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Method for measuring and calculating forest stand mingling degree by adopting seven-tree method

A technology of mixed degree and forest stands, which is applied in the field of measuring mixed degree of forest stands, can solve the problems of measurement accuracy limitation, heavy workload, high cost, etc., and achieve the effect of reducing field measurement workload and improving measurement accuracy

Inactive Publication Date: 2016-10-26
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

The traditional measurement method of forest stand mixing degree adopts plot survey or 5-tree method. Although the former has high accuracy, it has a large workload and high cost. The latter has limited measurement accuracy due to unrepresentative selected places.

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  • Method for measuring and calculating forest stand mingling degree by adopting seven-tree method

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Embodiment Construction

[0015] A kind of seven tree method is different from the prior art in measuring and calculating the mixed degree of forest stand, and has been greatly improved, specifically:

[0016] 1) if figure 1 As shown, select a suitable sample tree in the forest stand to be tested as the central tree, and record it as the No. , record the northernmost sample tree as No. 1, and mark it by rotating clockwise, which are respectively No. 1, 2, 3, 4, 5, and 6 trees;

[0017] 2) Compare the tree species of tree i (i=1, 2, ..., 6) with tree 0 in turn, and obtain the same number of tree species as n 1 (n 1 ≤6);

[0018] 3) Compare the tree species of tree i with tree i+1 in turn, and obtain the same number of tree species as n 2 (n 2 ≤6), wherein, i=1, 2, ..., 6, and when i=6, i+1=1;

[0019] 4) Using digital models Calculate the mixed degree M of the stand with No. 0 tree as the reference tree.

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Abstract

The invention discloses a method for measuring and calculating a forest stand mingling degree by adopting a seven-tree method. The method comprises the steps of selecting 7 trees including a center tree and 6 sample trees which are nearest to the center tree from a forest stand to be measured, and measuring and calculating a mingling degree M of the forest stand to be measured through comparing consistency of the selected sample tree species. The method does not need to consider position distribution of the trees, reduces fieldwork measurement workload, and increases measurement precision of forest stand mingling degree.

Description

1. Technical field [0001] The invention relates to a method for measuring the mixed degree of forest stands, in particular to a method for measuring and calculating the mixed degree of forest stands by the seven tree method. 2. Technical Background [0002] Forest spatial structure is an important feature of forest communities, which reflects the spatial relationship of species in forest communities, that is, the distribution pattern of trees and the spatial arrangement of their attributes. Stand mixed degree reflects the degree of spatial isolation of tree species in mixed forests, and is an important index to measure the complexity of forest community structure. Therefore, the study of forest mixed degree is of great significance to understand the status quo of forest structure. The traditional method of measuring the intermingling degree of forest stands adopts the plot survey or the 5-tree method. Although the former has high accuracy, it has a large workload and high co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02
CPCG06Q50/02
Inventor 冯仲科杨立岩祁曼邱梓轩
Owner BEIJING FORESTRY UNIVERSITY
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