Method for predicating biomass of overground part of Aegiceras corniculatum

Abstract

The invention discloses a method for predicating biomass of overground part of Aegiceras corniculatum and belongs to the technical field of coastal mangrove ecological system protection and restoration, which is implemented according to the steps as follows: selecting Aegiceras corniculatum individuals with a certain number of n of different sizes and with statistics significances, respectively measuring the crown diameters and heights of the Aegiceras corniculatum individuals; then measuring the organisms on the overground part actually by a harvest method and implementing regression implemented according to a power exponent equation: Y=a*b, thus obtaining a power exponent equation capable of predicating the biomass of the overground part of the Aegiceras corniculatum based on the crown diameters and heights; then actually measuring the heights H (m) and the crown diameters CD (m) of the Aegiceras corniculatum plants the biomass liveweight of which is to be predicated and respectively substituting the heights and the crown diameters to the power exponent equation, wherein the calculated AGB value is the biomass liveweight (kg, fresh weight) of the overground part of the Aegicerascorniculatum tree to be predicated. As the heights and the crown diameters with obvious characteristics are adopted in the method for predicating biomass of overground part of Aegiceras corniculatum,the precision is high. The predicating method is simple and convenient, and is particularly easy to operate in muddy mangrove marshes.

Description

technical field [0001] The invention discloses a method for predicting the biomass of the aboveground part of the mangrove plant tung tree, which belongs to the technical field of coastal mangrove ecosystem protection and restoration. Background technique: [0002] As the most active and key factor in the ecosystem, the biomass of plants directly affects the structure and function of the ecosystem, and is also one of the important evaluation indicators for the health of the ecosystem. Systematic research is of great significance. Usually, the direct quadrat harvesting method is often used to obtain plant biomass. However, for the already fragile and rare mangrove ecosystem in the coastal zone, the direct quadrat harvesting method is not only destructive, but also difficult due to muddy conditions. Hard to harvest. Therefore, people often use some simple and easy-to-measure growth indicators to predict the aboveground biomass (AGB) of different mangrove plants through simil...

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Problems solved by technology

Some scholars have also applied the above regression equation to the prediction of the biomass of the above-ground part of the tung tree that has no obvious main stem and is mostly in clusters. Although the results show that it has high accuracy, in actual prediction, the It is difficult or even impossible to determine the growth indicators such as diameter at breast height and base stem, so the accuracy of prediction will be greatly reduced

In order to solve this problem, foreign studies have used the above prediction methods to predict the stems of tung trees with multiple stems (clumps) and then add them together to obtain the biomass of the aboveground part of the whole plant, which increases the accuracy of prediction. , but greatly increases the complexity of the prediction

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