The comparison of the regression equation method with the portable leaf area meter method The main functions of the leaves are photosynthesis, transpiration, respiration, and absorption. About 90% of dry matter in plants is synthesized through leaves. In plant production and scientific research, leaf area is not only an important indicator of physiological and biochemical, genetic and breeding, growth and development, yield and quality, but also an important basis for formulating cultivation patterns, pruning, fertilization, pest and disease development monitoring, and plant population analysis. one. Non-in vitro measurements of leaf area use portable leaf area meters and regression equations for measurements.
For the regression equation, the leaf area meter y is used to determine the single leaf area of ​​the plant at first. If there are wrinkles on the leaf, then the blade can be divided into several pieces with a thin blade. The leaf areas of the strips are accumulated, the leaf vein lengths of the leaves are measured, and these data are recorded. These data are analyzed by using SPSS mathematical statistics software, and they are subjected to one-way and multiple-variable linear regression processing, respectively, and all winning entries are established. Regression equation. According to their own needs for measurement accuracy to choose the best far-end calculation method, but the more variable factors, the higher the correlation coefficient of the equation, when the measurement is carried out as long as the ruler to measure the corresponding parameters can be drawn As a result, the speed and accuracy of measurement are more accurate than using conventional weighing methods.
The use of a portable leaf area meter is relatively rapid, but there are certain limitations to using this method to perform measurements. The determination of leaf area index for small areas is quick and convenient, but it is When measuring the area, the speed will be slower.
For the regression equation, the leaf area meter y is used to determine the single leaf area of ​​the plant at first. If there are wrinkles on the leaf, then the blade can be divided into several pieces with a thin blade. The leaf areas of the strips are accumulated, the leaf vein lengths of the leaves are measured, and these data are recorded. These data are analyzed by using SPSS mathematical statistics software, and they are subjected to one-way and multiple-variable linear regression processing, respectively, and all winning entries are established. Regression equation. According to their own needs for measurement accuracy to choose the best far-end calculation method, but the more variable factors, the higher the correlation coefficient of the equation, when the measurement is carried out as long as the ruler to measure the corresponding parameters can be drawn As a result, the speed and accuracy of measurement are more accurate than using conventional weighing methods.
The use of a portable leaf area meter is relatively rapid, but there are certain limitations to using this method to perform measurements. The determination of leaf area index for small areas is quick and convenient, but it is When measuring the area, the speed will be slower.
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