CN-120355060-B - Method for determining bamboo forest cultivation target by using canopy density of vegetation type of upper arbor

CN120355060BCN 120355060 BCN120355060 BCN 120355060BCN-120355060-B

Abstract

The embodiment of the invention provides a method for determining a bamboo forest cultivation target by using the canopy density of an upper arbor vegetation type, which relates to the technical field of forestry, and is characterized in that the method is used for evaluating the related indexes of growth of square bamboos planted under different vegetation types in the forest under different site conditions, and the bamboo cultivation target under the corresponding forest types, forest types and origins is determined under the condition of each site by combining the related cutting technical rules according to the evaluation results and allowing the corresponding forest types, the origins of the forests and the range of the canopy density of the upper arbor to which the forest types can be adjusted. The method can also assist in screening cultivation sites according to the determined square bamboo cultivation targets and by combining factors such as forest category, forest species, origin and the like, thereby providing scientific basis for development planning of bamboo industry.

Inventors

Bai Zuyun
LI CHANGWEI
ZHAO JING
Yang Taixiang
PU HONG
ZHANG DELIANG
Zu Wanqiao
PENG CAN

Assignees

昭通市森林和草原资源管理站

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (7)

1. A method for determining a bamboo cultivation target using a canopy density of an upper tree vegetation type, comprising: selecting a land block planted with bamboo forests under the forests, dividing the land block into a plurality of canopy density levels according to canopy density of an upper arbor, and randomly selecting a plurality of samples in a region corresponding to each canopy density level; The growth index of each sample is investigated, F detection and Q detection analysis are carried out on the measurement results of the samples, and whether the area corresponding to each canopy density level is suitable for bamboo forest planting is determined according to the analysis results; In the analysis of each growth index, all N areas corresponding to the canopy density level are sequenced according to the height of a measurement result, and the judgment is carried out according to the following rules: S1, judging that the growth index is optimal under all the canopy density levels if the measurement results of N areas have no significant difference, and judging in the S2 if the measurement results of one area have significant difference; S2, if the lowest area of the measurement result has no significant difference with A areas in the rest N-1 areas, judging that the growth index is unsuitable under the level of the canopy closure degree corresponding to the lowest area and the A areas, and judging in the S3 step in the rest N-1-A areas; S3, judging that the growth index is optimal under the level of the closing degree corresponding to the highest region and the B regions in the rest N-1-A regions if no significant difference exists between the highest region of the measurement result and the rest B regions; Respectively quantifying and summing analysis results of the growth indexes in the areas corresponding to the canopy density levels, judging that the results are most suitable for 1 minute, are suitable for 0.5 minute and are not suitable for 0 minute, and judging whether the canopy density levels are suitable for the growth of the bamboo forest or not through a summation score P; When P is more than or equal to 0.8 x P max , the optimum value is judged, when P is 0.8 x P max ＞P≥0.6*P max , the optimum value is judged, when P is less than 0.6 x P max , the optimum value is judged, wherein P max is the theoretical maximum value of sum score P.
2. The method of claim 1, wherein the plot is selected for analysis under substantially uniform ground conditions and with substantially uniform upper arbor vegetation types including at least one of conifer, evergreen broadleaf, needle broadleaf and deciduous broadleaf.
3. The method of claim 1, wherein the growth indicator comprises a number of bamboo shoots, a bamboo shoot ground diameter, a bamboo number, a bamboo height, and a bamboo ground diameter.
4. The method of claim 3, wherein the measurement results of each of the growth indicators are determined by F detection analysis, and if there is no significant difference in the F detection results, the growth indicator is determined to be optimal at each of the canopy density levels, and if there is a significant difference in the F detection results, the Q test analysis is further performed.
5. The method of claim 4, wherein when the bamboo forest is used as a bamboo wood, the analysis and judgment are performed by taking the sum score P of five growth indexes of the number of bamboo shoots, the ground diameter of the bamboo shoots, the number of bamboo shoots, the height of the bamboo and the ground diameter of the bamboo.
6. The method of claim 5, wherein when the bamboo forest is used as a material, the analysis and judgment are performed by replacing P with a sum score P 1 of three growth indexes of the number of bamboos, the height of the bamboos and the ground diameter of the bamboos.
7. The method of claim 6, wherein when the bamboo forest is used as a bamboo shoot, the analysis and judgment are performed by replacing P with a sum score P 2 of two growth indexes of the number of the bamboo shoots and the ground diameter of the bamboo shoots.

Description

Method for determining bamboo forest cultivation target by using canopy density of vegetation type of upper arbor Technical Field The invention relates to the technical field of forestry, in particular to a method for determining a bamboo forest cultivation target by using the canopy density of an upper arbor vegetation type. Background The cultivation target of the bamboo forest has diversified characteristics, and the bamboo forest has ecological benefit, economic benefit and ecological benefit like the arbor forest, and can be used for operating wood forest, economic forest and firewood forest (energy forest) and also can be used for operating protective forest and special purpose forest. The cultivation targets of the bamboo forest can be divided into 3 different cultivation targets of bamboo forest for bamboo shoots, bamboo forest for wood and bamboo forest for bamboo shoots. In the current forestry development, particularly in the situation that cultivated land is more and more strictly protected, under-forest economy is promoted greatly, and the high-quality development of forestry is realized, development space is required to be expanded urgently. Along with the development of the bamboo industry and the development of the resources under the forests, how to plan to develop the bamboo industry under the forests is well, and especially how to scientifically determine whether the forestation land block is used for cultivating bamboo for bamboo shoots, bamboo for wood or bamboo for bamboo shoots and wood for two-purpose bamboo has important significance for realizing scientific management and sustainable development. Zhaotong proposes the development goal of developing two-one million mu bamboo industry, wherein 100 ten thousand mu of square bamboo and 100 ten thousand mu of zhan bamboo are developed. Square bamboo refers to the generic term for each bamboo species in the square bamboo group in the square bamboo genus. The growth of square bamboos and bamboos requires shelter of the upper layer arbor, but the higher the degree of closure of the upper layer arbor is, the better, and not as small as possible, and has close relation with the cultivation target. Different cultivation targets have different requirements on the canopy density of the upper arbor. Under the condition that the condition of the land is basically the same, the canopy density of the upper arbor becomes a main factor affecting the economic objective of the "square bamboo" under the forest. However, the regulation of the canopy tree canopy density is limited by the harvesting policy and the harvesting specifications. Therefore, an effective method needs to be established to help determine the cultivation targets of the bamboos under the corresponding forest category, forest species and origin under each site condition, or to assist in screening cultivation sites according to the determined cultivation targets of the bamboos, thereby providing scientific basis for development planning of bamboo industry. Disclosure of Invention The invention aims to provide a method for determining a bamboo forest cultivation target by using the canopy density of an upper arbor vegetation type, which is scientific and reasonable and effective, can provide reasonable proposal of the bamboo forest cultivation target according to the canopy density of the upper arbor vegetation type, and provides scientific basis for development and planning of the bamboo industry. Embodiments of the present invention are implemented as follows: a method for determining a bamboo cultivation target using a canopy density of an upper tree vegetation type, comprising: selecting a land block planted with bamboo forests under the forests, dividing the land block into a plurality of canopy density levels according to canopy density of trees on an upper layer, and randomly selecting a plurality of samples in a region corresponding to each canopy density level; and (3) investigating the growth index of each sample, performing F detection and Q detection analysis on the measurement result of the sample, and determining whether the area corresponding to each canopy density level is suitable for bamboo forest planting according to the analysis result. The embodiment of the invention has the beneficial effects that: The embodiment of the invention provides a method for determining a bamboo forest cultivation target by using the canopy density of an upper arbor vegetation type, which is characterized in that the method is used for evaluating the related indexes of the growth of square bamboos planted under different vegetation types under different standing conditions, and according to the evaluation result, the corresponding forest types, the origins of the forests and the range of the canopy density of the upper arbor, which can be adjusted by the forest types of the forests, are allowed by combining the related cutting technical rules, and the bamboo cultivation target under the