The advantage of the regression equation method for measuring leaf area and the conversion method The regression equation Our earliest contact was used in mathematics, but the regression equation method has a certain use in many parameters of agriculture, in agriculture chlorophyll content, fat smoke point have certain The use of leaf area measurements can also be calculated using the regression equation method. Leaf area measurements can also be measured and manipulated using a handheld leaf area meter. How is the use of the regression equation to measure leaf area? And its accuracy is not high?
The most difficult to calculate in the regression equation method is the calculation of that coefficient. At the same time, the coefficient of each plant is different. The difference in planting fields of the same variety also leads to differences in coefficients. Therefore, each time the regression equation method is used. The coefficient is calculated when calculating the leaf area of ​​a new species. The conversion method of this coefficient is: input the leaf area measured by the leaf length × leaf width and the handheld leaf area meter into the computer DPS data processing system for regression analysis, and obtain the regression equation of the measured plant. Regression equations are used to know the fixed coefficients, and then all the measurement results are compared and analyzed to see if there is a certain linear relationship between the data and the actual measurement results. If there is a linear relationship, the regression equation has a certain degree of accuracy. .
By using the regression equation method and other several measurement methods to compare, it was found that the traditional measurement method is time-consuming and labor-consuming, and it needs to be measured in vitro, which is more destructive to plants. Live measurement method using handheld leaf area meter method to measure the accuracy of the comparison is high, but the instrument needs to spend a certain amount of money to purchase, and the use of CAD graphics analysis, high accuracy, adaptability, but the measurement The result may be affected by the accuracy of the blade itself and the viewing angle of the camera. However, when using the regression equation method to measure, the results are very different, the measurement accuracy is high, and the cost of the funds is low. The labor and material resources used for the measurement are relatively low.
The most difficult to calculate in the regression equation method is the calculation of that coefficient. At the same time, the coefficient of each plant is different. The difference in planting fields of the same variety also leads to differences in coefficients. Therefore, each time the regression equation method is used. The coefficient is calculated when calculating the leaf area of ​​a new species. The conversion method of this coefficient is: input the leaf area measured by the leaf length × leaf width and the handheld leaf area meter into the computer DPS data processing system for regression analysis, and obtain the regression equation of the measured plant. Regression equations are used to know the fixed coefficients, and then all the measurement results are compared and analyzed to see if there is a certain linear relationship between the data and the actual measurement results. If there is a linear relationship, the regression equation has a certain degree of accuracy. .
By using the regression equation method and other several measurement methods to compare, it was found that the traditional measurement method is time-consuming and labor-consuming, and it needs to be measured in vitro, which is more destructive to plants. Live measurement method using handheld leaf area meter method to measure the accuracy of the comparison is high, but the instrument needs to spend a certain amount of money to purchase, and the use of CAD graphics analysis, high accuracy, adaptability, but the measurement The result may be affected by the accuracy of the blade itself and the viewing angle of the camera. However, when using the regression equation method to measure, the results are very different, the measurement accuracy is high, and the cost of the funds is low. The labor and material resources used for the measurement are relatively low.