘玉罗鹏飞
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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