Pinus yunnanensis stand growth determination method and system

Abstract

The invention discloses a pinus yunnanensis stand growth determination method and system. The method comprises the following steps: selecting a sample plot, and measuring the current diameter at breast height and the current tree height of the pinus yunnanensis in the sample plot; grading the pinus yunnanensis in the sample plot according to the current diameter at breast height; selecting n pinusyunnanensis plants from each grade, and drilling the selected pinus yunnanensis plants at the current diameter at breast height to obtain the first m-year ring width of the pinus yunnanensis plants;subtracting the first m-year ring width from the current diameter at breast height to obtain the diameter at breast height in the mth year; calculating the tree height in the mth year by using the diameter at breast height and a tree height model according to the diameter at breast height in the mth year; determining the current single-tree biomass and the single-tree biomass in the mth year by adopting a pinus yunnanensis biomass different-speed growth equation; determining the current stand biomass of the sample plot according to the current single-tree biomass; determining the stand biomassof the sample plot in the mth year according to the single-tree biomass in the mth year; and determining the stand growth according to the current stand biomass and the stand biomass in the mth year.Through the method, the stand growth can be rapidly and accurately determined.

Description

technical field [0001] The invention relates to the technical field of stand growth, in particular to a method and system for determining the growth of a pine stand. Background technique [0002] With CO 2 With the increase of emissions, the global temperature is increasing, and the global extreme climate is gradually increasing, effectively reducing CO 2 One way of doing this is by increasing forest carbon sinks. Accurately estimating forest carbon sinks is based on the effective determination of forest growth. At present, the estimation of forest arbor growth is often obtained through repeated measurement conversion of fixed sample plots, which is time-consuming, expensive, wastes a lot of manpower and material resources, and is not easy to popularize. , cannot meet the demand for establishing a mature and stable carbon sink market. Contents of the invention [0003] Based on this, the present invention provides a method and system for determining the growth amount of...

AI Technical Summary

Problems solved by technology

Accurately estimating forest carbon sinks is based on the effective determination of forest growth. At present, the estimation of forest arbor growth is often obtained through repeated measurement of fixed sample plots, which is time-consuming, expensive, and wastes a lot of manpower and material resources, and is not easy to popularize. , cannot meet the demand for establishing a mature and stable carbon sink market

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