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Method for measuring and calculating area of mangrove plant kandelia candel leaf

A technology of candela leaves and area, which is applied in the field of measuring and calculating the area of ​​candela leaves of mangrove plants, to achieve the effect of easy and accurate calculation work

Inactive Publication Date: 2012-08-08
JIANGSU UNIV
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Problems solved by technology

At present, there have been systematic studies on the photosynthetic characteristics of candelabra, but there have been no reports on its leaf area measurement and primary productivity. To establish the leaf area fitting regression equation based on the two indexes of maximum leaf length and maximum leaf width, so as to accurately measure the leaf area value of candela, and provide a technical basis for the primary productivity research of wetland ecosystems

Method used

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  • Method for measuring and calculating area of mangrove plant kandelia candel leaf
  • Method for measuring and calculating area of mangrove plant kandelia candel leaf
  • Method for measuring and calculating area of mangrove plant kandelia candel leaf

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Embodiment 1

[0014] Embodiment 1: The implementation site is located in the Quanzhou Bay Mangrove Nature Reserve, Fujian Province. In mid-September 2011, 57 candelabra leaves with different sizes and normal leaf shapes were picked in the wetland, and the largest leaves were measured by a leaf area scanner. Length L (mm), maximum leaf width W (mm) and leaf area A (mm 2 ). According to the binary nonlinear regression equation A=aL b1 W b2 Perform fitting to obtain the regression coefficients a and b 1 and b 2 0.7297, 0.8698 and 1.1600 respectively, thus obtaining the regression equation that can accurately measure the area of ​​candela leaves (Table 1)

[0015] Table 1 Regression equation for calculating the leaf area of ​​candelabra based on the maximum leaf length and maximum leaf width

[0016]

[0017]

[0018] Whether from the coefficient of determination R 2 See, from the relative error value of the measured value and the calculated value, the regression equation has excell...

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Abstract

The invention relates to a method for measuring and calculating an area of a mangrove plant kandelia candel leaf, which belongs to the technical field of coastal mangrove forest wetland ecosystem protection and primary productivity evaluation. The method comprises the steps of: firstly picking kandelia candel leaves with a given quantity, the same size and normal shapes as well as statistical significance, and measuring data of each leaf such as an area, a maximal length and a maximal width by utilizing a leaf area scanner; implementing the regression analysis through a nonlinear equation of Y=aX1b1X2ba, and determining the regression coefficients a, b1 and b2; obtaining an equation capable of measuring the area of the kandelia candel leaf: A=aLb1Wb2; and measuring the maximal length and the maximal width of a kandelia candel leaf on site, and respectively putting the measured maximal length and maximal width into the equation to obtain the area of the kandelia candel leaf to be measured and calculated. The invention provides a simple, easy and precise method for measuring and calculating the kandelia candel leaf, so that a more convenient technology and a method for supporting the evaluation on the primary productivity of the mangrove forest ecosystem are provided.

Description

technical field [0001] The invention discloses a method for measuring and calculating the area of ​​mangrove plant candela leaves, and belongs to the technical fields of coastal mangrove wetland ecosystem protection, primary productivity evaluation, and the like. Background technique [0002] Mangrove wetlands are the last "ecological barrier" for the transition from terrestrial ecosystems to marine ecosystems, and have extremely important ecological functions for both land and ocean. As the dominant plants in wetlands, mangroves directly determine the structure and function of wetland ecosystems. Biomass indicators are often used in research on the health assessment, protection and restoration of mangrove wetland ecosystems. However, the biomass index is only a stock index after all, and it is difficult to accurately reflect the productivity of mangrove plants. The primary productivity index based on variables such as photosynthetic velocity, leaf area coefficient, and li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/28
Inventor 付为国吴沿友
Owner JIANGSU UNIV
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