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Prediction method for net photosynthetic rate of population

A technology of net photosynthetic rate and prediction method, applied in the measurement of color/spectral characteristics, etc., can solve the problems of large workload of plant leaf area, difficulty in predicting regression equation, low prediction accuracy, etc., achieving strong generalization ability and overcoming global problems. Learning ability and local learning ability cannot be adjusted independently and are easy to achieve

Inactive Publication Date: 2013-08-07
JILIN UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the relatively large workload of plant leaf area in the test area existing in the prior art, the difficulty of establishing a group net photosynthetic rate prediction regression equation, and the establishment of a group net photosynthetic rate prediction model. The problem of low accuracy provides a method for predicting the net photosynthetic rate of the population

Method used

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  • Prediction method for net photosynthetic rate of population
  • Prediction method for net photosynthetic rate of population
  • Prediction method for net photosynthetic rate of population

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Embodiment

[0093] 1. Obtain the data of the spectral radiation ratio of each band of visible light in the region

[0094] refer to Figure 5 , randomly select S=17m in the understory ginseng planting base 2 In the experimental area, the MSR-16 portable multi-spectral radiometer is placed at a height of H=2m from the canopy of the understory ginseng plants, then the observation diameter of the ground plants is H / 2=1m, and the observation area is S 1 =0.785, then S / S 1 =21.656, the number of test units M=21, the measurement time span is from July 1st to August 31st, 2010, and the measurement time is 9:00-16:00 on the test day. There are 7 test time periods in total, so choose The number of test units N=3, adopt the method for obtaining the spectral radiation ratio relationship data of each band of visible light in the region introduced by the present invention, obtain the spectral radiation ratio relationship data M_D of each band of visible light in the region, and carry out [0,1] norma...

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Abstract

The invention discloses a prediction method for the net photosynthetic rate of a population and aims to overcome the problems that it is difficult to establish a prediction regression equation for the net photosynthetic rate of a population, considerable related data are needed in establishment of a prediction model for the net photosynthetic rate of the population and prediction accuracy is not high. The method comprises the following steps: 1, acquiring proportioning data of spectral radiance of every wave band of visible light in a region, wherein a portable multispectral radiometer is installed at a height H higher than the canopy of a plant in the test region with an area of S, the proportioning data M_D of spectral radiance of every wave band of visible light in the test region in different periods is obtained, and [0,1] normalization processing is carried out; 2, acquiring data of the net photosynthetic rate of the population; 3, constructing a bionic kernel function; 4, establishing an SVM training set and an SVM prediction set; 5, carrying out tool selection and parameter optimization on a prediction model; and 6, predicting the net photosynthetic rate of the population, which comprises obtainment of the prediction model Model, obtainment of a predicted value Predict of the net photosynthetic rate of the population and determination of reliability of the prediction model Model.

Description

technical field [0001] The invention relates to a method for predicting the net photosynthetic rate of plant populations, more specifically, the invention relates to a method for predicting the net photosynthetic rate of the population with a bionic kernel function. Background technique [0002] As the most necessary resource for plants, light is an important factor affecting its form and function. The individual net photosynthetic rate reflects the accumulation of organic matter in a single plant and is an important factor affecting the form and function of a single plant. The group net photosynthetic rate is The sum of the individual net photosynthetic rates of this type of plant in a region reflects the accumulation of total photosynthetic organic matter of the plants in the region over a period of time, which is of great reference value for analyzing the overall shape and function of the plants in the region. Speed ​​has a strong practical significance in agricultural pr...

Claims

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Application Information

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IPC IPC(8): G01N21/25
Inventor 于海业武海巍田彦涛张蕾张强王淑杰肖英奎
Owner JILIN UNIV
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