Leaf surface dust fall quantity testing method based on hyperspectral technique

Abstract

The invention relates to a leaf surface dust fall quantity testing method based on a hyperspectral technique. The method comprises the following steps: firstly, collecting healthy leaves with different leaf surface dust fall quantities, quickly testing spectral information of a single leaf, putting the leaf subjected to the spectral information testing into a room, acquiring leaf surface dust fall quantity data of the leaf by virtue of a leaf area instrument and an electronic scale, and determining a sensitive spectral band subjected to leaf surface dust fall by analyzing the correlation between hyperspectral information and the leaf surface dust fall quantity data; and carrying out modeling by virtue of the data of the sensitive spectral band subjected to the leaf surface dust fall, selecting a model with a minimal root-mean-square error and maximal errors between a determination coefficient and a predicted root-mean-square error and between a sample standard deviation and the predicted root-mean-square error, and predicting the leaf surface dust fall quantity of the model only by virtue of the hyperspectral information of the leaf. Compared with a traditional determination method, the leaf surface dust fall quantity testing method has the beneficial effects of reducing the tedious experimental steps of indoor leaf area testing, cleaning, weighing and the like, being simple, convenient and rapid, and meanwhile, providing references for monitoring of the sand storm strength and environment quality of a dust fall region by virtue of astronautic hyperspectral remote sensing.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring and evaluation, in particular to a method for measuring the amount of dust on leaves based on hyperspectral technology. Background technique [0002] Sandstorm is a common disastrous weather in arid and semi-arid regions of northern my country. When a sandstorm breaks out, a large amount of floating dust is generated in the air, and the floating dust forms obvious dust on the surface of plant leaves after settlement, which is usually called foliar dustfall. It is a main factor for air quality and ecological environment quality, and it is also an indicator factor for the intensity of sandstorm disasters. Some studies have shown that foliar dustfall has an obvious harmful effect on the growth and development of plants. At the same time, some scholars have pointed out that foliar dustfall can affect the tissue structure of plant leaves, resulting in irregular arrangement of leaf pal...

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Problems solved by technology

[0006] The present invention is to solve the problem that the existing quantitative monitoring method for the damage of the environment and vegetation in the subsidence area after the sandstorm settles cannot reflect the influence intensity and actual damage degree of the sandstorm to the affected area, and proposes a method of measuring The method of measuring leaf dustfall based on hyperspectral technology to truly and effectively reflect the impact intensity and actual damage degree of sandstorms in this area

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